improvement of thermal insulation and water cleaning /air...
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MOEJ/GEC JCM Feasibility Study (FS) 2013
Final Report (Summary)
“ Improvement of thermal insulation and
water cleaning/air purge at power plant”
(Implemented by Kanden Plant Co., Inc.)
Study partners The Ulaanbaatar Third Power Plant Co., Ltd
Thermal Power Plant #4 Company
Mongolia Ministry of Energy
Mongolia Ministry of Environment and Green Development
Project site Mongolia/ Ulaanbaatar
Category of project Energy Efficiency Improvement
Description of project Thermal insulation installation by “Overwrapping
Insulation Method (ECO-AIM)” which is patented by Nichias
Corporation provides not only reduction of GHG emissions
but also co-benefit as reduction of atmospheric pollution.
And it does not require removing existing thermal insulation
materials that contributes reduction of disagreeable wastes.
Introduction of condenser tube cleaning using “Brush
Inset Cleaning (Rakuchin Gun Device) Method” which is
developed by Kanden Plant Co., Inc. is expected to improve
work environment and efficiency.
Reducing 50% or more of supply water consumption and
drainage is estimated as the result. And it is expected that
removal rate of foreign bodies is high thus condenser
performance is recovered due to improvement of degree of
vacuum and turbine efficiency drop is prevented.
It is studied as feasibility study by surveying The
Ulaanbaatar Third Power Plant Co., Ltd (hereinafter
described as CHP-3) & Thermal Power Plant #4 Company
(herein after described as CHP-4). Investigation for energy
efficiency improvement by thermal diagnosis of existing
thermal insulation materials in major facilities, energy
efficiency improvement by condenser tube cleaning,
feasibility of MRV, etc. are implemented then feasibility for
project is studied.
JCM
methodology
Eligibility
criteria
● Thermal insulation installation by “Overwrapping
Insulation Method”:
Criterion 1: Project activity is a thermal insulation installation
work to reduce radiation heat quantity from surfaces of
existing heat/ power supply facilities of thermal power
plants by “Overwrapping Insulation Method”.
Criterion 2: Project activity is applicable to the objectives of
existing heat/ power supply facilities.
Criterion 3: Installation method for the project is carried out
JCM Feasibility Study (FS) 2013 – Final Report
to avoid removal of existing thermal insulation materials
(asbestos, etc.). Thermal insulation material used for the
project does not contain asbestos.
Criterion 4: Thermal insulation installation works are
complied with the low on occupational safety and health.
Criterion 5: Thermal insulation material used for the project is
applicable to the temperature range between -40C and
+650C.
Criterion 6: Thermal conductivity of thermal insulation
material used for the project is not more than the values
given in the following table.
Average temperature Thermal conductivity
F C Btu・in/hr・ft2・F W/m・K
75 23.9 0.14 0.021
100 37.8 0.15 0.022
200 93.3 0.16 0.023
300 149 0.18 0.025
400 204 0.20 0.029
500 260 0.22 0.032
600 316 0.25 0.036
700 371 0.30 0.043
● Condenser cleaning work by “Brush Inset Cleaning
Method”:
Criterion 1: Reference activity is implemented by discharging
high pressure water in condenser tube cleaning during
shutdown period of the turbine unit.
Criterion 2: Project activity is to improve efficiency of
condenser tube cleaning work that is to inset a brush to
every condenser tube then shove the brush by high
pressure water using a cleaning gun.
Criterion 3: Project participants show reliable and evidenced
basis that water consumption (or drainage) of “Brush Inset
Cleaning Method (project activity)” is reduced over 50%
comparing with “Conventional Method (reference
activity)” by one of following measures.
- Preliminary demonstration activities of “Brush Inset
Cleaning Method” at thermal power plants in Mongolia
- Verified historical data at thermal power plants in Japan
Default
values
● Thermal insulation installation by “Overwrapping
Insulation Method”:
▪ Boiler efficiency at the thermal power plant
The most conservative value (boiler efficiency = 1.0)
▪ CO2 emissions factor of coal
Default value of lignite described in “2006 IPCC Guidelines
for National Greenhouse Gas Inventory” (0.101tCO2/GJ)
▪ Pump efficiencies for fire-fighting water pump and
drainage pump
JCM Feasibility Study (FS) 2013 – Final Report
The most conservative values (pump efficiency = 0.9)
▪ Three-phase induction motor efficiencies of fire-fighting
water pump and drainage pump
The most conservative value (motor efficiency = 1.0)
● Condenser tube cleaning by “Brush Inset Cleaning
Method”:
▪ CO2 (carbon dioxide) emissions factor of electricity
supplied to the electricity grid at the thermal power plant
(EFCO2,elec-ih)
It is calculated from coal consumption per electricity unit
supplied to the electricity grid at the thermal power plants
(g/kWh) and default values of CO2 emissions factor of
“Lignite” according to “2006 IPCC Guidelines for National
Greenhouse Gas Inventory” (0.101tCO2/GJ)
Calculation
of
reference
emissions
● Thermal insulation installation by “Overwrapping
Insulation Method”:
=> There are existing heat/ power supply facilities and
existing thermal insulation materials covering the facilities
at present. And another type of insulation material is
placed to cover them for the project (three-layered
structure). => It is the method to set reduction of radiation
heat quantity by overwrapping insulation method as
default and directly calculate emissions reduction using
the default value.
To find where ensures thermal balance and assess
radiation heat quantity is determined as basis for
quantification by using measured thermal data at thermal
power plant such as steam.
Only the main steam pipe is identified to calculate
radiation heat quantity by using actual measured values of
such steam at the heat/ power supply facilities installed
thermal insulation at the result of survey.
Emissions reduction of radiation heat quantity is
calculated as reduction of coal consumptions that
corresponds to reduction of boiler fuel in this
methodology. It is based on deference of heat quantity
between inlet and outlet of main steam pipe with thermal
insulation.
Other five facilities except main steam pipe (boiler,
turbine, high/ low pressure feed water heater and boiler
feed water pipe) have no actual measured data of heat
loss as above mentioned.
Therefore, reduction on those radiation heat quantities
is calculated as thermal insulation effect by means of
sampling measurement method of surface temperature
and emissivity using infrared thermographic scanning.
Each of quantification for the 5 facilities except main
JCM Feasibility Study (FS) 2013 – Final Report
steam pipe is independently executed because shapes,
surface conditions, emissive conditions and
environmental conditions of facilities are widely varied.
● Condenser tube cleaning by “Brush Inset Cleaning
Method”:
Reference emissions are calculated from reference
electricity consumptions for condenser tube cleaning
works and CO2 emission factor electricity supplied to the
electricity grid by the thermal power plant.
Water consumptions and electricity consumptions have
not been monitored in “Conventional Cleaning Method” at
CHP-3 & CHP-4. And to identify electricity consumed in
condenser cleaning works is not possible because
fire-fighting pump is shared with other works.
Therefore reference emissions and project emissions
are quantified as to measure water consumptions per
condenser tube for “Brush Inset Cleaning Method” and
“Conventional Cleaning Method” during shutdown period
of turbine unit then to calculate additional electricity
consumption for fire-fighting pump and drainage pump
based on the water consumption using estimated
formulae.
Monitoring
method
● Thermal insulation installation by “Overwrapping
Insulation Method”:
1) Parameters to be monitored every monitoring period after
thermal insulation installation:
▪ Insulation installation areas at every heat/ power supply
facilities [m2]
▪ Total mass flow rate of superheated steam at outlet of
main steam pipe after thermal insulation installation [103
ton/y]
2) Parameters to be monitored only during the first
monitoring period after thermal insulation installation.
These parameters are defined as fixed values from second
monitoring period:
▪ Yearly average enthalpy of superheated steam at inlet/
outlet of main steam pipe after thermal insulation
installation [kJ/kg]
▪ Average surface temperature of each thermal insulation
material installed on heat/ power supply facility in
sampling measurement by infrared thermographic
scanning [K]
▪ Average surface temperature of each planned part of heat/
power supply facilities before thermal insulation
installation [K]
▪ Ambient temperature around each heat/ power supply
facilities before thermal insulation installation [K]
JCM Feasibility Study (FS) 2013 – Final Report
▪ Emissivity in sampling measurement by infrared
thermographic scanning before thermal insulation
installation [fraction]
3) Parameters to be monitored before thermal insulation
installation. These parameters are defined as fixed values
throughout monitoring period:
▪ Yearly average enthalpy of superheated steam at inlet/
outlet of main steam pipe before thermal insulation
installation [kJ/kg]
▪ Average surface temperature of each thermal insulation
material installed on heat/ power supply facility in
sampling measurement by infrared thermographic
scanning [K]
▪ Average surface temperature of each planned part of heat/
power supply facilities after thermal insulation installation
[K]
▪ Ambient temperature around every heat/ power supply
facilities after thermal insulation installation [K]
▪ Emissivity in sampling measurement by infrared
thermographic scanning before thermal insulation
installation [fraction]
● Condenser cleaning by “Brush Inset Cleaning Method”:
1) Parameters to be monitored during every shutdown of
turbine unit
▪ Number of times of condenser tube cleaning work of
turbine i in the thermal power plant
2) Parameters to be monitored during shutdown of turbine
unit in the first monitoring period after the start of project
▪ Water consumption of fire-fighting water pump per tube
per condenser tube cleaning work for turbine i during
shutdown of turbine unit in the first monitoring period
after the start of project
3) Parameters to be monitored during shutdown of turbine
unit
▪ Water consumption of fire-fighting water pump per tube
per condenser tube cleaning work for turbine i during
shutdown of turbine unit in the first monitoring period
before the start of project
GHG emission reductions ● Thermal insulation installation by “Overwrapping
Insulation Method”:
▪ Thermal insulation installation to deteriorated or defected
parts by means of “Overwrapping Insulation Method
(ECO-AIM)” using superior thermal insulation
performance of thermal insulation material gives that
reduction of radiation heat quantity from such main steam
pipe is reduced and boiler fuel (coal) corresponding to the
heat reduction is reduced. It results that CO2 emission is
JCM Feasibility Study (FS) 2013 – Final Report
reduced.
Emissions reduction for CHP-4 is not calculated in this
report.
● Condenser tube cleaning by “Brush Inset Cleaning
Method”:
▪ Condenser tube cleaning by “Brush Inset Cleaning
(Rakuchin Gun Device) Method” gives that cleaning water
consumption per time of cleaning is reduced comparing
with the conventional cleaning method and also frequency
of cleaning is reduced. It is expected that cleaning water
consumption is reduced over 50% per year and power
consumption for fire-fighting pump and drainage pump
which supply cleaning water is reduced accordingly. It
results that CO2 emission is reduced.
▪ Total values during the years of 2016 through 2025 are as
follows.
Reference emissions
(estimated)
Project emissions (estimated)
Emissions reduction
(estimated)
Thermal insulation installation by “Overwrapping Insulation Method (ECO-AIM)” for represented unit in CHP-3
N/A N/A 22,600t
CO2e
Condenser tube cleaning by “Brush Inset Cleaning (Rakuchin Gun Device) Method” in CHP-3 & CHP-4
50tCO2e 20tCO2e 30tCO2e
Environmental impacts The project activities are aimed for efficiency improvement
in thermal power plants and give just benefit as reduction of
atmospheric pollution to surrounding or remote area thus
negative effects are not occurred. And facility improvement
works give inconsiderable influence for environment such as
scaffolding works in very limited areas in the thermal power
plants thus preventive measures are not required.
Thermal insulation installation by “Overwrapping
Insulation Method (ECO-AIM)” is the method just to overwrap
the existing thermal insulation and does not require
removing the existing thermal insulation materials. Thus it
can avoid scattering the harmful existing materials
(asbestos, etc.) from the view of the occupational safety and
health.
Project planning 1. June 2015: Proposal for following JCM finance
programme project to GEC
● Efficiency improvement by means of thermal insulation
JCM Feasibility Study (FS) 2013 – Final Report
installation by “Overwrapping Insulation Method
(ECO-AIM)”:
At No.10 boiler/ No.7 high-pressure turbine in CHP-3 and
No.3 boiler in CHP-4;
1) Thermal insulation installation (CHP-3:1637m2, CHP-4:
3582m2)
2) Thermal diagnosis (before/ after thermal insulation
installation) by infrared thermographic scanning
3) Support for MRV activities
● Efficiency improvement for condenser tube cleaning by
“Brush Inset Cleaning (Rakuchin Gun Device) Method”:
At a 100MW class of representative turbine unit in CHP-4;
1) Manufacture and delivery of “Brush Inset Cleaning Device
(Rakuchin Gun Device) ”
2) Measurement for condenser performance data
3) Implementation of condenser tube cleaning by “Brush
Inset Cleaning (Rakuchin Gun Device) Method”
4) Study for energy efficiency improvement
5) Support for MRV activities
Overwrapping Insulation Method
(ECO-AIM)
180 Million
Japanese Yen
Brush Inset Cleaning (Rakuchin Gun
Device) Method
74 Million
Japanese Yen
Support Cost for MRV Activities 20 Million
Japanese Yen
▪ Initial investment amount: 274 million Japanese Yen
(including support cost for MRV activities)
▪ Annual operation and maintenance amount: 7 million
Japanese Yen
(mainly consumables for “Brush Inset Cleaning Device
(Rakuchin Gun Device) ” and support cost for MRV
activities)
* Annual operation and maintenance cost for thermal
insulation installation is basically nil.
▪ Start of local work: July 2015
▪ Work duration (lead time): Approximately 8 months
▪ Start of operation: April 2016
Promotion of Japanese
technology
● Thermal insulation installation by “Overwrapping
Insulation Method”:
It is offered that thermal insulation installation by
“Overwrapping Insulation Method (ECO-AIM)” is expected
to apply to other thermal power plants, heat supply
companies or common plants out of CHP-3 & CHP-4 by
the chief of Mongolia Ministry of Energy.
● Condenser tube cleaning by “Brush Inset Cleaning
Method”:
JCM Feasibility Study (FS) 2013 – Final Report
There are needs for introduction of “Brush Inset Cleaning
(Rakuchin Gun Device) Method” in Erdenet & Darkhan
thermal power plants in case it is verified that cleaning
water (drainage) consumption by the method is reduced
over 50% against the conventional tube cleaning method
and foreign bodies in tubes are completely removed.
Sustainable development in
host country
Implementation of thermal insulation installation using a
thermal insulation material, 10mm of Pyrogel XT, by
“Overwrapping Insulation Method (ECO-AIM)” gives life
extension effect to facilities. Persistent use of thermal power
plant facilities keeping necessary capacity results saves
additional social costs. Thus it contributes sustainable
development of Mongolia.
Introduction of condenser tube cleaning by “Brush Inset
Cleaning (Rakuchin Gun Device) Method” gives reduction of
cleaning water consumption and pump power consumption
and also substantial improvement for work environment for
condenser tube cleaning.
JCM Feasibility Study (FS) 2013
“Efficiency Improvement of Thermal Insulation Installation
and Condenser Cleaning at Thermal Power Plants”
(Host Country: Mongolia)
Study Entity: implemented by Kanden Plant Co., Inc.
1. Study Implementation Scheme
Kanden Plant Co., Ltd.: Overall management of FS, finance planning, technical support for
quantification of GHG emission reduction, etc.
Suuri-keikaku Co., Ltd.: Investigation for environmental integrity, sustainable development in
host country
Japan Quality Assurance Organization:
Support for MRV structure, PDD, etc,
Climate Exparts Ltd.: Investigation for methodology&PDD, etc.
Nichias Corporation: investigation for potential of energy efficiency improvement for
thermal insulation on major facilities in CHP-3 & CHP-4 by thermal
diagnosis, etc.
EEC Co., Ltd.: Technical support considering situation in Mongolia
2. Overview of Proposed JCM Project
(1) Description of Project Contents
Thermal insulation installation by “Overwrapping Insulation Method (ECO-AIM)” which is
patented by Nichias Corporation provides not only reduction of GHG emissions but also
co-benefit as reduction of atmospheric pollution. And it does not require removing existing
thermal insulation materials that contributes reduction of disagreeable wastes.
CO2 emission is reduced in accordance that plant heat efficiency is improved by means of
“Overwrapping Insulation Method (ECO-AIM)” installed to heat/ power supply facilities such as
pipes, boiler, drum, etc. in CHP-3 & CHP-4. Thermal insulation efficiency is measured by
infrared thermographic scanning.
Condenser cleaning works in CHP-3 & CHP-4 are executed using water cleaning and long
metal bars. It is expected that “Rakuchin Gun Device” gives improvement for work environment
and efficiency by means that water cleaning and air purge is continuously executed in an action. It
is estimated to reduce 50% of supply and waste water quantity as a result.
And also removal rate of foreign bodies is high so that condenser performance is recovered by
improvement of degree of vacuum then turbine efficiency drop is prevented.
CHP-3 & CHP-4 are supposed as counterparts and owners of the project. This FS is
implemented by surveying CHP-3 & CHP-4. Investigation for energy efficiency improvement by
thermal diagnosis of existing thermal insulation materials in major facilities, energy efficiency
improvement by condenser tube cleaning, feasibility of MRV, etc. are implemented then
feasibility for JCM is studied.
(2) Situation of Host Country
The sector 5 of National Appropriate Mitigation Actions (NAMAs) submitted by United
Nations Framework Convention on Climate Change is clearly described as efficiency
improvement at existing CHP (Combined Heat Power Plants) is a nation’s policy.
Both the projects, thermal insulation installation by “Overwrapping Insulation Method
(ECO-AIM)” and condenser tube cleaning by “Bruch Inset Cleaning (Rakuchin Gun Device)
Method” for CHPs, give plant efficiency improvement that meets the policy of Mongolia.
● Regarding relevant National Appropriate Mitigation Actions (NAMAs) by least developing
country
Mongolia is a signatory to the Copenhagen Accord and submitted the relevant NAMAs list to
UNFCCC in January 2010. A concept of GHG mitigation action is included in NAMAs and it is
assumed to implement obtaining international assistance for national capacity, advanced
technology transfer and financing.
● NAMAs submitted to UNFCCC
No Sectors-Action 9
1 Energy supply-Increase renewable options
2 Energy supply―Improve coal quality
3 Energy supply―Improve efficiency of heating boilers
4 Energy supply-Improve household stoves and furnaces
5 Energy supply=Improve Combined Heat Power (CHP) plants
6 Energy supply-Increase use of electricity for local heating in cities
7 Building-Increase building energy efficiency
8 Industry-Increase energy efficiency in industry
9 Transport-Use more fuel efficiency vehicles
10 Agriculture-Limit quantity & increase quality of live stock
11 Forestry-Improve forest management ,reduce emissions from deforestation and
forest degradation
Source:UNFCCC
3. Study Contents
(1) JCM methodology development
a. Eligibility criteria
Below table describes about CHP-3 (high-pressure unit) and it is available for CHP-4.
● Thermal insulation installation by “Overwrapping Insulation Method”:
Criterion 1: Project activity is an insulation installation work to reduce radiation heat quantity from
surfaces of existing heat/ power supply facilities of thermal power plant by “Overwrapping
Insulation Method”.
=> It is considered that there no specific problem because the description of cliterion shows
general activity of the project. activity
Criterion 2: Project activity is applicable to the objective of existing heat/ power supply facilities.
=> It is considered that there no specific problem because the description of cliterion shows
objects of the project.
Criterion 3: Installation method for the project is carried out to avoid removal of existing insulation
materials (asbestos, etc.). Thermal insulation material used for the project does not contain
asbestos.
=> It is considered that there no specific problem because the description of cliterion shows
features of “ECO-AIM” which is planned to introduce.
Criterion 4: Thermal insulation installation works are complied with the low on occupational safety
and health.
=> It is considered that ECO-AIM and Pyrogel must not be contrary to the law but further
confirmation of the low or regulations on occupational safety and health in Mongolia is
to be done to make sure. In case there is any restriction against materials containing
asbestos, it is to be described.
Criterion 5: Thermal insulation material used for the project is applicable to the temperature range
between -40℃ and +650℃.
=> It is considered that there no specific problem because the description of criterion shows
specific values of the material provided by Nichias Corporation.
Criterion 6: Thermal conductivity of insulation material used for the project is not more than the
values given in the following table.
Average Temperature Thermal Conductivity
F C Btu・in/hr・ft2・F W/m・K
75 23.9 0.14 0.021
100 37.8 0.15 0.022
200 93.3 0.16 0.023
300 149 0.18 0.025
400 204 0.20 0.029
500 260 0.22 0.032
600 316 0.25 0.036
700 371 0.30 0.043
=> It is considered that there no specific problem because the description of criterion shows
specific values of the material provided by Nichias Corporation.
● Condenser cleaning work by “Brush Inset Cleaning Method” :
Criterion 1: Reference activity is implemented by high pressure water discharging of condenser tube
cleaning during shutdown period of the turbine unit.
=> It is considered that there no specific problem because the description of cliterion shows
general activity of the project.
Criterion 2: Project activity is to improve efficiency of condenser tube cleaning by the cleaning work
that is to set a brush into every condenser tube then shove the brush by high pressure water
using a cleaning gun.
=> It is considered that there no specific problem because the description of cliterion shows
features of “Rakuchin Gun Device” which is planned to introduce.
Criterion 3: Project participants shows reliable basis with evidences that water consumption (or
drainage) of “Brush Inset Cleaning Method (project activity)” is reduced 50% or more
comparing with “Conventional Method (reference activity)” by one of following measures.
Preliminary demonstration activities of “Brush Inset Cleaning Method” at thermal power
plants in Mongolia
Verified historical data in power plants in Japan
=> Demonstration of condenser tube cleaning work by using “Bruch Inset Method” is
planned to implement after next year at thermal power plants in Mongolia.
Also Kanden Plant Co., Inc. is available to provide verified historical data at thermal
power plant in Japan.
b. Data and parameters fixed ex ante
Quantification for both of thermal insulation installation by “Overwrapping Insulation Method”
and condenser tube cleaning by “Bruch Inset Cleaning Method” is very difficult. Especially, it is
considered that argument about theoretical justification for advanced set values is required till just
before of methodology is authorized.
● Set of default values
Thermal insulation installation by “Overwrapping Insulation Method”
■ Boiler efficiency at the thermal power plants
The most conservative value (boiler efficiency = 1.0). It is not required to mention about
justification.
■ CO2 emissions factor of coal
Default value of lignite described in “2006 IPCC Guidelines for National Greenhouse Gas
Inventory” (0.101tCO2/GJ)
■ Pump efficiencies for fire-fighting water pump and drainage pump
The most conservative values (pump efficiency = 0.9). Pomp efficiency is determined as not over
90% in the “handbook for thermal and nuclear power engineer” issued by thermal and nuclear power
engineering society.
■ Three-phase induction motor efficiencies of fire-fighting water pump and drainage pump
The most conservative value (motor efficiency = 1.0). It is not required to mention about
justification.
Condenser tube cleaning by “Brush Inset Cleaning Method”
■ CO2 emissions factor of electricity supplied to the electricity grid at the thermal power plant (CO2
emissions factor of internal power at the thermal power plant) (EFCO2,elec-ih)
It is calculated from coal consumption per electricity unit supplied to the electricity grid at the
thermal power plants described in energy statistics in Mongolia (Mongolia Energy Regulation
Authority) (g/kWh) and default values of CO2 emissions factor of “Lignite” according to “2006
IPCC Guidelines for National Greenhouse Gas Inventory” at present(0.101tCO2/GJ)
● Set value in advance:
Thermal insulation installation by “Overwrapping Insulation Method”
■ Average of mass enthalpy of superheated steam at inlet/ outlet point of main steam pip
To calculate (weighted by mass flow rate of superheated steam) average of mass enthalpy of
superheated steam at inlet/ outlet point of main steam pipe during a year after insulation installation
■ Average surface temperature and emissivity at expected insulation area in the heat/ power supply
facilities before insulation installation
These parameters are measured as a time of sampling by using an infrared thermography and a
thermocouple before insulation installation.
Emissivity at surface of existing facilities is approximate 0.9 and not much varied. Then it is set as
0.01 more of value for the main steam pipe and 0.01 less of value for other heat/ power supply facilities
considering conservativeness in calculation of emission reduction.
■ Ambient temperature around heat/ power supply facilities before insulation installation
Outdoor air temperature in Mongolia is much varied and influence indoor air temperature of the
thermal power plant. Ambient temperature around heat/ power supply facility is measured by a
thermometer several times before insulation installation considering seasonal variation or outdoor air
temperature. It is supposed that outdoor air temperature is provided by Mongolia Institute of
Meteorology and Hydrology. The ambient temperature is set as 0.05deg C more of value for the main
steam pipe and 0.05 less of value for other five facilities to secure conservativeness at present.
■ Surface heat conductivity rate for convection on mains steam pipe
。Indoor condition of value is set because all the heat/ power supply facilities are inside of building
of the thermal power plant. The maximum value of vertical piping (6.0 W/m2/K) is undertaken
considering conservativeness.
Condenser cleaning work by “Brush Inset Cleaning Method”
■ Reference water consumption of turbine i during a time of condenser cleaning work.
To set it from water consumption (of fire-fighting pump) of condenser tube cleaning by
“Conventional Cleaning Method” during shutdown of turbine unit before start of project.
For each turbine of the thermal power plant, performs measurement in integrating flow-meter
cleaning water of the tube of 5, from a conservative point of view, as water consumption per one of
turbine i is set to the project prior to the start of this minimum value at least.
■ Total head of the fire-fighting water pump and drainage pump
Total head of pump is sum of discharge pressure and suction pressure. Value on the nameplate can
be used for discharge pressure. It is difficult to secure conservativeness for calculation of suction
pressure. And the suction pressure is not considered to secure conservativeness for the total pressure
as an advanced set value.
■ Number of condenser water boxes of turbine i and tubes per a condenser water box of turbine i
They are the parameters to be set from specification of facilities or nameplate.
c. Calculation of GHG emissions (including reference and project emissions)
Installation of thermal insulation by “Overwrapping Insulation Method (ECO-AIM)”
The emission reductions are calculated with the following equations;
ERy= ERmpd,y+ERboiler,y+ ERturbine,y y+ ERhpfwh,y+ ERlpfwh,y+ ERbfwp,y
ERmsp,y=QSAVmsp,y,/boiler*EFCO2,coal
QSAVmsp,y,=FSmsp-out,y*(hAVEmsp-in,BWhAVEmsp-out,BWhAVEmsp-in,AW+hAVEmsp-out,AW)
ERboier,y=SHREcsvboiler*AHEboiler,y*EFCO2,coal*10-6
*8760/3.6
ERturbine,y=SHREcsvturbine*AHEturbine,y /boiler*EFCO2,coal*10-6
l*10-6
*8760/3.6
ERhpfwh,y=SHREcsvhpwsh*AHEhpfwh,y*EFCO2,coal*10-6
*8760/3.6
ERlpfwh,y=SHREcsvlpwsh*AHElpfwh,y*EFCO2,coal*10-6
*8760/3.6
ERbfwp,y=SHREcsvbfwp*AHEbfwp,y*EFCO2,coal*10-6
*8760/3.6
ERy Emission reductions in a year y tCO2/y
ERmsp,y Emission reductions due to thermal insulation effect on main steam pipe
in a year y
tCO2/y
ERboiler,y Emission reductions due to thermal insulation effect on boiler in a year y tCO2/y
ERturbine,y Emission reductions due to thermal insulation effect on turbine in a year
y
tCO2/y
ERhpfwh,y Emission reductions due to thermal insulation effect on high pressure
feed-water heater in a year y
tCO2/y
ERlpfwp,y Emission reductions due to thermal insulation effect on low pressure
feed-water heater in a year y
tCO2/y
ERbfwp,y Emission reductions due to thermal insulation effect on boiler
feed-water pipe in a year y
tCO2/y
QSAVmsp,y Heat quantity of superheated steam in main steam pipe saved by
thermal insulation installation in a year y GJ/y
FSmsp-out,y Total mass flow rate of superheated steam at outlet point of main steam
pipe in a year 10
3 ton/y
hAVEmsp-in,AW Weighted (by mass flow rate of superheated steam) average of mass kJ/kg
enthalpy of superheated steam at inlet point of main steam pipe during
one year after installation
hAVEmsp-out,A
W
Weighted (by mass flow rate of superheated steam) average of mass
enthalpy of superheated steam at outlet point of main steam pipe during
one year after installation
kJ/kg
hAVEmsp-in,BW
Weighted (by mass flow rate of superheated steam) average of Mass
enthalpy of superheated steam at inlet point of main steam pipe during
one year before installation
kJ/kg
hAVEmsp-out,B
W
Weighted (by mass flow rate of superheated steam) average of Mass
enthalpy of superheated steam at outlet point of main steam pipe during
one year before installation
kJ/kg
SHREmesmsp Specific thermal insulation effect per installation area on main steam
pipe by thermal insulation installation (based on actual measurement of
steam heat quantity)
W/m2
SHREcsvboiler Specific thermal insulation effect per installation area on boiler by
thermal insulation installation (identified in conservative manner)
W/m2
SHREcsvturbin
e
Specific thermal insulation effect per installation area on turbine by
thermal insulation installation (identified in conservative manner)
W/m2
SHREcsvhpfwh Specific thermal insulation effect per installation area on high pressure
feed-water heater by thermal insulation installation (identified in
conservative manner)
W/m2
SHREcsvlpfwh Specific thermal insulation effect per installation area on low pressure
feed-water heater by thermal insulation installation (identified in
conservative manner)
W/m2
SHREcsvbfwp Specific thermal insulation effect per installation area on boiler
feed-water pipe by thermal insulation installation (identified in
conservative manner)
W/m2
AHEmsp,y Thermal insulation installation area on main steam pipe by the project
in a year y
m2
AHEboiler,y Thermal insulation installation area on boiler by the project in a year y m2
AHEturbine,y Thermal insulation installation area on turbine by the project n a year y m2
AHEhpwsh,y Thermal insulation installation area on high pressure feed-water heater
by the project n a year y
m2
AHElpwsh,y Thermal insulation installation area on low pressure feed-water heater
by the project n a year y
m2
AHEbfwp,y Thermal insulation installation area on boiler feed-water pipe by the
project n a year y
m2
boiler Boiler efficiency at the thermal power plant Fraction
EFCO2,coal CO2 Emission factor of coal tCO2/GJ
Calculated emission reduction at present (CHP-3 high pressure unit): 2,206tCO2/y.
The best calculation method is to estimate emission reduction as much as possible under excluding
overestimation. However to quantify reduction effect for this project activities is very difficult thus the
validity of quantification is just to secure conservativeness.
The quantification method for this methodology takes many factors to secure conservativeness as
follows therefore it is considered as a valid quantification method;
To take boiler efficiency as a default value as the most conservative 1.0 (actual value is less than 0.9).
Emissivity and ambient temperature as advanced or second monitoring period of set values are
defined as more conservative than average values so that emission reduction becomes lower.
Insulation effect of main steam pipe is quantified based on measurement of steam heat quantity.
Heat quantities of other heat/ power supply facilities are estimated values however they are estimated
by only the surface radiation emission of quantities (not considering convection emission) so that
conservativeness is secured.
Condenser tube cleaning by “Brush Inset Cleaning (Rakuchin Gun Device) Method”
REy=
k
i 1
(ECRE,i *Ntci,y)*EFCO2,elec-ih*10-3
ECRE,i=ECfwpRE,i+ ECdwpRE,i
ECfwpRE,i=ρw*g*QVcwRE,i*Hfwp / ηfwp /ηfwppip /3600
ECdwpRE,i=ρw*g*QVcwRE,i*Hdwp / ηdwp /ηdwppip /3600
PEy=
k
i 1
(ECPJ,i *Ntci,y)* EFCO2,elec-ih*10-3
ECPJ,i=ECfwpRE,i+ ECdwpRE,i
ECfwpPJ,i=ρw*g*QVcwPJ,i*Hfwp / ηfwp /ηfwppip /3600
ECdwpPJ,i=ρw*g*QVcwRP,i*Hdwp / ηdwp /ηdwppip /3600
PEy Reference emissions in a year y tCO2/y
ECPJ,i Reference power consumption per one condenser tube cleaning work
of turbine i at the thermal plant
kWh/a
turbine/time
Ntci,y Number of condenser tube cleaning work for turbine i at the thermal
plant in a year y times/y
EFCO2,elec-ih
Emissions factor of the net power supplied to the power grid by the
thermal power plant (CO2 Emissions factor of auxiliary power at the
thermal plant)
tCO2/MWh
ECfwpPJ,i
Reference (additional) power consumption of the fire-fighting
water pump per one condenser tube cleaning work for turbine i at the
thermal plant
kWh/time
ECdwpPJ,i Reference (additional) power consumption of the drainage pump per
one condenser tube cleaning work for turbine i at the thermal plant kWh/time
ECdwpRE,i
Reference (additional) power consumption of the fire-fighting
water pump per one condenser tube cleaning work for turbine i at the
thermal plant
kWh/time
ECdwpPJ,i Reference (additional) power consumption of the drainage pump per
one condenser tube cleaning work for turbine i at the thermal plant kWh/time
QVcwRE,i Reference water consumption of the fire-fighting water pump per one
condenser tube cleaning work for turbine i
m3/a
turbine/time
QVcwPJ,i project water consumption of the fire-fighting water pump per one
condenser tube cleaning work for turbine i
m3/a
turbine/time
Hfwp Total head of the fire-fighting water pump m
Hdwp Total head of the drainage pump m
ηfwp Pump efficiency of the fire-fighting water pump Fraction
ηdwp Pump efficiency of the drainage pump Fraction
ηfwppip Efficiency of three-phase induction motor for the pump during
operation of the fire-fighting water pump
Fraction
ηdwppip Efficiency of three-phase induction motor for the pump during
operation of the drainage pump
Fraction
ρw Water density(=1.0) kg/L
g Gravity acceleration(=9.8 m/sec2
Calculated emission reduction at present: 3tCO2/y (reference emission:5tCO2/y, project emission:
2tCO2/y)
It is quantified using power reduction effect of pumps and becomes very small value.
Effective heat drop (turbine efficiency) is expected to develop 0.5% in case 1% of degree of vacuum
is improved. Total generating end output power in year 2012 was 3,328.5GWh/y, so approximate
16,600MWh/y of generating power output can be obtained in case degree of vacuum is improved 1%
and it is corresponding to approximate 15,000tCO2/y of CO2 emission reduction
To precisely ascertain improvement rate of turbine efficiency from 1% of improvement of degree of
vacuum on condenser, It is required to analyze average value data per hour (degree of vacuum, inlet/
outlet temperature of cooling water, condenser drainage temperature, etc.) by the timed data near
rated load of turbine (There are some other factors except the degree of vacuum concerning effective
heat drop under the situation apart the rated load of turbine).
However those hourly average value data are not recorded, so it is not available to be verified.
Therefore effect of improvement on degree of vacuum is not available to be analyzed then not counted
on the emission reduction amount.
The best calculation method is to estimate emission reduction as much as possible under excluding
overestimation. However under such littleness of information (necessary monitoring is not performed)
in Mongolian power plants, the validity of quantification is just to secure conservativeness.
Pump efficiencies of fire-fighting water pump and drainage pump, three-phase induction motor
efficiencies of fire-fighting water pump and drainage pump the most conservative values defined as
default values are given the most conservative values. And conservation is secured for advanced ones
therefore the quantification is considered as valid.
(2) Development of JCM Project Design Document (PDD)
“Overwrapping Insulation Method (ECO-AIM)” and “Bruch Inset Cleaning (Rakuchin Gun Device)
Method”
Requirement for introduction of this JCM project is an infrared thermography, its set of
thermocouple, a thermometer for measuring ambient temperature and an integrating flowmeters for
measuring water consumption in condenser cleaning. And items which are measured by the thermal
power plants (flow rate of main steam, temperature, pressure, etc.) besides them.
It is planned that the infrared thermography and its set of thermocouple are from the devices
possessed by Nichias Corporation at present and QA/QC for the ones are implemented by the
requirement of JIS. The infrared thermography is yet new and not implemented calibration but it is
attached a traceability certificate and a test certificate. Nichias is skillful of operation and quality
control of the devices.
The flowmeters, thermometers and pressure gauges used in CHP-3 & CHP-4 have no test
certificates and calibrations are implemented. CHP-4 has a laboratory certificate for a calibration
party so internal calibration is implemented.
And CHP-3 is not a certification party so certification for measuring equipment is yearly
implemented by the institute of standards and measures. Kind of thermometer measuring ambient
temperature and integrating flowmeters measuring water consumption of condenser cleaning is not
yet determined. QA/QC for the flowmeters, thermometers, pressure gauges and thermometer for
ambient temperature is implemented by the thermal power plants complied with the requirement of
MNS.
In case measuring equipment has no test certificate, it can not obtain valid period if it is calibrated.
Data recorded by such measuring equipment are justified just after calibration result is verified as
good that is implemented after the monitoring period.
When the first calibration after the last day of monitoring period is implemented, bias of
measurement before adjustment is identified. Recorded data is valid as acceptable in case that the bias
is within the allowance (differed from each measurement equipment or industrial standard) regulated
by the industrial standard. If the bias excesses the allowance, the measuring equipment is the same as
under malfunction, then the measured data become nil (originally, the equipment must be replaced).
For example, in case the bias before calibration excesses the allowance level when the calibration
after monitoring, the equipment has been under malfunction (recorded data are nil) and calibration
was required earlier or the equipment was required to be replaced. In such case, uncertainly of
recorded data is not identified and correction for calculated emission reduction is not possible.
Thus, calibration that always conform the allowance level of applied industrial standard is
necessary. And when measuring equipment is getting old, earlier calibration or replacement is
required.
And measuring range is also important to control measuring equipment. It is required that the
measuring equipment which authorized wider measuring range is authorized as variation range is not
deviated by watching how much measured value is varied. In case the data that are deviated from the
authorized measuring range are occurred, the manufacture of the equipment can not guarantee the
recorded. It needs to take conservative measures for emission reduction or may be not counted in some
case.
It is planned to control measuring devices and equipment as each advanced bias does not excess the
allowance level in MNS or JIS at the time of calibration in this project. It is not only a simple matter to
introduce a technology of energy efficiency improvement but also such justified equipment controls is
a very important factor to Monolia which is under developing.
(3) Project development and implementation
a. Project planning
● It is assumed that finance is provided by Trade and Development Bank of Mongolia considering the
result of survey to CHP-3 & CHP-4 and Mongolia Ministry of Energy.
● 29 January 2014: Meetings were held with CHP-3 & CHP-4 and this FS was reported then the
minutes of meeting describing cooperation and support for Kanden plant Co., Inc. were signed.
1) June 2014: Implementation of following project planning study (planning):
● Plant efficiency improvement by means of sample installation of thermal insulation by
“Overwrapping Insulation Method (ECO-AIM)” at deterioration parts and support for MRV
activities in CHP-3
● Condenser efficiency improvement by means of “Brush Inset Cleaning Device (Rakuchin Gun
Device)” and support for MRV activities in CHP-4
2) June 2015 (after determination of finance for facilities): Implementation of following JCM
finance programme project:
● Installation of thermal insulation by “Overwrapping Insulation Method (ECO-AIM)” and
condenser efficiency improvement by “Brush Inset Cleaning (Rakuchin Gun Device) Method” and
support for MRV activities in CHP-3 & CHP-4
* April 2016 (at the time of start of monitoring): Start of operation
● From late July 2014 to the middle of November 2014: Technical committee in CHP-3 & CHP-4 and
science and technology committee in Mongolia Ministry of Energy. By the middle of December
2014: Agreement and conclusion as follows;
● The middle of November 2014: Agreement of international consortium with CHP-3 & CHP-4
● The middle of December 2014: Conclusion of contract with CHP-3 & CHP-4
b. MRV structure
Participants and roles on MRV for “Overwrapping Insulation Method (ECO-AIM)” installation in
CHP-3 and “Bruch Inset Cleaning (Rakuchin Gun Device) Method” in CHP-4 are generally agreed as
in the table below.
● Participants and roles on MRV for “Overwrapping Insulation Method (ECO-AIM)” installation in
CHP-3
Participant Role
First Deputy Director (Chief
Engineer)
Overall project management
Head of Technical of Strategy
Department
・Responsible for project planning, implementation and
reporting
Technical Strategy and Monitoring
Section
・Reporting support
・Finalization and check data for reporting
・Correspondence of validation/ verification
Production Department ・Monitoring for heat quantities, heat generation/ power
generation at key points
Heat control and Automation
Shop
・Control of measuring equipment/ device (flow meter,
pressure gauge, thermometer, infrared thermography)
Mongolian Agency for
Standardization
and Metrology
・Calibration of flow measuring equipment
Joint Committee ・Registration of JCM project, determination of amount
of credit issuance
Kanden Plant Co., Inc. ・Management for JCM project
Nichias Corporation ・Advisory for JCM project installation work control
Suuri-keikaku Co., Ltd., Climate
Experts Ltd., Japan Quality
Assurance Organization
・Support for MRV project activities
・ Support for environmental impact assessment/
consultation among interested parties
EEC Co., Ltd. (Local consultants) ・Data check and finalization for reporting
・Correspondence of validation/ verification
Third Party Entity Validation/ verification for PDD and monitoring report
● Participants and roles on MRV for “Bruch Inset Cleaning (Rakuchin Gun Device) Method”
installation in CHP-4
Participant Role
First Deputy Director (Chief
Engineer)
Overall project management
Head of Research & Development
Department
・Responsible for project planning, implementation and
reporting
Research & Development Section ・Reporting support
・Finalization and check data for reporting
・Correspondence of validation/ verification
Production Department ・Data collection for heat load of condenser
Joint Committee Registration of JCM project, determination of amount
of credit issuance
Kanden Plant Co., Inc. ・Management for JCM project
Suuri-keikaku Co., Ltd.,
Climate Experts Ltd.,
Japan Quality Assurance
Organization
・Support for MRV project activities
・ Support for environmental impact assessment/
consultation among interested parties
EEC Co., Ltd. (Local consultants) ・Data check and finalization for reporting
・Correspondence of validation/ verification
Third Party Entity Validation/ verification for PDD and monitoring report
c. Permission and authorization for the project
Required permissions and authorization for the project are shown in the table below.
Required permissions and authorizations
Item Authority Application Documents
1. Product
Pyrogel thermal insulation
material (non-asbestos
product) and sub-materials
Mongolian Customs B/L, Invoice, Country of origin
Infrared thermography
device
Ministry of Economy,
Trade and Industry
of Japan
Export permission (Ordinance
for export and trading control,
Appendix Table 1 10-(2), 10-(4))
“Brush Inset Cleaning
Device (Rakuchin Gun
Device)” and brush
(Polyethylene)
Mongolian Customs B/L, Invoice, Country of origin
Uninterruptible power
supply device
Mongolian Customs B/L, Invoice, Country of origin
* It is considered that thermal insulation installation by “Overwrapping Insulation Method
(ECO-AIM)” is executed as improvement work to existing facilities based on the low on
occupational safety and health thus approval by authorities is not required. However further
confirmation of the low or regulations on occupational safety and health in Mongolia is to be done
to make sure.
d. Japan’s contribution
Thermal insulation installation by “Overwrapping Insulation Method (ECO-AIM)” which is
patented by Nichias Corporation contributes to following points.
1) It is the method which does not require removing the existing thermal insulation materials. Thus it
can avoid scattering the harmful existing materials (asbestos, etc.) from the view of the
occupational safety and health.
2) New technology what is its easiness for installation due to the sheet –like shape of material thus
skilled workers are not required for the installation work is much expected by local parties
including local insulation installation companies.
3) Used thermal insulation material, Pyrogel XT, has 1/2 or less of thermal conductivity of thermal
performance comparing with conventional types of insulation material (perlite, calcium silicate,
etc.). Its low thermal conductivity contributes to its thin thickness and it gives to avoid much
increase of section area of facility in case installing over existing insulation. And the material
allows -40deg C to +650deg C of application temperature range so that it suits for thermal power
plants in Mongolia where is very cold.
Introduction of condenser tube cleaning using “Brush Inset Cleaning (Rakuchin Gun Device)
Method” which is developed by Kanden Plant Co., Inc. contributes to following points.
1) Work time for condenser tube cleaning is shortened thus shutdown duration of power supply unit is
shortened.
2) Numbers of operators for condenser tube cleaning are reduced thus effective relocation of operators
is available.
3) It is expected that removal rate of foreign bodies is very high thus deterioration of condenser
performance is prevented due to high level of degree of vacuum recovery.
4) Over 50% of water consumption (drainage) is reduced comparing with the conventional condenser
tube cleaning method using water and a long metal rod with a stainless steel brush.
5) Installation rain coat is not required because of no splashing of cleaning water. And reduction of
work load, efficiency and cleanliness are expected.
6) Handgun gives good operability. Safety functions and good controllability make work load lower
and no requirement for skilled workers.
e. Environmental integrity
The project activities are aimed for efficiency improvement in thermal power plants and give just
benefit as reduction of atmospheric pollution to surrounding or remote area thus negative effects
are not occurred. And facility improvement works give inconsiderable influence for environment
such as scaffolding works in very limited areas in the thermal power plants thus preventive
measures are not required.
Thermal insulation installation by “Overwrapping Insulation Method (ECO-AIM)” is the method
just to overwrap the existing thermal insulation and does not require removing the existing thermal
insulation materials. Thus it can avoid scattering the harmful existing materials (asbestos, etc.) from
the view of the occupational safety and health.
f. Sustainable development in host country
Implementation of thermal insulation installation using a thermal insulation material for
industrial use (10mm of Pyrogel XT) by “Overwrapping Insulation Method (ECO-AIM)” gives life
extension effect to facilities. Persistent use of thermal power plant facilities keeping necessary
capacity results saves additional social costs. Thus it contributes sustainable development of
Mongolia.
It is offered that thermal insulation installation by “Overwrapping Insulation Method
(ECO-AIM)” is expected to apply to other thermal power plants, heat supply companies or common
plants out of CHP-3 & CHP-4 by the chief of Mongolia Ministry of Energy.
It is offered to install the thermal insulation to one of eight units of boiler and belonged pipes and
give improvement of heat efficiency. Then the installation is enlarged to apply to other seven units in
case improvement is verified.
Introduction of “Brush Inset Cleaning (Rakuchin Gun Device) Method” gives reduction of water
consumption and power consumption of pumps and much improvement for work environment of
condenser tube cleaning. In case of Erdenet thermal power plants, degree of vacuum is dropped
from 95% to 85% one or two years after condenser tube cleaning implementation due to drop of
water purity.
Under such situation, introduction of “Brush Inset Cleaning (Rakuchin Gun Device) Method”
ensures to improve energy efficiency in whole power plants. Darkhan thermal power plant shows
very positive response that they requires implementation of demonstration of “Brush Inset Cleaning
(Rakuchin Gun Device) Method” and offers immediately purchase the device when the effect is
verified.
g. Toward project realization (planned schedule and possible obstacles to be overcome)
<Planned schedule>
● 29 January 2014: Meetings were held with CHP-3 & CHP-4 and the minutes of meeting on
agreement confirmed between Mongolian side and Japanese side were signed
● June 2014: Proposal for project planning study to GEC
● Plant efficiency improvement by means of sample installation of thermal insulation by
“Overwrapping Insulation Method (ECO-AIM)” at deterioration parts and support for MRV
activities in CHP-3
● Condenser efficiency improvement by means of “Brush Inset Cleaning Device (Rakuchin Gun
Device)” and support for MRV activities in CHP-4 (approximate 8 months of implementation
duration)
● November 2014: Agreement of international consortium with CHP-3 & CHP-4
● December 2014: Conclusion of contract with CHP-3 & CHP-4
● June 2015 (after determination of finance for facilities): Proposal for following JCM finance
programme project to GEC
● Installation of thermal insulation by “Overwrapping Insulation Method (ECO-AIM)” and
condenser efficiency improvement by “Brush Inset Cleaning Device (Rakuchin Gun Device)” and
support for MRV activities in CHP-3 & CHP-4 (approximate 8 months of implementation duration)
● April 2016 (at the time of start of monitoring): Start of operation
<Possible obstacles and proposed solutions>
Major possible obstacle and proposed solutions are mentioned as in following table.
No. Possible obstacle Proposed Solution
● Improving precision of surface
temperature calculation
It is identified that there are no useful
equipment for heat measuring in CHP-4 by
the survey, so GHG emission reduction is
not calculated in the methodology for
CHP-4. Only GHG emission reduction for
a represented unit in CHP-3 is calculated
as a result.
Quantification of radiation heat
Demonstration of sample installation of
thermal insulation by “Overwrapping
Insulation Method (ECO-AIM)” is
proposed as follows.
To install sample thermal insulation at
seriously deteriorated part of steam pipe
in CHP-3 and to measuring surface
temperature before/ after installation by
infrared thermographic scanning. Then to
calculate reduction of radiation heat
quantities was undertaken by means of
sampling measurement of surface
temperature, emissivity, etc. using infrared
thermography however it was not available
because forms of facilities, states of
surface, scales, conditions of emissive,
environmental condition, etc. are not
adequately found in CHP-3 & CHP-4 of
survey.
quantity at the part by reduction of the
surface temperature.
2. Demonstration for turbine efficiency
improvement and investigation of
reference emissions
Effective heat drop (turbine
efficiency) is expected to develop 0.5% in
case 1% of degree of vacuum is improved.
Total generating end output power in year
2012 was 3,328.5GWh/y, so approximate
16,600MWh/y of generating power output
can be obtained in case degree of vacuum
is improved 1% and it is corresponding to
approximate 15,000tCO2/y of CO2
emission reduction.
Plant efficiency analysis was undertaken
using data acquired from CHP-3 & CHP-4
however degree of plant efficiency
improvement was not proved because the
reliability of data were not confirmed.
To ensure reliability for data, it is
proposed to demonstrate degree of turbine
efficiency improvement and investigate
reference drainage by means of comparing
in project planning study of condenser
tube cleaning by “Brush Inset Cleaning
Method” comparing averaged data per
hour between “Conventional Cleaning
Method” and “Brush Inset Cleaning
Method”.