iea expert workshop the role of process integration for … · 2018-04-11 · epfl-sci-sti-fm...
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EPFL-SCI-STI-FM (IPESE) APRIL 2017 1
IEA Expert Workshop The Role of Process Integration for Greenhouse Gas Mitigation in Industry“PI in Industrial Clusters and Excess Heat: Large
Industrial Clusters”Prof François Marechal
Industrial Process and Energy Systems Engineering
EPFL Valais-Wallis
Switzerland
EPFL-SCI-STI-FM (IPESE) APRIL 2017 2
Impact of Energy system engineering
3 EXECUTIVE SUMMARY
step change in the rate of progress and broader engagement of the full range of countries, sectors and stakeholders.
ETP scenarios present options rather than forecasts
ETP 2010 analyses and compares various scenarios. This approach does not aim to forecast what will happen, but rather to demonstrate the many opportunities to create a more secure and sustainable energy future.
The ETP 2010 Baseline scenario follows the Reference scenario to 2030 outlined in the World Energy Outlook 2009, and then extends it to 2050. It assumes governments introduce no new energy and climate policies. In contrast, the BLUE Map scenario (with several variants) is target-oriented: it sets the goal of halving global energy-related CO2 emissions by 2050 (compared to 2005 levels) and examines the least-cost means of achieving that goal through the deployment of existing and new low-carbon technologies (Figure ES.1). The BLUE scenarios also enhance energy security (e.g. by reducing dependence on fossil fuels) and bring other benefits that contribute to economic development (e.g. improved health due to lower air pollution). A quick comparison of ETP 2010 scenario results demonstrates that low-carbon technologies can deliver a dramatically different future (Table ES.1).
Figure ES.1 � Key technologies for reducing CO2 emissions under the BLUE Map scenario
2010 2015 2020 2025 2030 2035 2040 2045 2050
Gt C
O2
05
1015202530354045505560
WEO 2009 450 ppm case ETP 2010 analysis
CCS 19%Renewables 17%Nuclear 6%
Power generation efficiencyand fuel switching 5%
End-use fuel switching 15%End-use fuel and electricityefficiency 38%
Baseline emissions 57 Gt
BLUE Map emissions 14 Gt
Key point
A wide range of technologies will be necessary to reduce energy-related CO2 emissions substantially.
Energy Technology Perspective 2010, International Energy Agency , 2010
EPFL-SCI-STI-FM (IPESE) APRIL 2017 3
Process Integration and CO2 mitigation
• Efficient energy and resources use and reuse • Efficient energy conversion • Integration of renewable energy resources • Large Scale and Complex System integration • Sustainable processes & Environmental impact
EPFL-SCI-STI-FM (IPESE) APRIL 2017 4
The challenge of the industry
Production [kg/y]
Intensity [MJ/y]
Energy [MJ/y]
Revenue [CHF/y]
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IPESEIndustrial Process and
Energy Systems Engineering
• Understanding the use of energy in industrial processes
Production Process
Energy is the driving force of the processes
ProductsRaw materials
Mass balance
Waste
Pumps Mixers Compressors Screws Conveyers
ElectricityEnergy balance
Heat
Cooling Refrigeration Freezing Condensation
Heating Evaporation Drying Distillation Reaction
HeatEnergy Audits
Characterising mass and energy flows
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IPESEIndustrial Process and
Energy Systems Engineering
Chaleur
Energy efficiency of the technologies
ProduitsRaw Materials
Déchets
Pompes Agitateur Compresseurs Malaxeurs Concasseurs
Electricity
Heat
Heat
Refroidisseur Réfrigération Congélation Condensation
Chauffage Evaporation Distillation Réaction
Insulation Compare (bench mark) New technologies Optimise operation Management
Efficiency Technology analysis
EPFL-SCI-STI-FM (IPESE) June 2015 ‹#›
• Interconnectivity (mass, heat, energy) • Emissions (Equipment, Emissions) • Cost (size => cost, maintenance)
The energy technology building block & interface
- Equipment sizing model - Cost estimation
Heat transfer requirement
Heat transfer
Thermo-chemical conversion Model
Material streamsProduct streams
ElectricityHeat transfer requirement
Water streamsWater streams
Waste streamsWaste streams
ElectricityUnit parameters
Decision Variables
Life cycle emissions
Life cycle of equipment - Production - Dismantling
MaintenanceInvestment cost
LCA models
LCA models
EPFL-SCI-STI-FM (IPESE) APRIL 2017 8
Defining Unit Operation heat exchange interfaces
Unit i Separation
Steam
Cooling water
Electricitiy
Condensate
Alternative Unit i
Process flows
Process flows
T
Q
Cold stream
Hot stream
Black box
grey box
white box
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IPESEIndustrial Process and
Energy Systems Engineering
Chale
Heat recovery
ProductsRaw Materials
Waste
Pompes Agitateur Compresseurs Malaxeurs Concasseurs
Electricity
Heat
T
Refroidisseur Réfrigération Congélation Condensation
T
HeatHeat exchange
Streams to be heated Streams to be cooled
Heating Evaporation Drying Distillation Reaction
Isolation Compare New technologies Optimise operation Management
Heat recovery savings : 30%
EPFL-SCI-STI-FM (IPESE) APRIL 2017 10
Heat exchange interface selection
• # of heat exchangers not modified vs operating cost
0 5 10 15 20 25#of streams in bbx[C]
0.6
0.8
1
1.2
1.4
1.6
1.8
Ope
ratin
g Co
st[E
uro/
y]
×106
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IPESEIndustrial Process and
Energy Systems Engineering
Heat revalorisation : accros the pinch
ProductsRaw Materials
Waste
Pompes Agitateur Compresseurs Malaxeurs Concasseurs
Electricity
Chauffage Evaporation Distillation Réaction
Refroidisseur Réfrigération Congélation Condensation
HeatHeat pumps
Change the temperature Level of waste heat
InvestmentHeat
Isoler Comparer Développer Optimiser Gérer
Heat pump + MVR : savings =75%
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IPESEIndustrial Process and
Energy Systems Engineering
Energy Conversion
ProductsRaw Materials
Waste
Chauffage Evaporation Distillation Réaction
Investment
Heat
• Combined heat and power • Steam cycles • Organic Rankine Cycles • Heat pumps • MVR • Waste conversion (Bio CH4)
Isoler Comparer Développer Optimiser Gérer
Electricity
Cogeneration
Fuel
Heat
Convert the fuel you buy into useful energy for the process
Plant Wide Process Integration methodology
3. Heat recovery
4. Heat pumping 6. Combined heat and power
2. Process units integration 7. Heat exchanger network5. Site scale integration
1. Process energy audits
Energy audits Define the energy needs
New technologies Separation Discontinuous vs continuous
8. Profitability analysis
Optimisation optimised operating conditions Mass and heat integration
E. M. Méchaussie, S. L. Bungener, F. Maréchal, V. Eetvelde, and G. Martha, “Methodology for streams definition and graphical representation in Total Site Analysis,” presented at the 29th International Conference on Efficiency, Cost, Optimisation, Simulation and Environmental Impact of Energy Systems (ECOS), 2016. N. Pouransari, “Towards practical solutions for energy efficiency of large-scale industrial sites,” EPFL, Switzerland, 2015. N. Pouransari, G. Bocquenet, and F. Maréchal, “Site-scale process integration and utility optimization with multi-level energy requirement definition,” Energy Convers. Manag., vol. 85, pp. 774–783, Sep. 2014. N. Pouransari and F. Maréchal, “Heat exchanger network design of large-scale industrial site with layout inspired constraints,” Comput. Chem. Eng., vol. 71, pp. 426–445, 2015. N. Pouransari and F. Maréchal, “Heat recovery networks synthesis of large-scale industrial sites: Heat load distribution problem with virtual process subsystems,” Energy Convers. Manag., vol. 89, pp. 985–1000, Jan. 2015.
0
1 0
20
30
40
50
60
LLDPE Polymer EthylAcetate Phenol EO & EG Butadiene
CO2 Savings in %
Project 1 Project 2 Project 3 Project 4 Project 5 Project 6 Remaining
CO2 mitigation results (chemical industry)
CO2 emissions 100 kt/y
15 Projects realised in collaboration with industry
Polymer 1 Polymer 2 Chemical 1 Chemical 2 Chemical 3 Chemical 4
EPFL-SCI-STI-FM (IPESE) APRIL 2017 15
Fuel Cell System design and PI
CO2
E
CH4
O2
Facchinetti, M, Daniel Favrat, and Francois Marechal. “Sub-atmospheric Hybrid Cycle SOFC-Gas Turbine with CO2 Separation.” PCT/IB2010/052558, 2011.
E
H2O
O2 Products :Electricity :80 %CO2 capturedH2O
Heat : 20%
Air
Facchinetti et al.: Innovative Hybrid Cycle Solid Oxide Fuel Cell-Inverted Gas Turbine with CO2 Separation
fuel cell and thus reduced fuel cell cooling requirement.Indeed, the optimal HCP fuel cell air excess decreases withthe pressure ratio (Figure 4). HCox and HCair are character-ized by a nearly constant steam to carbon ratio and fuel cellair excess.
The cathodic turbine pressure ratio remains nearly con-stant for HCox while decreases slightly for HCair withrespect to the anodic pressure ratio (Figure 5).
Figure 6 displays the relation between the pressure ratioand the anodic and cathodic compressor inlet temperatures.Anodic and cathodic compressor inlet temperatures of HCair
are minimized in order to reduce the compression work.The compressor inlet temperatures of HCox are slightlyhigher than the lower limit of the range. This is due to thelow temperature heat load required by the system energyintegration.
Corrected composite curves of optimal solutions, charac-terized by the same pressure ratio, are compared inFigures 7–9. The decision variables describing those solutionsare presented in Table 2. The corrected composite curvesrepresent the relation between corrected temperature!T±!DT min!2"" and the heat load specific to the power output.
/ -
/ -
Fig. 3 Pressure ratio vs. steam to carbon ratio with max TIT = 1,573 K.
/ -
/ -
Fig. 4 Pressure ratio vs. fuel cell air excess with max TIT = 1,573 K.
/ -
/ -
Fig. 5 Pressure ratio vs. cathodic turbine pressure ratio with maxTIT = 1,573 K.
/ K
Fig. 6 Pressure ratio vs. compressor inlet temperature with maxTIT = 1,573 K.
/ K
Fig. 7 HCox composite curves of optimal solution with p = 3 and maxTIT = 1,573 K.
Table 2 Decision variables for optimal solutions p = 3 and maxTIT = 1,573 K.
Variables HCox HCair HCP
nsc 1.35 1.30 1.65Tsr [K] 1,065 1,073 1,071Tfc [K] 1,072 1,073 1,073k 3.3 2.6 2.6l 0.8 0.8 0.8p 3 3 3pcathode 2.9 3.0 –Tic cathode [K] 299 298 –Tic anode [K] 304 298 –
ORIG
INAL
RES
EARCH
PAPER
6 © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim FUEL CELLS 00, 0000, No. 0, 1–8www.fuelcells.wiley-vch.de
SOFC
François Maréchal (IPESE-EPFL) April 2017 16
The green boiler
Production SNG
WOOD 100 MWth, dry
67.5 MW SNG
CO2
INVESTMENT 86 Million USD
16.8 MW Waste heat
(108 kg CO2 avoided / MWh wood)
1.4 MW net electricity
• Co production of biofuel from wood
• Synthetic natural gas, methanol, DME, F-T fuels
• CO2 capture
• Exothermic => Heat supply
• Cogeneration of Heat
With market price of WOOD (40$/MWh) and NG (65 $/MWh) and with CO2 taxes (80 CHF/ton), also for capture 8000 hours/year of operation
COST OF HEAT 3.2 M$/year (-6.1 M$/year) 25 $/MWh (- 47 $/MWh)
EPFL-SCI-STI-FM (IPESE) APRIL 2017 17
Green boiler and RES storage
Production SNG
WOOD 100 MWth, dry
67.5 MW SNG
CO2
16.8 MW Waste heat
(108 kg CO2 avoided / MWh wood)
1.4 MW net electricity
Production SNG
WOOD 100 MWth, dry
170 MW SNG
37 MW Waste heat
Electricity 145 MWth, dry
H2 123 MWth, dry
38 MW Useful heat
François Maréchal (IPESE-EPFL) April 2017 18
CC & GCC of aluminium production process
Preheating Cooling
solidification
melting
Al Mould
High temperature pinch Combustion Air preheating Low temperature waste heat
François Maréchal (IPESE-EPFL) April 2017 19
System integration
Production SNG
ε=68.2%
WOOD 100 MWth, dry
67.5 MW SNG
CO2
INVESTMENT 86 Million USD
16.8 MW Waste heat
(108 kg CO2 avoided / MWh wood), no sequestration
1.4 MW net electricity
Integrating renewable energy sources
Motivation ■ RENEWABLE ENERGY AND INDUSTRY ■ Developing methods for sizing solar and heat pumping systems and
corresponding storage, considering time variations, process integration and investment cost.
■ Discover and elaborate synergies and competing aspects of such technologies.
Solar heat & heat pumping integrationMethods
Data collection Optimal sizing & operation
Post Computational
analysis
➢ Heat pump superstructure
➢ investment costs estimations ➢ CO2 eq emissions
➢ min TAC TAC = OPEX + CAPEX Optimization with multi-period (MILP) inc. storage
➢ Meteorological data clustering
➢ Process data
➢ Solar components & storage
2,ngGRID GRID,in BOI BOI2,tot 2,el ref BOI
1
COCO E + Q t occ
fp p p pp
CO u u=
⎞⎛= ⋅ ⋅ ⋅ ⋅ ⋅ Δ ⋅⎟⎜
⎝ ⎠∑P
Solar only
Ref+Solar ∑=19.1 kWh/traw
3.8 m2/0.01traw
Results : multi-period evaluation
Heatpump only
Ref+HPS 24 kWh/traw
combined
2.1 m2/0.01traw
Ref+HP+Solar ∑=10.1 kWh/traw
Natural gas 8.1 ct€/kWh
Grid electricity 14.2 ct€/kWh
Results : CO2 mitigation and costs
23
Max. heat recovery ⇒ Pinch analysis ⇒Optimizing the
HEN
Heat pumping
solar + heat pumping
Photovoltaic Electricity (150€/m2) 2'245m2 ! 2.38m2/unit
Flat plate thermal Heat (300€/m2) 1'369m2 !1.45 m2/unit
Flat plate + PV Hybrid Low efficiency
HCPVT Hybrid (500€/m2) High efficiency 1'988m2! 2.10m2/unit
Daytime process operationTAC = OPEX + ann(CAPEX)
Solar only
A. S. Wallerand, R. Voillat, and F. Maréchal, “Towards optimal design of solar assisted industrial processes: Case study of a dairy,” Proc. ECOS 2016, 2016
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IPESEIndustrial Process and
Energy Systems Engineering
Industrial symbiosis
Chauffage Evaporation Distillation Réaction Products
Raw Materials
Heat
Use the heat for another purpose ?
Use the waste for another purpose ?
Waste
HeatElectricity
Cogeneration
Fuel
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2012
IPESEIndustrial Process and
Energy Systems Engineering
• Looking at synergies …
Industrial symbiosis
Chauffage Evaporation Distillation Réaction
Cogeneration
Products
Raw Materials WasteIndustrial site
Products
Heat
Heat
Sharing resources & material flows Cascading Heat Sharing Equipments Waste Management
Electricity
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2012
IPESEIndustrial Process and
Energy Systems Engineering
• Looking at synergies …
Industrial symbiosis
Electricity
Chauffage Evaporation Distillation Réaction
Cogeneration
Industrial site
Heat
Heat
Reforming
Synthesis
Polymers
Separation
Steel Glass
Cement
Minerals
Food
Greenhouses
Aluminium
Fine chemicals
Cracking
T Cross sectors
27
Industrial site analysis
Single Process Integration
Black-box
System A
28
Single Process Integration
Black-box Simple model
System A
Industrial site analysis
29
Single Process Integration
Black-box Simple model
Black-box
System B
System A
Industrial site analysis
30
Single Process Integration
Black-box Simple model
Black-box Detailed model
System B
System A
Industrial site analysis
31
Single Processes Integration
Black-box Simple model
Black-box Detailed model
System C
System B
System A
Industrial site analysis
All Process Total hot utility bill
Current 100 % (Base)
SP Integrated 70 %
32
Single Process Integration Total Site IntegrationI. All the units represent by Black-Box analysis
Black-box Simple model
Black-box Detailed model
System C
System B
System A
Industrial site analysis
33
Single Process Integration Total Site IntegrationI. All the units represent by Black-Box analysis
II. System A upgrades by Simple-Model analysis
Black-box Simple model
Black-box Detailed model
System C
System B
System A
Industrial site analysis
34
Single Process Integration Total Site Integration
III. System B upgrades by Detailed-Model analysis
I. All the units represent by Black-Box analysis
Black-box Simple model
Black-box Detailed model
System C
System B
System A
II. System A upgrades by Simple-Model analysis
Industrial site analysis : choosing the interfaces
35
Case study: TSI vs SPI with multi-layer data extraction, The site with A, B and C systems
Single Process Integration Total Site IntegrationI. All the units represent by Black-Box analysis
Black-box Simple model
Black-box Detailed model
System C
System B
System A
All Process P-P heat exchanger Reduction of consumption Total hot utility bill
Current 32 % - 100 % (Base)
SP Integrated 55 % 23 % 70 %
TS Integrated 62 % 30 % 63 %
III. System B upgrades by Detailed-Model analysis
II. System A upgrades by Simple-Model analysis
36
Case study: Heat recovery improvement options with TSI
Process modification: Increasing the pressure, ΔP= 0.35 bar
TSI
All Process Hot utility requirement Heat recovery Reduction of consumption Total hot utility bill
Current 100 % 32 % - 100 % (Base)
TS Integrated 70% 62 % 30 % 63 %
62% 50%
37
Case study: Heat recovery improvement options with TSI
Process modification: Increasing the pressure, ΔP= 0.4 bar
All Process Reduction of consumption Total hot utility bill
Current - 100 % (Base)
TS Integrated 30 % 63 %
Press.Inc Integrated 38 % 52 %
Increased Pressure
62% 50%
72% 42%
38
Case study: Heat recovery improvement options with TSI
Advance technology: Integration of MVR and HP, two stage MVR
TSI
All Process Reduction of consumption Total hot utility bill
Current - 100 % (Base)
TS Integrated 30 % 63 %
62% 50%
39
Case study: Heat recovery improvement options with heat pumping
Advance technology : Integration of MVR and HP, two stage MVR
All Process Reduction of consumption Total hot utility bill
Current - 100 % (Base)
TS Integrated 30 % 63 %
MVR & HP Integrated 53 % 45 %
MVR & HP Integrated
62% 50%
99% 27%
Mechanical power= 6%
40
Case study: Energy conversion units integration & optimization
Utility options: Boiler, CHP (Gas turbine and Steam network), Refrigeration cycle
Balanced electricity production/Equivalent kJ of current natural gas consumption
TSI
Current Site TSI
Heat requirement [%] 100 70
Relative Natural Gas [-] 1.0 1.08
Relative balanced Electricity [-] 0 0.33
Relative total cost 1.0 0.78
41
Case study: Energy conversion units integration & optimization
Utility options: Boiler, CHP (Gas turbine and Steam network), Refrigeration cycle
Balanced electricity production/Equivalent kJ of current natural gas consumption
TSI Increased pressure
Current Site TSI TSI Press.Inc
Heat requirement [%] 100 70 62
Relative Natural Gas [-] 1.0 1.08 0.92
Relative balanced Electricity [-] 0 0.33 0.25
Relative total cost 1.0 0.78 0.72
42
Case study: Energy conversion units integration & optimization
Utility options: Boiler, CHP (Gas turbine and Steam network), Refrigeration cycle
Balanced electricity production/Equivalent kJ of current natural gas consumption (Gn cost/El Cost=0.8) Total incl. investment
TSI Increased pressure MVR & HP Integration
Current Site TSI TSI Press.Inc TSI Intg.MVR & HP
Heat requirement [%] 100 70 62 47
Relative Natural Gas [-] 1.0 1.08 0.92 0.60
Relative balanced Electricity [-] 0 0.33 0.25 0.09
Relative total cost 1.0 0.78 0.72 0.70
Mechanical power= 6%
EPFL-SCI-STI-FM (IPESE) APRIL 2017 43
Industrial symbiosis
• Looking at synergies …
Electricity
Chauffage Evaporation Distillation Réaction
Cogeneration
Products
Raw Materials WasteIndustrial site
Products
Heat
Heat
Sharing resources & material flows Cascading Heat Sharing Equipments Waste Management
EPFL-SCI-STI-FM (IPESE) APRIL 2017 44
Local heat recovery
-20
0
20
40
60
80
0 50 100 150 200 250 300 350 400
T(C
)
Q(kW)
AirWaste Water
Heating Hot water
recoveryRecoverable
Heat requirement
EPFL-SCI-STI-FM (IPESE) APRIL 2017 45
Buildings and efficiency
• Definition of the energy requirements
• Heating
• Air renewal
• Hot water
• Waste Water
• Air renewal
Tw Twmin
TrTs
Refurbishment up to 66%
Do not forget Carnot (Exergy demand) : * Heat with the lower possible temperature * Cool with the highest possible temperature
Heating temperature
EPFL-SCI-STI-FM (IPESE) APRIL 2017 46
Multi-period problem
Buildings : 35 % of the final energy demand Industry : 29 % of the final energy demand
EPFL-SCI-STI-FM (IPESE) APRIL 2017 47
Local Heat pumping on building waste heat
-20
0
20
40
60
80
0 50 100 150 200 250 300 350 400
T(C
)
Q(kW)
AirWaste Water
Heating Hot water
recoveryRecoverable
Heat requirement
20 kWe
Heat pumping on water supply ?
COP = Heat/Elec = 5 to 6
Heat pumping on waste water - Heat exchange - Heat storage - Water storage
EPFL-SCI-STI-FM (IPESE) APRIL 2017 48
Integrating the demand : the whole region
0 200 400 600 800 1000 12000
10
20
30
40
50
60
70
80
Required Thermal Power Q [MW]
Tem
pera
ture
[°C]
2030
Summer
Mid-Season Winter
-6°C Minimum power requirement for heating and hot water production (Mid-Season)
Minimum cooling power requirement
2005Scenarios:
Cooling range
4.3. Period dependent requirements using Q–T composites
The time scale is first decomposed into a limited number ofrepresentative periods (P). The definition of the periods depends onthe design problem to be solved. In the case of urban planning, thevariation of temperatures may be compensated by the uncer-tainties of the data and a multi-period analysis is made over threeperiods (winter, mid-season and summer) as shown in Fig. 6. Whena more detailed model is needed, for example for the design ofdistrict network [13], the integration of solar heat or when storagetanks have to be designed, a higher number of periods like typicaldays representation [4] should be applied. The building modelbeing defined as a function of the outdoor and room temperature,any time discretization may be applied as soon as the buildingmodel remains valid, e.g. the building structure inertia is not rele-vant. Considering the building dependent threshold temperatures,a typical mean temperature Theat
ext;P;c is associated with each building/category. This is done for each period using equation (11), andsimilarly for the cold requirement.
Theatext;P;c ¼ min
0
BBBBBB@
Z
t˛P:Text<Theattr;c
TextðtÞdt
Z
t˛P:Text<Theattr;c
dt; Theat
tr;c
1
CCCCCCA(11)
Using the heating signature (3), the hot/cold mean power ð _QjP;zÞ is
computed for each period (P) by equations (12) and (13) (seeTable 3). The sum over the different types of buildings defines therequired power of a given area. The equivalent operating time (DP)of the period for the area is defined as the energy/power ratio (14).
_QhotP;z ¼
Xnc
c¼1
!kheat
1c$Theat;ext
P;c þ kheat2cþ _qhw
c
"$Ac;z (12)
_QcoldP;z ¼
Xnc
c¼1
!kcool
1c$Tcool;ext
P;c þ kcool2c
"$Ac;z (13)
DjP ¼
QjP
_QjP
; j :¼ hot; cold (14)
Considering the list of buildings in a given area and applyingprocess integration techniques [14], it is possible to compute theheat–temperature composite curves ðð _Qk; TkÞP ; k ¼ 1;.;nk þ 1Þz,that defines in each zone the net hot/cold services to be delivered ina typical period. The heat cascade integrates the hot waterproduction, the heating and the cooling requirements of all the
intT Q
supplyT returnT
mcpextT
Fig. 4. Heat exchange of the domestic hydronic system.
20253035404550556065707580
Dis
trib
utio
n t
em
pe
ra
tu
re
s [
°C
]
-12 -10 -8 -6 -4 -2 0 2 4 6 8 10 12 14 16Text [°C]
25.523.6
21.820.0
18.216.4
14.512.7
10.99.1 7.3 5.5 3.6 1.8 0
q [W/m2]
Supply curveReturn curve
Design points
Fig. 5. Example of heating distribution curves sized at 65/50 %C for Text, 0¼&6 %C.
Summer Mid-Season
WinterMid-Season
Te
xt [
°C
]
Fig. 6. Outdoor temperature in Geneva (2005) and periods definition.
Table 3Heat power requirements _qP;c for residential and administrative buildings.
Category Heating [W/m2] HW [W/m2] Cooling [W/m2]
Summer Mid-season
Winter Annual Summer Mid-season
Winter
Resid1 3.71 11.29 27.72 6.26 0.00 0.00 0.00Resid2 4.27 12.68 30.86 6.26 0.00 0.00 0.00Resid3 3.98 12.05 29.51 6.26 0.00 0.00 0.00Resid4 2.89 8.56 21.25 6.26 0.00 0.00 0.00Resid5 1.33 3.83 9.58 6.26 0.00 0.00 0.00Resid6 0.89 2.62 6.60 6.26 0.00 0.00 0.00Resid7 1.18 3.46 8.69 6.26 0.00 0.00 0.00Resid8 1.75 5.13 12.83 6.26 0.00 0.00 0.00Resid9 1.62 4.66 11.66 6.26 0.00 0.00 0.00Resid10 1.85 5.38 13.42 6.26 0.00 0.00 0.00Admin1 3.73 10.99 27.64 2.09 0.00 0.00 0.00Admin2 3.72 10.97 27.60 2.09 0.00 0.00 0.00Admin3 3.96 11.44 28.60 2.09 7.77 4.95 0.00Admin4 3.35 9.88 24.92 2.09 11.30 7.19 0.00Admin5 1.92 5.50 14.13 2.09 15.00 9.55 0.00Admin6 1.55 4.39 11.36 2.09 16.55 10.53 0.00Admin7 1.76 5.15 13.30 2.09 15.36 9.78 0.00Admin9 2.30 6.72 17.15 2.09 15.39 9.79 0.00Admin0 2.19 6.29 16.06 2.09 16.29 10.37 0.00Admin10 2.41 6.95 17.69 2.09 15.07 9.59 0.00
L. Girardin et al. / Energy 35 (2010) 830–840 835
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Labo
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2012
IPESEIndustrial Process and
Energy Systems Engineering
Industrial symbiosis and district heating
• Multi-period process integration problem : MILP problem inc. storage management
Electricity
Chauffage Evaporation Distillation Réaction
Cogeneration
Products
Raw Materials WasteIndustrial site
Products
Heat District Heating
Heat
Sharing resources & material flows Cascading Heat Sharing Equipments Waste Management
0 200 400 600 800 1000 12000
10
20
30
40
50
60
70
80
Required Thermal Power Q [MW]
Tempe
rature
[°C]
2030
Summer
Mid-Season Winter
-6°C Minimum power requirement for heating and hot water production (Mid-Season)
Minimum cooling power requirement
2005Scenarios:
Cooling range
EPFL-SCI-STI-FM (IPESE) APRIL 2017 50
PI for Waste management integration
Ecole Polytechnique Fédérale de Lausanne
T
40°C
15 °C
5 °C
-5 °C
Data centersAir conditionning
Hot waterHeating
RefrigerationLake CO2Liquid Gas
80°C
Waste water
CH4
CO2
Industrial waste heat
Electricity
Suciu et al. , Ecos Proceedings, 2016
NEW PARADIGME : LOW T DISTRICT SYSTEM
Electrical grid
Solar PV
Bio-waste multi-energy grids
EPFL-SCI-STI-FM (IPESE) APRIL 2017 52
Conclusions : PI & Large scale integration
• Do not sell your inefficiency ! • Efficiency is the hidden fuel for CO2 mitigation
• and PI reveals the system efficiency • Energy conversion
• Heat revalorisation => heat pumps
• Combined Heat and Power • Combined Fuel and Power
• Integrate renewable energy sources
• Multi-period problems • Storage
• Large system integration • District heating
• Energy management
• Take actions at the system level • Identify targets
• Evaluate paths for implementation
• Find economic evaluation
Energy section of EFCE in preparation
Chair and Co-ChairF. Marechal (EPFL, CH) & Fabrizio Bezzo (UnPd, IT)
Chair
WP representativesSections representative
Fuels
Chair
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Biomass
Chair
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CO2
Chair
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Hydrogen
Efficiency
WP representativesSections representative
Chair
Conversion
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Chair
WWE Nexus
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Chair
Chair
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Storage
CAPESep. Thermo.
Memb.
Drying
CAPE
Sep.Thermo. Memb.
Electro-chemReaction
Reaction
Sust.
Sust.
Energy in chemical engineering
Chemical engineering in Energy