ENERGY EFFICIENCY
IMPROVEMENT IN LIGHT
COMMERCIAL REFRIGERATION
SYSTEMS
CASE STUDIESMarek Zgliczynski
INTRODUCTION
As a consequence of Global Warming concerns, the European Community has already decided to take
actions to phase out high GWP refrigerants, due to their contribution to green-house effect. F – Gases Regulation to be voted on June 19,
2013
F – Gases Regulation to be voted on June 19, 2013
F – GASES EUROPEAN DIRECTIVE
Annex III – Table 1Placing on the market prohibitions referred to in Article 9 (1)
Products and equipmentDate of prohibition
(Commission proposal)
3 Use of fire protection systems and fire extinguishers that contains HFC23 1 January 2015
10 Domestic refrigerators and freezers that contain HFC with GWP higher than 150 or more
1 January 2015
11 part 1
Refrigerators and freezers for storage, display or distribution of products in retail and food service ("commercial use") - hermetically sealed systems that
contains HFC with GWP o 2500 or more1 January 2017
11 part 2
Refrigerators and freezers for storage, display or distribution of products in retail and food service ("commercial use") - hermetically sealed systems that
contains HFC with GWP of 150 or more1 January 2020
12 Movable room air-conditioning appliances (hermetically sealed equipment which is movable between rooms by the end user) contains HFC with GWP of 150 or more
1 January 2020
R134a
R404AR507
R134a, R407F, R407C, R410A, etc
Domestic refrigerators and freezers that contain HFC
Date of prohibition
(Amendment)
Refrigerators and freezers for storage , display or distribution of products in retail and food service ("commercial use")-
hermetically sealed systems that contains HFCs with GWP of 2150 or more
1 January 2015
Refrigerators and freezers for storage , display or distribution of products in retail and food service ("commercial use")-
hermetically sealed systems that contains HFCs
1 January 2018
EMBRACO EUROPE SALES PER REFRIGERANT
1991 1996 2000 2004 2009 20120%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Light Commercial Compressors Sales by Refrigerant
CFC & HCFC
HFC
HC
EMBRACO PRODUCT PORTFOLIO FOR PROPANE
R290 _ 50 Hz _ LBP
EMT1117U
NEK2121U
NT2160U
EMT1121U
NEK1121U
NT2170U
EMT1125U
NEK2125U
NT2180U
EMT1130U
NEK2134U
NT2210U
EMT2117U
NEK2150U
EMT2121U
NEK1150U
EMT2130U
NEK2160U
EMTE2134U
VNEK207U
VNEK213U
R290 _ 50 Hz _ MBP
EMT6144U
NEK6152U
NT6217U
EMT6152U
NEK6165U
NT6220U
EMT6165U
NEK6181U
NT6222U
EMTE6181U
NEK6210U
NT6224U
NEK6213U
NEK6214U
NEK6217U
NEK6124U
REFRIGERATION SYSTEMCASE STUDIES
Vertical freezer with solid doorInternal volume: 500 lt
Vertical freezer with glass doorInternal volume: 400 lt
MODEL Displ. Refrigerant RPMCapacity (W) at 55 °C EN12900
-30°C -25°C -20°C -15°C -10°C
NEK2150GK 12,12 cm³ R404A/R507A 2850 326 419 529 657 807
NT2178GK 17,4 cm3 R404A/R507A 2850 399 516 651 806 983
NT2170U 20,4 cm3 R290 2850 476 620 788 9815 1196
VNEK213U 13,54 cm³ R290
2000 262 318 403 508 628
3000 298 378 477 693 728
3000 365 468 591 735 898
3600 430 558 706 873 1059
COMPRESSORS PERFORMANCES
VARIABLE CAPACITY COMPRESSOR CONTROL
OPTIONS
Thermostat VCC inverter
Temperature control
Compressor driver
Speed control
DROP IN MODE
Inverter decides the best compressor speed
VARIABLE CAPACITY COMPRESSOR CONTROL
OPTIONS
Electronic Thermostat
VCC inverter
Temperature control
Compressor driver
FREQUENCY OR SERIAL MODE
Speed control
Thermostat decides the compressor speed
HFC HC
Compressor NEK2150GK VNEK213U
Compressor type Recipro VCC Recipro
Refrigerant R507A R290
Refrigerant charge 420g 110g
Condensing temperature 42,6°C 36,9°C
Evaporating temperature -24,3°C -25,7°C
Voltage 230V/50Hz 230V/50Hz
Power (before turn off of the compressor) 606,2W 384,7W
Thermostat setting -18°C -18°C
Energy consumption per 24 hours 13,829 kWh 8,641 kWh
37,5%energy saving
CASE STUDY RESULTS
HFC HCCompressor NT2178GK NT2170U
Compressor type Recipro ReciproRefrigerant R404A R290
Refrigerant charge 400g 136gVoltage 230V/50Hz 230V/50Hz
Thermostat setting -17°C -17°CEnergy consumption per 24 hours 14,400 kWh 8,219 kWh(*)
(*)Consumption with high efficiency fan motors and led lightning
42,9%energy saving
CASE STUDY RESULTS
REFRIGERATION SYSTEM ENVIRONMENTAL IMPACT
TEWI Total Equivalent Warming Impact, is
considered as a good parameter to evaluate the
impact on the environment caused by a refrigerating
system.
Direct effect: L – Leakage rate (kg/year) n – Life time (years) m – Refrigerant charge (kg) – Recycling factor (%)Indirect effect:
E – Energy consumption (kWh/year) – Emission from energy generation (kgCO2/kWh)
TEWI = GWP*L*n + GWP*m*(1-) + n*E* [kg CO2]
Refrigerant GWP L n m α E β TEWI
Glass Door– NT2178GK R404A 3280 0 10 0,400 0 5258 0,339 19122
Glass Door – NT2170U R290 3 0 10 0,138 0 3000 0,339 10170
Solid Door – NEK2150GK R507A 3300 0 10 0,420 0 5047 0,339 18497
Solid Door – VNEK213U R290 3 0 10 0,110 0 3154 0,339 10692
REFRIGERATION SYSTEM ENVIRONMENTAL
IMPACT
42 - 47%CO2 emission reduction
Refrigerant
Energy consumptio
n (KWh/year)
Price range Euro/kWh
Costs of energy in one year
Euro
Annual saving Euro
Glass Door – NT2178GK R404A 5256 0,1 – 0,3 526 - 1577 Ref
Glass Door – NT2170U R290 3000 0,1 – 0,3 300 - 900 226 - 677
Solid Door – NEK2150U R507A 5047 0,1 – 0,3 505 – 1514 Ref
Solid Door – VNEK213U R290 3154 0,1 – 0,3 315 - 946 189 - 568
OPERATIONAL COST FOR END USER
Higher cost of variable capacity drive is quickly compensed by operating cost reduction
CONCLUSIONS
THANK YOU!
ENERGY EFFICIENCY
IMPROVEMENT IN LIGHT
COMMERCIAL REFRIGERATION
SYSTEMS
CASE STUDIESMarek Zgliczynski