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