TEST REPORT #67. Compressor Calorimeter Test of Refrigerant ARM-25 in a R-404A Reciprocating Compressors

Transcription

1 Air-Conditioning, Heating, and Refrigeration Institute (AHRI) Low-GWP Alternative Refrigerants Evaluation Program (Low-GWP AREP) TEST REPORT #67 Compressor Calorimeter Test of Refrigerant ARM-25 in a R-404A Reciprocating Compressors Laurence Pérouffe Gaël Renevier Tecumseh Products Company 2 avenue Blaise Pascal Vaulx Milieu - France January 18, 2016 This report has been made available to the public as part of the author company s participation in the AHRI s Low-GWP AREP.

2 1. Introduction: This report covers the calorimeter testing results of refrigerant blend ARM25 (GWP100 < 150) performed by Tecumseh Products Company (Tecumseh) in the framework of the AHRI Low-GWP AREP II study. The testing was done from September to October 2015 in Tecumseh s ISO accredited Research and Development lab facility located in La Verpillière, France. The refrigerant was tested with two Tecumseh reciprocating compressors primarily approved for R-404A: FH2511Z for low back pressure commercial refrigeration type application FH4540Z for high back pressure commercial refrigeration type application No optimization, oil or hardware changes were made to account for the alternative blend. 2. Details of Test Setup: a. Description of Test Refrigerant-Lubricant and Charge Refrigerant or refrigerant blend tested o R404A supplied by Gazechim o ARM25 supplied by Arkema o total refrigerant charge: Compressor R-404A ARM25 model Lbs Kg Lbs Kg FH2511Z FH4540Z Lubricant o POE oil viscosity grade 32 cst o FH2511Z charge 1625 cubic centimeter o FH4540Z charge 1480 cubic centimeter b. Description of Compressors Hermetic two piston reciprocating compressors made by Tecumseh no compressor modifications or accessories in place during test 2

3 Model FH2511Z FH4540Z Application LBP HBP S/N 54 L C 54 L C Ambient 95 F (35 C) 95 F (35 C) Subcooling 0 K 0 K Fan cooling yes yes Fan airflow 530 CFM (900m 3 /h) 2*530 CFM (1800 m3/h) Temperature Dew point Dew point determination Motor type CSR High Start Torque CSR High Start Torque Power supply 230V 50Hz 230V 50Hz Phase 1 1 Displacement 4.53 cubic inch 4.53 cubic inch c. Orientation of air flow in relation to the compressor FH2511Z Fan Ø 250mm 152mm 900m3/h FH4540Z 2 fans Ø 250mm 152mm 900m3/h 3

4 d. Description and Size of Test Loop The performance tests were done on a secondary fluid calorimeter on the suction side according method A of standard NF EN : A direct expansion coil serves as a primary evaporator. This evaporator is suspended in the upper part of a pressure-tight and heat-insulated vessel. A heater is located in the base of this vessel, which is charged with a secondary fluid so that the heater is well below the liquid surface. As per NF EN : 2003 clause this calorimeter is in constant use and is subject to periodical calibration in accordance with EN ISO 9001 therefore a second concurrent test (i.e mass flow meter) is not necessary The refrigerant flow is controlled by a constant-pressure and heat-insulated expansion device located close to the calorimeter. The calorimeter is insulated and exposed to the ambient surrounding the compressor ; the secondary fluid is maintained to the same by varying the heater power in such a manner that there is no heat exchange between the calorimeter and the ambient. The suction gas is adjusted to basic test condition by injecting refrigerant collected at the condenser outlet in the suction line via an expansion device. 1 Refrigerant gas at the compressor inlet at the basic test conditions 2 Refrigerant gas at the compressor outlet 5 Refrigerant liquid at the inlet of the expansion device 6 Refrigerant gas at the outlet of the calorimeter A Compressor B Condenser C Expansion device E Heater F Calorimeter G Injection expansion device ts Temperature of the secondary fluid 4

5 e. Instrument uncertainties Expanded uncertainties with a coverage factor k=2 assuring a level of confidence of 95% Instrument Measurement Full scale Uncertainty of reading Druck transducer Suction pressure 145 psi (10 bars) ± 0.92% Druck transducer Discharge pressure 580 psi (40 bars) ± 0.92% RTD Pt100 Temperatures 140 F (60 C) ± 0.52 F / 0.29 C Zimmer LMG450 Power 600V 16A ± 0.5% Calorimeter Refrigerating capacity 82 kbtu/h (24kW) ± 0.93% f. Source of thermodynamic properties R404A : from ASEREP32.DLL version 3.45 ARM25 : Refprop mixture and interaction file provided by Arkema g. Compressor operating conditions during test Operating map points were measured first with R404A then with ARM25 with 10K (18 F) superheat and with fixed 20 C (68 F) suction gas according NF EN 12900:

6 3. Results All compressor tests are performed at a dew point for suction and discharge pressure conditions, per AHRI Standard 540 requirements. This does not have an impact on comparing compressor performance between two or more refrigerants that do not exhibit glide. However, when refrigerants exhibit glide, it is important to note that actual systems operate closer to the mid-point condition. When comparing compressor performance of one refrigerant with glide to another refrigerant without glide, or comparing two refrigerants with significantly different glides, comparison at pressures corresponding to the midpoint of the glide rather than the dew point will yield results that are more representative of actual operation in a system. The total glide for ARM25 is 12.2K at 1 bar and 6.6K at 30 bars. R404A is near azeotropic blend with small glide less than 1K and from practical purposes can be neglected Reference measurement with R404A Low Back Pressure Compressor FH2511Z Operating map with 10K superheat (18 F) Ambient Evaporating Condensing Superheating Return Gas Temperature Discharge * Subcooling Cooling Capacity Mass flow Amps Input power EER COP F C F C F C F K F C F C F/ K BTU/hr W Lbm/hr Kg/hr A W BTU/Whr W/W *measured on discharge line at 6 from compressor discharge port Table a, measured data of LBP compressor FH2511Z, R404A, 10K superheat 6

7 10-Coefficient polynomial equation The coefficient data was derived from ASEVAL Software version 2.2. The coefficients are based on dew point s, with input s to/tc in C. Capacity/Power/Mass Flow= C1+C2*to+C3*tc+C4*to^2+C5*to*tc+C6*tc^2+C7*to^3+C8*to^2*tc+C9*to*tc^2+C10*tc^3 These coefficients are only applicable within the standard operating envelope of the compressor: Figure 1, FH2511Z Operating Map, R404A, 10K superheat or 20 C return gas Coefficient Capacity Power Mass Flow COP (W) (W) (kg/h) (W/W) C C C C C C C C C C Table b, Coefficients of LBP compressor FH2511Z, R404A, 10K superheat 7

8 Figure 1a, FH2511Z Capacity (W), R404A, 10K superheat Figure 1b, FH2511Z Power Input (W), R404A, 10K superheat 8

9 Figure 1c, FH2511Z Mass Flow (kg/s), R404A, 10K superheat Figure 1d, FH2511Z COP (W/W), R404A, 10K superheat 9

10 Operating map with 20 C Return Gas Temperature (68 F) Ambient Evaporating Condensing Superheating Return Gas Temperature Discharge * Subcooling Cooling Capacity Mass flow Amps Input power EER COP F C F C F C F K F C F C F/ K BTU/hr W Lbm/hr Kg/hr A W BTU/Whr W/W Table a, Measured data of LBP compressor FH2511Z, R404A, 20 C RGT Coefficient Capacity Power Mass Flow COP (W) (W) (kg/h) (W/W) C C C C C C C C C C Table b, Coefficients of LBP compressor FH2511Z, R404A, 20 C RGT 10

11 Figure 2a, FH2511Z Capacity (W), R404A, 20 C RGT Figure 2b, FH2511Z Power Input (W), R404A, 20 C RGT 11

12 Figure 2c, FH2511Z Mass Flow (kg/s), R404A, 20 C RGT Figure 2d, FH2511Z COP (W/W), R404A, 20 C RGT 12

13 AREP test conditions for commercial refrigeration applications Ambient Evaporating Condensing Superheating Return Gas Temperature Discharge * Subcooling Cooling Capacity Mass flow Amps Input power EER COP F C F C F C F K F C F C F/ K BTU/hr W Lbm/hr Kg/hr A W BTU/Whr W/W Table , Measured data of LBP compressor FH2511Z, R404A, AREP rating points 13

14 Operating map with 10K superheat (18 F) High Back Pressure Compressor FH4540Z Operating map with 10K superheat (18 F) Ambient Evaporating Condensing Superheating Return Gas Temperature Discharge Subcooling Cooling Capacity Mass flow Amps Input power EER COP F C F C F C F K F C F C F/ K BTU/hr W Lbm/hr Kg/hr A W BTU/Whr W/W Table a, Measured data of HBP compressor FH4540Z, R404A, 10K superheat 14

15 Figure 1, FH4540Z Operating Map, R404A, 10K superheat or 20 C return gas Coefficient Capacity (W) Power (W) Mass Flow (kg/h) COP (W/W) C C C C C C C C C C Table b, Coefficients of HBP compressor FH4540Z, R404A, 10K superheat 15

16 Figure 3a, FH4540Z Capacity (W), R404A, 10K superheat Figure 3b, FH4540Z Power Input (W), R404A, 10K superheat 16

17 Figure 3c, FH4540Z Mass Flow (kg/s), R404A, 10K superheat Figure 3d, FH4540Z COP (W/W), R404A, 10K superheat 17

18 Operating map with 20 C Return Gas Temperature (68 F) Ambient Evaporating Condensing Superheating Return Gas Temperature Discharge Subcooling Cooling Capacity Mass flow Amps Input power EER COP F C F C F C F K F C F C F/ K BTU/hr W Lbm/hr Kg/hr A W BTU/Whr W/W Table a, Measured data of HBP compressor FH4540Z, R404A, 20 C RGT 18

19 Coefficient Capacity (W) Power (W) Mass Flow (kg/h) COP (W/W) C C C C C C C C C C Table b, Coefficients of HBP compressor FH4540Z, R404A, 20 C RGT Figure 4a, FH4540Z Capacity (W), R404A, 20 C RGT 19

20 Figure 4b, FH4540Z Power Input (W), R404A, 20 C RGT Figure 4c, FH4540Z Mass Flow (kg/s), R404A, 20 C RGT 20

21 Figure 4d, FH4540Z COP (W/W), R404A, 20 C RGT 21

22 AREP test conditions for commercial refrigeration applications Ambient Evaporating Condensing Superheating Return Gas Temperature Discharge Subcooling Cooling Capacity Mass flow Amps Input power EER COP F C F C F C F K F C F C K BTU/hr W Lbm/hr Kg/hr A W BTU/Whr W/W Table , Measured data of HBP compressor FH4540Z, R404A, AREP rating points 22

23 3.2. Measurement with ARM Low Back Pressure Compressor FH2511Z Operating map with 10K superheat (18 F) Ambient Evaporating Condensing Superheating Return Gas Temperature Discharge * Subcooling Cooling Capacity Mass flow Amps Input power EER COP F C F C F C F K F C F C F/ K BTU/hr W Lbm/hr Kg/hr A W BTU/Whr W/W Table a, Measured data of LBP compressor FH2511Z, ARM25, 10K superheat Coefficient Capacity Power Mass Flow COP (W) (W) (kg/h) (W/W) C C C C C C C C C C Table b, Coefficients of LBP compressor FH2511Z, ARM25, 10K Superheat 23

24 Figure 5a, FH2511Z Capacity (W), ARM25, 10K Superheat Figure 5b, FH2511Z Power Input (W), ARM25, 10K Superheat 24

25 Figure 5c, FH2511Z Mass Flow (kg/s), ARM25, 10K Superheat Figure 5d, FH2511Z COP (W/W), ARM25, 10K Superheat 25

26 Operating map with 20 C Return Gas Temperature (88 F) Ambient Evaporating Condensing Superheating Return Gas Temperature Discharge * Subcooling Cooling Capacity Mass flow Amps Input power EER COP F C F C F C F K F C F C F/ K BTU/hr W Lbm/hr Kg/hr A W BTU/Whr W/W Table a, Measured data of LBP compressor FH2511Z, ARM25, 20 C RGT 26

27 Coefficient Capacity (W) Power (W) Mass Flow (kg/h) COP (W/W) C C C C C C C C C C Table b, Coefficients of LBP compressor FH2511Z, ARM25, 20 C RGT 27

28 Figure 6a, FH2511Z Capacity (W), ARM25, 20 C RGT Figure 6b, FH2511Z Power input (W), ARM25, 20 C RGT 28

29 Figure 6c, FH2511Z Mass Flow(kg/s), ARM25, 20 C RGT Figure 6d, FH2511Z COP (W/W), ARM25, 20 C RGT 29

30 AREP test conditions for commercial refrigeration applications Ambient Evaporating Condensing Superheating Return Gas Temperature Discharge * Subcooling Cooling Capacity Mass flow Amps Input power EER COP F C F C F C F K F C F C F/ K BTU/hr W Lbm/hr Kg/hr A W BTU/Whr W/W Table , Measured data of LBP compressor FH2511Z, ARM25, AREP rating points 30

31 High Back Pressure Compressor FH4540Z Operating map with 10K superheat (18 F) Ambient Evaporating Condensing Superheating Return Gas Temperature Discharge * Subcooling Cooling Capacity Mass flow Amps Input power EER COP F C F C F C F K F C F C F/ K BTU/hr W Lbm/hr Kg/hr A W BTU/Whr W/W Table a, Measured data of HBP compressor FH4540Z, ARM25, 10K Superheat 31

32 Coefficient Capacity (W) Power (W) Mass Flow (kg/h) COP (W/W) C C C C C C C C C C Table b, Coefficients of HBP compressor FH4540Z, ARM25, 10K Superheat Figure 7a, FH4540Z Capacity (W), ARM25, 10K Superheat 32

33 Figure 7a, FH4540Z Power Input (W), ARM25, 10K Superheat Figure 7a, FH4540Z Mass Flow (kg/s), ARM25, 10K Superheat 33

34 Figure 7a, FH4540Z COP (W/W), ARM25, 10K Superheat 34

35 Operating map with 20 C Return Gas Temperature (68 F) Ambient Evaporating Condensing Superheating Return Gas Temperature Discharge * Subcooling Cooling Capacity Mass flow Amps Input power EER COP F C F C F C F K F C F C F/ K BTU/hr W Lbm/hr Kg/hr A W BTU/Whr W/W Table a, Measured data of HBP compressor FH4540Z, ARM25, 20 C RGT 35

36 Coefficient Capacity (W) Power (W) Mass Flow (kg/h) COP (W/W) C C C C C C C C C C Table b, Coefficients of HBP compressor FH4540Z, ARM25, 20 C RGT Figure 8a, FH4540Z Capacity (W), ARM25, 20 C RGT 36

37 Figure 8b, FH4540Z Power Input (W), ARM25, 20 C RGT Figure 8c, FH4540Z Mass Flow (kg/s), ARM25, 20 C RGT 37

38 Figure 8a, FH4540Z COP (W/W), ARM25, 20 C RGT 38

39 AREP test conditions for commercial refrigeration applications Ambient Evaporating Condensing Superheating Return Gas Temperature Discharge * Subcooling Cooling Capacity Mass flow Amps Input power EER COP F C F C F C F K F C F C F/ K BTU/hr W Lbm/hr Kg/hr A W BTU/Whr W/W Table , Measured data of HBP compressor FH4540Z, ARM25, AREP rating points 39

40 4. Comparative Analysis 4.1. Low Back Pressure Compressor FH2511Z Operating map with 10K superheat (18 F) Tables and Figures of show the deviation of ARM25 to R-404A cooling capacity, power input, and cooling COP respectively, vs evaporating /condensing. At extreme operating conditions, testing uncertainties could lead to higher than normal variability in reported results. Tc COOLING CAPACITY To % -20% -13% -11% -11% -13% -16% 35-39% -23% -14% -10% -9% -11% -13% 40-45% -26% -15% -9% -8% -8% -10% 45-29% -16% -9% -6% -6% -7% 50-33% -17% -8% -4% -3% -4% 55-18% -8% -2% 0% -1% 60-18% -7% 0% 3% 3% Tc POWER INPUT To % -16% -13% -12% -14% -17% -22% 35-20% -17% -14% -13% -13% -16% -20% 40-20% -17% -15% -13% -13% -15% -18% 45-18% -16% -14% -13% -14% -17% 50-18% -16% -14% -13% -13% -15% 55-16% -14% -13% -13% -14% 60-16% -14% -13% -12% -13% Tc COP To % -5% 0% 1% 3% 5% 8% 35-23% -7% 0% 3% 4% 6% 9% 40-31% -10% 0% 4% 6% 8% 10% 45-14% -1% 6% 8% 10% 11% 50-18% -2% 7% 10% 12% 13% 55-3% 8% 13% 15% 15% 60-3% 9% 15% 18% 18% Tables 4.1.1, ARM25/R404A-1, FH2511Z, 10K Superheat 40

41 Figures 4.1.1, ARM25/R404A-1, FH2511Z, 10K Superheat 41

42 Operating map with 20 C Return Gas Temperature (68 F) Tables and Figures of show the deviation of ARM25 to R-404A cooling capacity, power input, and cooling COP respectively, vs evaporating /condensing. At extreme operating conditions, testing uncertainties could lead to higher than normal variability in reported results. Tc COOLING CAPACITY To % -15% -11% -8% -8% -9% -11% 35-17% -13% -8% -5% -4% -4% -6% 40-14% -11% -6% -2% 0% 0% -1% 45-11% -5% 0% 3% 4% 4% 50-10% -5% 2% 7% 9% 10% 55-2% 6% 12% 16% 17% Tc POWER INPUT To % -15% -13% -12% -13% -14% -17% 35-16% -15% -14% -13% -13% -14% -17% 40-16% -15% -14% -13% -14% -14% -16% 45-16% -15% -14% -14% -14% -16% 50-16% -15% -14% -14% -14% -15% 55-16% -14% -14% -14% -15% 60-16% -15% -14% -13% -14% Tc COP To % -1% 3% 5% 6% 6% 6% 35-1% 3% 7% 9% 11% 12% 12% 40 2% 4% 9% 13% 15% 17% 18% 45 5% 11% 16% 20% 22% 24% 50 7% 12% 19% 24% 28% 30% 55 17% 24% 30% Tables 4.1.2, ARM25/R404A-1, FH2511Z, 20 C RGT 42

43 5% Capacity 0% -5% -10% -15% -20% -25% TC 30 C TC 40 C TC 50 C TC 55 C -30% -35% -40% % COP 30% 25% 20% 15% 10% TC 30 C TC 40 C TC 50 C 5% 0% -5% -10% Figures 4.1.2, ARM25/R404A-1, FH2511Z, 20 C RGT 43

44 AREP test conditions for commercial refrigeration applications Capacity deviation ARM25/R404A-1 (%) 0% -5% -10% -7% -8% -15% -20% -16% -18% -18% -11% -25% -30% -35% -40% -29% -40/40.6C SH 11.1K RG -28.9C -35% -40/40.6C SH 22.2K RG -17.8C -27% -40/40.6C SH 58.3K RG 18.3C -31.7/40.6C SH 11.1K RG -20.6C -31.7/40.6C SH 22.2K RG -9.4C -31.7/40.6C SH 50K RG 18.3C -23.3/48.9C SH 11.1K RG -12.2C -23.3/48.9C SH 22.2K RG -1.1C -23.3/48.9C SH 41.7K RG 18.3C Efficiency deviation ARM25/R404A-1 (%) 10% 5% 0% 0% 5% 6% 3% -5% -3% -4% -10% -15% -20% -15% -13% -25% -22% Evaporating/Condensing Superheating Return Gas 44

45 Discharge with 10K superheating Tc To C R404A Tc To ARM25 45

46 Discharge with 20 C return gas Tc To R404A Tc To ARM25 46

47 4.2. High Back Pressure Compressor FH4540Z Operating map with 10K superheat (18 F) Tables and Figures of show the deviation of ARM25 to R-404A cooling capacity, power input, and cooling COP respectively, vs evaporating /condensing. At extreme operating conditions, testing uncertainties could lead to higher than normal variability in reported results. Tc COOLING CAPACITY To % -23% -20% -17% -14% -11% -9% -8% -7% 35-16% -20% -19% -17% -14% -12% -10% -9% -8% 40-15% -17% -15% -13% -11% -9% -8% -7% 45-13% -13% -11% -10% -8% -7% -6% 50-8% -9% -9% -7% -6% -5% -4% 55-6% -6% -4% -3% -2% -2% 60-4% -3% -2% 0% 1% 2% Tc POWER INPUT To % -18% -18% -17% -16% -16% -16% -16% -17% 35-16% -17% -17% -17% -17% -16% -17% -17% -18% 40-15% -16% -16% -16% -16% -16% -17% -18% 45-15% -15% -15% -15% -16% -16% -17% 50-14% -14% -14% -14% -15% -15% -16% 55-14% -14% -14% -14% -14% -15% 60-14% -14% -14% -14% -14% -14% Tc COP To % -6% -3% 0% 3% 5% 8% 10% 12% 35-1% -4% -3% 0% 3% 5% 8% 10% 13% 40 0% -1% 1% 3% 6% 8% 11% 13% 45 2% 3% 5% 7% 9% 11% 13% 50 7% 6% 7% 8% 10% 12% 14% 55 9% 10% 11% 13% 14% 16% 60 12% 12% 14% 16% 17% 19% Tables 4.2.1, ARM25/R404A-1, FH4540Z, 10K Superheat 47

48 Figures 4.2.1, ARM25/R404A-1, FH4540Z, 10K Superheat 48

49 Operating map with 20 C Return Gas Temperature (68 F) Tables and Figures of show the deviation of ARM25 to R-404A cooling capacity, power input, and cooling COP respectively, vs evaporating /condensing. At extreme operating conditions, testing uncertainties could lead to higher than normal variability in reported results. Tc COOLING CAPACITY To % -17% -13% -11% -9% -8% -7% -7% -7% 35-27% -21% -16% -13% -10% -8% -7% -6% -6% 40-25% -19% -15% -12% -9% -7% -6% -5% 45-21% -16% -13% -9% -7% -5% -3% 50-22% -17% -13% -9% -6% -4% -2% 55-15% -11% -8% -4% -2% 1% 60-9% -7% -4% -1% 2% 5% Tc POWER INPUT To % -13% -11% -11% -12% -13% -15% -16% -17% 35-20% -15% -13% -12% -12% -13% -14% -15% -16% 40-19% -15% -14% -13% -14% -14% -15% -16% 45-18% -15% -15% -14% -14% -15% -15% 50-19% -17% -15% -15% -14% -15% -15% 55-17% -15% -14% -14% -14% -14% 60-16% -14% -13% -13% -12% -12% Tc COP To % -4% -2% 0% 3% 6% 8% 11% 13% 35-9% -6% -3% -1% 2% 5% 8% 11% 13% 40-7% -4% -1% 2% 5% 8% 11% 13% 45-4% -1% 2% 6% 9% 12% 14% 50-3% -1% 3% 6% 10% 13% 15% 55 2% 4% 8% 11% 14% 17% 60 8% 8% 11% 14% 17% 20% Tables 4.2.2, ARM25/R404A-1, FH4540Z, 20 C RGT 49

50 Figures 4.2.2, ARM25/R404A-1, FH4540Z, 20 C RGT 50

51 AREP test conditions for commercial refrigeration applications 51

52 Discharge with 20 C return gas Tc To C R404A Tc ARM25 To 52

53 5. Summary The compressor calorimeter testing of Arkema ARM25 was carried out at dew point conditions versus R- 404A. Overall the compressor capacity is within 75% to +105% of R-404A rated performance across the operating map, with extremes at high pressure ratio that should be double checked on smaller calorimeter capacity range to eliminate potential testing uncertainty. The compressor COP of ARM25 is between about 85% to +115% of R-404A across the compressor operating envelope. The discharge of ARM25 is very slightly higher than R-404A. 53