Air-Conditioning, Heating, and Refrigeration Institute (AHRI) Low-GWP Alternative Refrigerants Evaluation Program (Low-GWP AREP) TEST REPORT #66 Compressor Calorimeter Test of Refrigerant HPR2A in a R-410A Scroll Compressor Serdar Suindykov Leping Zhang Andreas Gernemann Danfoss Commercial Compressors (as part of Danfoss Cooling) No 5 Fuyuan Road, Wuqing Development Area, 301700 Tianjin, China 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
Contents List of Tested Refrigerant s Composition (Mass%) 3 1 Introduction: 4 2 Details of Test Setup: 4 a Description of Test Refrigerant-Lubricant and Charge 4 b Description of Compressor 4 Table 1 Compressor operating conditions during test 5 c Description and Size of Test Loop 6 Figure 1 Simplified test loop diagram 6 Table 2 Test loop instrumentation accuracy 6 3 Results 7 4 Summary 7 Appendix A 8 Table A1 HPR2A Tabular Data (SI) 8 Table A2 HPR2A Tabular Data (IP) 9 Appendix B 10 Table B1 Coefficients for polynomial equations 10 Figure B1 Application envelope of HPR2A in SH161 11 Figure B2 Cooling capacity for R410A 12 Figure B3 Cooling capacity for HPR2A 13 Figure B4 Cooling capacity for HPR2A/R410A 14 Figure B5 Power input for R410A 15 Figure B6 Power input for HPR2A 16 Figure B7 Power input for HPR2A/R410A 17 Figure B8 COP for R410A 18 Figure B9 COP for HPR2A 19 Figure B10 COP for HPR2A/R410A 20 Figure B11 Capacity for HPR2A/R410A referenced to mean temperature 21 Figure B12 Power input for HPR2A/R410A referenced to mean temperature 22 Figure B13 COP for HPR2A/R410A referenced to mean temperature 23 2
Low-GWP AREP Technical Committee and AHRI Executive Committee List of Tested Refrigerant s Composition (Mass%) HPR2A R-32/R-1234ze/R-134a (76/18/6) 3
1 Introduction: This report covers the calorimeter test results of the refrigerant HPR2A a low-gwp candidate provided by Mexichem The tests have been conducted during May to July 2015 in the laboratory of Danfoss Commercial Compressors plant in Tianjin, China The refrigerant was drop-in tested with an R-410A compressor SH161A4 Performance data were compared based on dew point reference for evaporating and condensing temperatures The property library was given by Mexichem as a mix file for use with Refprop software 2 Details of Test Setup: a Description of Test Refrigerant-Lubricant and Charge Refrigerant tested: HPR2A (GWP 573) o R-32/R-1234ze/R-134a (76/18/6) (zeotropic blend) o total refrigerant charge; 772 lbs mass, (35 kg) Lubricant o 160SZ, POE type o viscosity grade: 32 cst o no changes to base oil b Description of Compressor hermetic fixed speed scroll compressor, low-side design no compressor modifications Danfoss Commercial Compressors model SH161A4; S/N 2756184 motor nameplate rating: 380-400V / 3ph / 50Hz, LRA 158A, Max oper current 31A 2900 RPM air flow is not required ambient air temperature 24 C ±1 C (752 F ±18 F) compressor operating conditions during test in Table 1 4
Table 1 Compressor operating conditions during test Ambient air temperature Suction pressure Saturated suction temperature (Dew) Suction vapor temperature Discharge pressure Saturated discharge temperature (Dew) Volts / Phase / Frequency F C psi bar F C F C psi bar F C V / Ø / Hz RPM 752 24 408 281-99 -233 101-122 2154 1485 801 267 400 / 3 / 50 2917 752 24 408 281-99 -233 101-122 2498 1723 900 322 400 / 3 / 50 2892 752 24 507 350 00-178 200-67 2498 1723 900 322 400 / 3 / 50 2940 752 24 564 389 50-150 250-39 3321 2290 1099 433 400 / 3 / 50 2966 752 24 626 432 100-122 300-11 2154 1485 801 267 400 / 3 / 50 2986 752 24 626 432 100-122 300-11 2891 1993 1000 378 400 / 3 / 50 2963 752 24 694 478 151-94 351 17 3321 2290 1099 433 400 / 3 / 50 2930 752 24 764 527 199-67 399 44 2498 1723 900 322 400 / 3 / 50 2955 752 24 764 527 199-67 399 44 4338 2991 1299 544 400 / 3 / 50 2920 752 24 842 580 250-39 450 72 3321 2290 1099 433 400 / 3 / 50 2964 752 24 926 639 300-11 500 100 2154 1485 801 267 400 / 3 / 50 2967 752 24 926 639 300-11 500 100 2498 1723 900 322 400 / 3 / 50 2972 752 24 926 639 300-11 500 100 2891 1993 1000 378 400 / 3 / 50 2980 752 24 1017 701 351 17 551 128 4338 2991 1299 544 400 / 3 / 50 2961 752 24 1110 765 399 44 599 155 2498 1723 900 322 400 / 3 / 50 2993 752 24 1110 765 399 44 599 155 3321 2290 1099 433 400 / 3 / 50 2965 752 24 1110 765 399 44 599 155 4937 3404 1400 600 400 / 3 / 50 2966 752 24 1214 837 450 72 650 183 2891 1993 1000 378 400 / 3 / 50 2962 752 24 1214 837 450 72 650 183 5601 3862 1501 656 400 / 3 / 50 2947 752 24 1214 837 450 72 650 183 4338 2991 1299 544 400 / 3 / 50 2955 752 24 1324 913 500 100 700 211 2591 1786 924 336 400 / 3 / 50 2984 752 24 1324 913 500 100 700 211 2891 1993 1000 378 400 / 3 / 50 2977 752 24 1324 913 500 100 700 211 3808 2625 1200 489 400 / 3 / 50 2967 752 24 1324 913 500 100 700 211 4937 3404 1400 600 400 / 3 / 50 2976 752 24 1443 995 550 128 750 239 2891 1993 1000 378 400 / 3 / 50 2948 752 24 1443 995 550 128 750 239 3321 2290 1099 433 400 / 3 / 50 2952 752 24 1443 995 550 128 750 239 4338 2991 1299 544 400 / 3 / 50 2963 752 24 1443 995 550 128 750 239 5601 3862 1501 656 400 / 3 / 50 2961 Speed 5
c Description and Size of Test Loop description of the test loop components (Figure 1) description of instrumentation used, accuracy and measuring points (Table 2) Figure 1 Simplified test loop diagram Table 2 Test loop instrumentation accuracy Device Model Scale Accuracy Liquid pressure Transducer Rosemount 2088 0-28 bar ±10% full scale Discharge pressure Transducer Rosemount 2089 0-50 bar ±10% full scale Suction pressure Transducer Rosemount 2088 0-28 bar ±10% full scale Suction temperature Transducer PT100-20-50 ±03 K Discharge temperature Transducer PT100 50-180 ±03 K Suction temperature Transducer PT100-20-50 ±03 K Compressor power Norma4000 0~150 kw 01% Reading +01% Range Mass flow F050S116CQFNF 544~8160 kg/h ±02% of rate 6
3 Results All compressor tests are performed at the refrigerant s dew point temperatures 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 temperature glide However, when refrigerants exhibit temperature 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 mid-point of the temperature glide rather than the dew point will yield results that are more representative of actual operation in a system Test measurements are summarized in tables of appendix A The test process is in accordance with standard EN13771-1 Subcooling is defined based on bubble point of condensing pressure Comparison to R410A was done based on published data with experimental validation of several points representing extreme conditions of operating envelope Based on the results of validating test, adjustment coefficients were introduced to polynomial model (1013 to cooling capacity and 1011 to power input) With mentioned adjustments Capacity, Power input and COP deviation of the polynomial model from measured data in extreme conditions is limited to ±07% 10-coefficient polynomial coefficients for capacity, power and amperes can be found in table B1 of appendix B Polynomial equations are valid within operating envelope in figure B1 Calculated performance curves for R410A and HPR2A and comparative analysis are provided in figures B2 B10 Also figures B11 B13 provide comparative analysis with reference to mean temperatures, both for evaporating and condensing 4 Summary HPR2A has a moderate temperature glide of 2 3 K (3 5 F) The capacity of HRP2A is generally lower than R410A except at the highest condensing temperature It is in range of 87 103% compared to capacity of R410A across the operating envelope (Figures B2 B4) Power consumption is 88 93% compared to R410A (Figures B5 B7) COP is in range of 96 112% of R410A, gaining more in higher condensing temperatures (Figures B8 B10) Comparing data to mean temperature reference we can see that both cooling capacity and power consumption values of HPR2A improve by 2-4% compared to R410A, while COP does not change much (Figures B11 B13) It is also important to notice that with increased subcooling R410A recovers cooling capacity faster than HPR2A, eg for 5K subcooling R410A gains around 1-4% more capacity than HPR2A, with higher difference at higher condensing temperatures COP change follows the pattern as power input is not affected 7
Table A1 HPR2A Tabular Data (SI) SST (Dew) SDT (Dew) Evap Temp (Mean) Cond Temp (Mean) Evap glide Cond glide DGT Appendix A Applicable SH Applicable SC Compressor capacity Refrigerant mass flow rate Amperes Input power Cooling COP COPalt/ COPbas eline C C C C K K C K K W kg/h A W W/W - -233 267-245 255 23 26 1141 111 83 14182 200 1329 5851 242 096-233 322-244 310 21 25 1304 111 83 13296 195 1408 6601 201 096-178 322-190 310 25 25 1113 111 83 17315 251 1420 6703 258 098-15 433-161 422 21 23 1332 111 83 17557 275 1647 8647 203 099-122 267-134 254 25 26 854 111 83 23213 320 1347 6020 386 098-122 378-134 366 24 24 1102 111 83 20996 313 1534 7702 273 098-94 433-106 422 25 23 1173 111 83 22008 341 1662 8755 251 098-67 322-79 310 25 25 869 111 83 27430 389 1442 6893 398 098-67 544-78 534 23 20 1408 111 83 21263 362 1983 11250 189 100-39 433-51 422 24 23 1045 111 83 27726 426 1673 8841 314 098-11 267-23 257 25 26 703 111 83 35789 478 1370 6223 575 100-11 322-24 309 25 25 791 111 83 34085 479 1452 6976 489 098-11 378-23 366 24 24 887 111 83 32680 479 1557 7884 415 099 17 544 05 534 23 20 1186 111 83 29996 503 2007 11412 263 100 44 322 32 311 25 25 735 111 83 41831 583 1466 7101 589 099 44 433 32 422 23 23 915 111 83 37740 572 1690 8973 421 098 44 600 33 591 21 19 1265 111 83 30649 541 2209 12890 238 103 72 378 60 366 24 24 796 111 83 43718 632 1574 8023 545 098 72 656 62 648 21 16 1353 111 83 30855 578 2462 14702 210 105 72 544 60 534 23 20 1090 111 83 36623 608 2012 11442 320 100 10 336 88 324 24 25 708 111 83 50026 699 1508 7454 671 098 10 378 88 366 24 24 765 111 83 48336 696 1582 8086 598 098 10 489 89 478 23 22 943 111 83 43336 682 1842 10163 426 100 10 600 89 591 21 19 1160 111 83 37705 660 2223 12989 290 103 128 378 115 365 26 24 749 111 83 52529 754 1593 8176 642 097 128 433 115 421 25 23 826 111 83 50160 751 1708 9103 551 098 128 544 116 534 24 20 1010 111 83 44639 736 2017 11480 389 101 128 656 118 648 21 16 1239 111 83 37982 705 2469 14745 258 105 8
Table A2 HPR2A Tabular Data (IP) SST (Dew) SDT (Dew) Evap Temp (Mean) Cond Temp (Mean) Evap glide Cond glide DGT Applicable SH 9 Applicable SC Compressor capacity Refrigerant mass flow rate Amperes Input power Cooling COP F F F F F F F F F Btu/h lbs/h A W Btu/h-W - COPalt /COPb aseline -99 801-120 779 42 46 2374 200 150 48390 440 1329 5851 827 096-99 900-119 878 38 45 2666 200 150 45368 429 1408 6601 687 096 00 900-23 877 44 45 2323 200 150 59081 553 1420 6703 881 098 50 1099 31 1079 39 41 2717 200 150 59908 607 1647 8647 693 099 100 801 78 777 45 46 1857 200 150 79207 706 1347 6020 1316 098 100 1000 79 979 43 43 2304 200 150 71640 691 1534 7702 930 098 151 1099 128 1079 45 41 2431 200 150 75094 753 1662 8755 858 098 199 900 177 877 45 45 1884 200 150 93596 858 1442 6893 1358 098 199 1299 179 1281 41 36 2854 200 150 72551 799 1983 11250 645 100 250 1099 228 1079 43 41 2200 200 150 94605 939 1673 8841 1070 098 300 801 278 783 45 46 1585 200 150 122118 1054 1370 6223 1962 100 300 900 278 876 45 45 1744 200 150 116304 1057 1452 6976 1667 098 300 1000 279 979 43 43 1916 200 150 111510 1055 1557 7884 1414 099 351 1299 330 1281 42 36 2455 200 150 102352 1109 2007 11412 897 100 399 900 377 880 44 45 1643 200 150 142732 1286 1466 7101 2010 099 399 1099 378 1079 42 41 1966 200 150 128774 1260 1690 8973 1435 098 399 1400 380 1383 38 33 2597 200 150 104577 1193 2209 12890 811 103 450 1000 428 979 44 43 1753 200 150 149173 1394 1574 8023 1859 098 450 1501 431 1486 38 30 2756 200 150 105282 1274 2462 14702 716 105 450 1299 429 1281 42 36 2282 200 150 124963 1341 2012 11442 1092 100 500 924 479 902 43 44 1594 200 150 170695 1542 1508 7454 2290 098 500 1000 479 978 43 43 1697 200 150 164928 1535 1582 8086 2040 098 500 1200 479 1181 41 39 2018 200 150 147869 1504 1842 10163 1455 100 500 1400 481 1383 38 33 2408 200 150 128653 1454 2223 12989 990 103 550 1000 527 978 46 43 1668 200 150 179236 1663 1593 8176 2192 097 550 1099 528 1077 46 41 1808 200 150 171154 1656 1708 9103 1880 098 550 1299 529 1281 43 36 2138 200 150 152314 1621 2017 11480 1327 101 550 1501 532 1486 38 30 2550 200 150 129601 1554 2469 14745 879 105
Appendix B Based on acquired data 10-coefficient polynomial equations were generated for cooling capacity, power input and amperes with reference to dew temperature The set of coefficients is given in Table B1 The equations are valid within its application envelope given in Figure B1 for conditions with superheat 11 K and subcooling 83 K Table B1 Coefficients for polynomial equations For R410A: C0 C1 C2 C3 C4 C5 C6 C7 C8 C9 Capacity 46166 16216-5331 23781-3035 -5401 01154-01451 -01116 001567 Power 26973-2200 19918-1296 2293-28398 -001238 003962-00337 00432 Amperes 10238 0008 01815 471E-4 790E-4-283E-3 1083E-6-391E-6-179E-5 553E-5 For HPR2A: C0 C1 C2 C3 C4 C5 C6 C7 C8 C9 Capacity 49137 1736-63104 2439-1588 9336 01365-01971 00762-008898 Power 2945 5314 12554 1799-1581 -07500 002018-004051 001535 002364 Amperes 11236 008336 007039 2402E-3-2877E-3 6551E-5 2026E-5-5602E-5 3138E-5 2947E-5 10
Condensing temperature, C Condensing temperature, F HPR2A vs R410A @SH161A4 (SH=10K) Evaporating temperature, F -22-13 -4 5 14 23 32 41 50 59 68 75 167 65 149 55 131 45 113 35 95 25 77 15 59 5-30 -25-20 -15-10 -5 0 5 10 15 20 Evaporating temperature, C 41 Figure B1 Application envelope of HPR2A in SH161 (DGT discharge gas temperature) 11
Capacity, kw Capacity, kbtu/h Data below is calculated for conditions with superheat 10 K and subcooling 0 K Values are referenced to dew temperatures except for figures B11 B13, which are referenced to mean temperatures and are to estimate the impact of temperature glide Capacity R410A SST, F 60 200 50 40 30 20 10 150 100 50 0-25 -20-15 -10-5 0 5 10 15 SST, C 0 Figure B2 Cooling capacity for R410A (SST saturated suction temperature) 12
Capacity, kw Capacity, kbtu/h Capacity HPR2A SST, F 60 200 50 150 40 30 20 10 0-25 -20-15 -10-5 0 5 10 15 SST, C 100 50 0 Figure B3 Cooling capacity for HPR2A 13
Capacity Capacity HPR2A/R410A SST, F 120 115 110 105 100 095 090 085 080-25 -20-15 -10-5 0 5 10 15 SST, C Figure B4 Cooling capacity for HPR2A/R410A 14
Power, kw Power R410A SST, F 16 14 12 10 8 6 4 2 0-25 -20-15 -10-5 0 5 10 15 SST, C Figure B5 Power input for R410A 15
Power, kw Power HPR2A SST, F 16 14 12 10 8 6 4 2 0-25 -20-15 -10-5 0 5 10 15 SST, C Figure B6 Power input for HPR2A 16
Power Power HPR2A/R410A SST, F 120 115 110 105 100 095 090 085 080-25 -20-15 -10-5 0 5 10 15 SST, C Figure B7 Power input for HPR2A/R410A 17
COP, kw/kw EER, kbtu/h-kw COP R410A SST, F 10 9 30 8 7 6 5 25 20 4 15 3 10 2 1 5 0 0-25 -15-5 5 15 SST, C Figure B8 COP for R410A 18
COP, kw/kw EER, kbtu/h-kw COP HPR2A SST, F 10 9 30 8 7 6 5 25 20 4 15 3 10 2 1 5 0 0-25 -15-5 5 15 SST, C Figure B9 COP for HPR2A 19
COP COP HPR2A/R410A SST, F 120 115 110 105 100 095 090 085 080-25 -20-15 -10-5 0 5 10 15 SST, C Figure B10 COP for HPR2A/R410A 20
Capacity Capacity HPR2A/R410A Mean Evaporating Temperature, F 120 115 110 105 100 095 090 085 080-25 -20-15 -10-5 0 5 10 15 Mean Evaporating Temperature, C Figure B11 Capacity for HPR2A/R410A referenced to mean temperature 21
Power Power HPR2A/R410A Mean Evaporating Temperature, F 120 115 110 105 100 095 090 085 080-25 -20-15 -10-5 0 5 10 15 Mean Evaporating Temperature, C Figure B12 Power input for HPR2A/R410A referenced to mean temperature 22
COP COP HPR2A/R410A Mean Evaporating Temperature, F 120 115 110 105 100 095 090 085 080-25 -20-15 -10-5 0 5 10 15 Mean Evaporating Temperature, C Figure B13 COP for HPR2A/R410A referenced to mean temperature 23