Compressor Calorimeter Test of R-404A Alternative Refrigerants ARM-31a, D2Y-65, L-40, and R-32/R- 134a (50/50) in Medium Temperature Refrigeration Scroll Compressor Som Shrestha Omar Abdelaziz January 16 th, 2014 New York City
Overview Compressor Calorimeter Test Results 2 Presentation name
Test Setup Instrument Measured Accuracy RTDs Temperature ± 0.4 F T, P Condenser Sub Cooler SC Glycol Cond Glycol Mass Flow Sensor Power and Energy Meter Pressure Transmitter Pressure Transmitter Refrigerant mass flow rate Compressor and evaporator power Refrigerant pressure, high pressure side Refrigerant pressure, low pressure side ±0.10% ±0.5% 0.25% F.S. [750 psia] 0.25% F.S. [200 psia] 3 Presentation name
Test Conditions Test condition: 70 F to 140 F SDT in 10 F increments -10 F to 35 F SST in 5 F increments Either 20 F or 40 F superheat or 65 F suction temperature Cooling capacity normalized for 0 F subcooling Max discharge temperature 275 F Properties of refrigerants were calculated using REFPROP version 9.0 (Lemmon et al., 2010). Interaction parameters and mixture files provided by the refrigerant manufacturers were used in REFPROP to calculate properties of the alternative refrigerants (except for R-32/R- 134a mixture) tested. 4 Presentation name
Manufacturer's Compressor Performance Data Evaporating ( F) / Condensing ( F) 20 / 120 Return Gas ( F) / Liquid to Expansion Valve ( F) 65 / 120 Capacity (Btu/hr) 23500 Power (Watts) 3320 Current (Amps) 15.6 EER (Btu/Wh) 7.1 Mass Flow (lbs/hr) 495 The measured cooling capacity and EER were within ± 2.7% and ± 0.2%, respectively, of the manufacturer s data. Intermediate tests confirmed repeatability of cooling capacity within 0.45% and EER within 0.5% at standard test conditions. 5 Presentation name
Alternative Refrigerants Tested Refrigerant Components Mass Fraction, % GWP 100 R-404A R-125 / R-143a / R-134a 44/52/4 3700 ARM-31a R-32 / R-134a / R-1234yf 28/21/51 490* D2Y-65 R-32 / R-1234yf 35/65 253* L-40 R-32 / R-152a / R-1234yf / R-1234ze(E) 40/10/20/30 302* R-32/R-134a R-32 / R-134a 50.5/49.5 1040* * Calculated based on GWP of pure refrigerants and their mass fraction in the blend 6 Presentation name
Results Refrigerant ARM-31a D2Y-65 L-40 R-32 + R-134a mixture Test Condition Deviation from baseline (R-404A) EER (%) Capacity (%) Discharge Temperature ( F) Evap 20 F/ Cond 120 F +9.7% -5.6% +24 Over the range -4.4% to +22.8% -18.5% to +6.5% +16 to +36 Evap 20 F/ Cond 120 F +6.5% +0.6% +26 Over the range -4.2% to +14.6% -11.0% to +9.7% +18 to +36 Evap 20 F/ Cond 120 F +9.8% -4.9% +37 Over the range -5.4% to +24.7% -20.0% to +8.9% +25 to +53 Evap 20 F/ Cond 120 F +4.2% +3.8% +63 Over the range -7.6% to +15.2% -12.6% to +18% +38 to +74 7 Presentation name
Results Saturation Discharge Temperature, F EER Ratio Saturation Suction Temperature, F 8 Presentation name
Results Saturation Discharge Temperature, F Capacity Ratio Saturation Suction Temperature, F 9 Presentation name
Results Saturation Discharge Temperature, F Discharge Temperature Difference, F Saturation Suction Temperature, F 10 Presentation name
Results Saturation Discharge Temperature, F Discharge Temperature Difference, F Saturation Suction Temperature, F 11 Presentation name
Conclusions EER and cooling capacity for all four alternative refrigerants are higher than that of R-404A at higher SST SDT and lower at lower SST and SDT Discharge temperatures of all the alternative refrigerants were significantly higher than that of R-404A at all the test conditions Note: Complete test data and other details are provided at the AHRI AREP 2013 as test report number 21 12 Presentation name
Acknowledgements Funding from DOE-BTO and Mr. Antonio Bouza, HVAC&R, and Water Heating TDM at the U.S. DOE for his support Dr. Isaac Mahdereka, Mr. Vishaldeep Sharma, Randy Linkous, and Brian Goins, for their support Dr. Xudong Wang from AHRI for his support Arkema, Daikin, Honeywell, and National Refrigerants for providing lower-gwp alternative refrigerants to test 13 Presentation name
References ANSI/AHRI 540-2004, Standard for Performance Rating of Positive Displacement Refrigerant Compressors and Compressor Units ANSI/ASHRAE Standard 23.1-2010, Methods of Testing for Rating the Performance of Lemmon, E.W. Huber, M.L., and McLinden, M. O., 2010, NIST Standard Reference Database 23, NIST Reference Fluid Thermodynamic and Transport Properties REFPROP. Version 9.0 User's Guide, November 2010. Som Shrestha, Vishaldeep Sharma, Omar Abdelaziz, 2013. Compressor Calorimeter Test of R-404A Alternatives ARM-31a, D2Y- 65, L-40, and R-32/R-134a (50/50), TEST REPORT #21, Air- Conditioning, Heating, and Refrigeration Institute Low-GWP Alternative Refrigerants Evaluation Program http://www.ahrinet.org/app_content/ahri/files/research/arep_fin al_reports/ahri%20low-gwp%20arep-rpt-021.pdf 14 Presentation name
Thank You! Som Shrestha shresthass@ornl.gov 15 Presentation name
Appendix 16 Presentation name
Results: EER Ratios 1.30 1.25 1.20 1.15 1.10 1.05 1.00 0.95 EER ARM 31a / EER R 404A 0.90 10 5 0 5 10 15 20 25 30 35 1.30 1.25 1.20 1.15 1.10 1.05 1.00 0.95 ARM-31a Suction Dew Point Temperature, F EER L 40 / EER R 404A L-40 0.90 10 5 0 5 10 15 20 25 30 35 Suction Dew Point Temperature, F Discharge Dew Point Temp ( F) 70 80 90 100 110 120 130 140 Discharge Dew Point Temp ( F) 70 80 90 100 110 120 130 140 1.30 1.25 1.20 1.15 1.10 1.05 1.00 0.95 EER D2Y 65 / EER R 404A 0.90 10 5 0 5 10 15 20 25 30 35 1.30 1.25 1.20 1.15 1.10 1.05 1.00 0.95 D2Y-65 Suction Dew Point Temperature, F EER R32 + R 134a mixture / EER R 404A R32 + R-134a 0.90 10 5 0 5 10 15 20 25 30 35 Suction Dew Point Temperature, F Discharge Dew Point Temp ( F) 70 80 90 100 110 120 130 140 Discharge Dew Point Temp ( F) 70 80 90 100 110 120 130 140 17 Presentation name