Update on Phase II of the AHRI Low ‐ Update on Phase II of the AHRI Low GWP Alternative Refrigerants Evaluation Program (Low GWP AREP) Evaluation Program (Low ‐ GWP AREP) Karim Amrane and Xudong Wang g g Air ‐ Conditioning, Heating, and Refrigeration Institute (AHRI) Technical Forum on Research Projects for Alternative Refrigerants in High Ambient Countries 31 October 2015, Dubai, UAE , ,
Low ‐ GWP AREP Introduction � Cooperative research & testing program to identify suitable alternatives to high GWP refrigerants � Evaluation of candidates strongly desired by OEMs � The program is NOT to prioritize refrigerants, rather test and present objective results in a consistent manner � Final reports available to the public � Phase I was completed at the end of 2013. – 38 refrigerants were evaluated in Phase I testing. g g – AHRI published 40 test reports. � Phase II testing started in 2014, and is ongoing – new refrigerants – new refrigerants – high ambient testing
AHRI Low ‐ GWP AREP ‐ Phase II � 29 � 29 new refrigerant candidates proposed, 19 tested (in red color) f i t did t d 19 t t d (i d l ) Alternative Refrigerant Candidates Classifications according to ASHRAE Baseline Refrigerants Standard 34 A1 A2L A2 R-134a R-134a BRB36 BRB36 ARM-32b, ARM-35, D42Yb, ARM-20a, D42Yz, R-404A ARM-20b, ARM-25a DR-34 (R-452A), ( ) HDR110 HDR110 N-40c (R-448A) , R-442A R-449B ARM-71a, DR-5A (R454B), DR 55 DR-55 R-410A HPR2A L-41-1 (R-446A) L-41-2 (R-447A) ARM-32c, D542HT D542HT, DR-91, DR-3, R-22/R-407C DR-93, L-20a (R-444B) N-20b, R-442A, R-449B ARC-1, R-123 LPR1A R1233zd(E)
Low ‐ GWP AREP Phase II HAT Matrix Max. Test Nominal Ambient Baseline ARM ‐ ARM ‐ Product DR ‐ 55 DR ‐ 5A HPR2A L ‐ 41 ‐ 1 L ‐ 41 ‐ 2 N ‐ 40c R ‐ 32 companies i C Capacity i 20b 20b 71a 71 Category conditions Carrier 10 ‐ ton 125F 410A X X X X Goodman 2.5 ‐ ton 125F R ‐ 22 X Rooftop p Goodman 2.5 ‐ ton 125F 410A X Unit Lennox 5 ‐ ton 125F 410A X X X X X X Trane 4 ‐ ton 125F 410A X X X Zamilac 6 ‐ ton 125F 410A X Carrier 3 ‐ ton 125F 410A X X X X X Split System Danfoss 3 ‐ ton 125F 410A X X X Goodman 3 ‐ ton 125F 410A X Chiller Armines 10kW 115F 410A X X X X Ice Machine Manitowoc 910 lb/24hr 120F 404A X X
Low ‐ GWP Refrigerants in HAT ASHRAE GWP Designation Composition (AR4) Classification ARM 20b NA ARM ‐ 20b NA not yet disclosed t t di l d <150 150 A2L A2L ARM ‐ 71a NA not yet disclosed <500 A2L DR ‐ 55 NA R ‐ 32/R ‐ 125/R ‐ 1234yf (67/7/26) 698 A2L DR ‐ 5A R ‐ 454B R ‐ 32/R ‐ 1234yf (68.9/31.1) 466 A2L HPR2A NA not yet disclosed 600 A2L L ‐ 41 ‐ 1 R ‐ 446A R 446A R32/R1234ze(E)/R600 (68/29/3) R32/R1234ze(E)/R600 (68/29/3) 461 461 A2L A2L L ‐ 41 ‐ 2 R ‐ 447A R32/R1234ze(E)/R125 (68/28.5/3.5) 572 A2L R32/R125/R134a/R1234yf/R1234ze(E) N ‐ 40c R ‐ 448A (26/26/21/20/7) ( / / / / ) 1273 A1 R ‐ 32 R ‐ 32 R ‐ 32 (100) 675 A2L
Rooftop Unit Drop ‐ in Tests � 5 ‐ ton rooftop packaged air ‐ conditioner – Lennox LGH060H4ESP Lennox LGH060H4ESP – AHRI Classification: SP ‐ A – Cooling Capacity (BTUH): 60,000 – EER Rating: 12.7 – Scroll compressor with POE oil – Nominal Air flow rate 1750 cfm Nominal Air flow rate 1750 cfm � Test Conditions – Standard A (95F), B (82F) and high ambient (115F and 125F)
Rooftop Unit Drop ‐ in Test (Source: AREP Report No. 47 and 53, Lennox Industries) (Source: AR P Report No. 47 and 53, ennox Industries)
Rooftop Unit Drop ‐ in Test (Source: AREP Report No. 47 and 53, Lennox Industries) (Source: AR P Report No. 47 and 53, ennox Industries)
Rooftop Unit Drop ‐ in Test (Source: AREP Report No. 47 and 53, Lennox Industries)
Rooftop Unit Drop ‐ in Test � The tested alternate refrigerants had higher discharge temperatures compared to R ‐ 410A. (Source: AREP Report No. 47 and 53, Lennox Industries)
Rooftop Unit Soft ‐ Optimization Test � Unit ‐ 1: 6 ‐ ton rooftop packaged air conditioner (AREP Report No. 55, Zamil AC) , ) – R ‐ 410A system with a scroll compressor (ZP61K5E) – Original production POE oil and production 6.5 ‐ ton TXV � Soft ‐ optimized system for R ‐ 32 test: – The original compressor was changed to a prototype compressor (ZP61KCE) with POE oil, having a slightly larger p ( ) , g g y g displacement volume (7.18 ft^3/min Vs 7.06 ft^3/min) – the 6.5 ‐ ton TXV was changed to a 4.5 ‐ ton TXV. � T � Tested per AHRI Standard 340/360 t d AHRI St d d 340/360
Rooftop Unit Soft ‐ Optimization Test (Source: AREP Report No. 55, Zamil Central Air Conditioners)
Rooftop Unit Soft ‐ Optimization Test � Unit ‐ 2: 4 ‐ ton rooftop heat pump (AREP Report No. 56, Ingersoll Rand) – R ‐ 410A system with a fixed ‐ speed scroll compressor (SXA044B2BPA) with POE oil. – Original installed non ‐ adjustable TXVs for cooling and heating. g j g g � Soft ‐ optimized system for alternative refrigerants tests: – A variable frequency drive (VFD) was installed to allow the original compressor speed to be varied so that all refrigerants original compressor speed to be varied so that all refrigerants could be tested at the same capacity. – the original TXVs were changed to adjustable TXVs of the same size for cooling and heating size for cooling and heating. � Tested per AHRI Standard 210/240
Rooftop Unit Soft ‐ Optimization Test � System charge and compressor speed were first determined to match R ‐ 410A capacity at A condition (95F) with EER optimized. Capacity at 95F EER Charge (lb) AFD (Hz) (btu/hr) (btu/w ‐ hr) R ‐ 410A 9 60 50,241 11.32 DR ‐ 55 8.2 60 50,213 11.81 R ‐ 32 R 32 7.25 7.25 55 55 50,637 50,637 11.98 11.98 DR ‐ 5A 8.2 61 50,627 11.84 � Then tests were run with each refrigerant, using the selected refrigerant charge, TXV setting, and AFD speed for all other f i t h TXV tti d AFD d f ll th conditions.
Rooftop Unit Soft ‐ Optimization Test Note: R ‐ 32 was not tested at 125F due to high discharge temperature. (Source: AREP Report No. 56, Ingersoll Rand)
Split Systems Drop ‐ in Tests � Two R ‐ 410A ducted split heat pumps were tested: – Unit ‐ 1: 3 ‐ ton, 14 SEER Unit 1: 3 ton, 14 SEER – Unit ‐ 2: 2.5 ‐ ton, 13 SEER � Test Conditions – Standard A (95F), B (82F) and high ambient (125F) – Standard heating conditions (not included in this presentation)
Split Systems Drop ‐ in Tests Note: R ‐ 32 at 125F in Unit 2 was not tested due to high discharge temp. ( (Source: AREP Reports No. 52, Carrier, and 54, Danfoss A/S) d f / )
Split System Soft ‐ Optimization Test � Baseline: – R ‐ 410A system with a new scroll compressor (ZP31K6) R 410A system with a new scroll compressor (ZP31K6) – Original production POE oil and production 4 ‐ ton TXV � Soft ‐ optimized system for R ‐ 32 test: – Step 1: the 4 ‐ ton TXV was changed to a 3 ‐ ton TXV, no other components were changed. – Step 2: another ZP31K6 compressor charged with Emerson Step 2: another ZP31K6 compressor charged with Emerson prototype R32 POE oil was used. The 3 ‐ ton TXV was used.
Split System Air Conditioner Soft ‐ Optimization Test R32 with production POE oil test could not be performed due to high discharge temperature. (Source: AREP Report No. 42, Goodman Manufacturing)
Split System Air Conditioner Soft ‐ Optimization Test (Source: AREP Report No. 42, Goodman Manufacturing)
Chiller Drop ‐ in Test � A water chiller was tested with and without liquid receiver R32 test was not performed due to high discharge R32 test was not temperature (>126C). performed due to high discharge temperature (>126C). (Source: AREP Report No. 46, CES Armines) (Source: AR P Report No. 46, C S Armines)
Chiller drop ‐ in test � R32 test under 45C ambient was able to perform with liquid receiver configuration. (S (Source: AREP Report No. 46, CES Armines) AREP R t N 46 CES A i )
Summary � Equipment covered: – Rooftop units (6) – Split ducted system (3) – Water chiller (1) – Refrigeration products (1) � Test reports published: – 9 reports were approved and published as of mid ‐ October (11 HAT reports 9 reports ere appro ed and p blished as of mid October (11 HAT reports are expected in Phase II). – 30 reports in total for Phase II � AHRI will hold a public event, the Low ‐ GWP AREP II Conference, on p January 21, 2016 in Orlando, FL. – 18 Test companies will present their test results to the public in the meeting. � Reports are available to the public on AHRI website � Reports are available to the public on AHRI website http://www.ahrinet.org/site/514/Resources/Research/AHRI ‐ Low ‐ GWP ‐ Alternative ‐ Refrigerants ‐ Evaluation
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