1、VC Activity of HFO1234yf,May 2009 I 2,Content,HFO1234yf specification Calorimeter performance System performance NVH test Durability test Summary,1. HFO1234yf specification,May 2009 I 4,Comparison with refrigerant characteristic,HFO1234 specification,R134a的臭氧消耗潜值为0，但是GWP（全球变暖潜值）高达1300多，而且在大气中的寿命也较长，
2、是京都协议确认逐步淘汰的制冷剂之一。在替换制冷剂研究领域，欧洲和美国走在前面，欧盟此前宣布：2010年起，在新车上淘汰 R134a, 采用GWP150的制冷剂，并倾向于CO2制冷， 但CO2制冷为跨临界制冷，对压缩机和系统的其他部件要求很高，替换成本很高，而且在一些条件下应用能效不高 。,May 2009 I 5,P-h diagram,Small refrigerating effect -25% High mass flow +1520%,HFO1234 specification,Specific volume,Capacity: -10% COP : -5%,R134a,1234yf,
3、2. Calorimeter performance,May 2009 I 7,Sample compressors specification,May 2009 I 8,Calorimeter performance DKV08R,Cooling capacity,OIL : Valeo200YF (for 1234yf)viscosity 16mm2/s 100degC,SC=5degC SH=10degC,-20% down at high load idle. Oil viscosity lower than current 200PG.,May 2009 I 9,Calorimete
4、r performance DKV08R,COP,SC=5degC SH=10degC,OIL : Valeo200YF (for 1234yf)viscosity 16mm2/s 100degC,-14% down at high load idle.,May 2009 I 10,Calorimeter performance DKS17DS,SC=5degC SH=10degC,Cooling Capacity,OIL : Valeo100YF (for 1234yf),Capacity is less than -10% at idle.,May 2009 I 11,Calorimete
5、r performance DKS17DS,SC=5degC SH=10degC,COP,OIL : Valeo100YF (for 1234yf),COP is less than 134a system -5%,May 2009 I 12,Calorimeter performance DCS17E,Cooling Capacity,OIL : Valeo100YF (for 1234yf),SC=5degC SH=10degC,Capacity is less than 134a system -10%,May 2009 I 13,Calorimeter performance DCS1
6、7E,COP,SC=5degC SH=10degC,OIL : Valeo100YF (for 1234yf),The COP is less than 134a system -5%,May 2009 I 14,Calorimeter performance summary,The cooling capacity is down about 10% and the COP is down about 5% at piston type.This result is due to the specification of 1234yf.Rotarys capacity is down 20%
7、 HLLS condition.Compressor volumetric Eff. is down.It is guessed that the condition of the oil seal became worse by 1234yf and new oil.,3. System performance,May 2009 I 16,Test condition,System performance DCS17E,TEWI condition,A/C system : Nissan AL (FUGA) Oil charge amount : 120cc Exp.V ; 1234yf :
8、 2.35barG at 0degC, 3.05barG at 10degC 134a : 2.15barG at 0degC, 2.85barG at 10degC (Current),May 2009 I 17,Capacity & COP,System performance DCS17E,High load capacity is 57% down same as calorimeter. Partial condition COP is 10% up.,May 2009 I 18,Fuel consumption,System performance DCS17E,10% fuel
9、saving impact.,May 2009 I 19,System performance summary,The cooling capacity is down 57% at high load. The COP is the better 10% for partial st. condition.Possible to reduce the annual power consumption.,4. NVH,May 2009 I 21,DKV08R result at RPM tracking,Noise and Vibration(0-2kHz),Above noise dB(A)
10、,Vertical vibration dB_m/s2,R134a: Pd/Ps=2.00/0.36MPaG 1234yf: Pd/Ps=1.88/0.35MPaG,Almost same NVH 1234yf and R134a at DKV08R,May 2009 I 22,DKS17DS result at RPM tracking,Noise and Vibration (0-2kHz),Above noise dB(A),Axial vibrationdB_m/s2,R134a: Pd/Ps=2.00/0.36MPaG 1234yf: Pd/Ps=1.88/0.35MPaG,1234
11、yfs peak band 700800Hz lower than R134a.,May 2009 I 23,DCS17E result at RPM tracking,Noise & Vibration (0-2kHz),Above noise dB(A),Vertical vibration dB_m/s2,1234yfs peak band 8001000Hz lower than R134a.Relates Dis.valeve from reduced Pd pulsation.,R134a: Pd/Ps=2.00/0.36MPaG 1234yf: Pd/Ps=1.88/0.35MP
12、aG,May 2009 I 24,NVH summary,Result summary table compared with R134a,Piston type compressor is better than R134a. Rotary is same level R134a.,5. Durability test result,May 2009 I 26,DKV08R result table,Durability test,Durability tests have completed for duration time. There is no deterioration in t
13、he function.,Summer test 40.000miles in Arizona has completed,May 2009 I 27,DKS17DS result table,Durability test,Both durability tests have completed for duration time. There is no deterioration in the function. No color change to black inner parts.,May 2009 I 28,DCS17E Durability test result table,
14、Durability test,All durability tests have completed for duration time. There is no deterioration in the function. Some inner parts color changed black at high temp. room.,Heavyblackedlightly,DCS17E,May 2009 I 29,Durability test,#4 9500 ON/OFF finished comp. inner part photo,Each parts surface color
15、changed blackat high temperature room.,May 2009 I 30,Durability result summary,All Products have completed.And there are no deterioration in the function. Rotary succeed Summer test There was no problem O-ring, gasket, lip-seal, ECV. Investigated by each suppliers. Caution : Compatibility PAG,1234yf
16、 and plastics Chemical stability to be investigated.,May 2009 I 31,1234yf Next Steps,All types product are ready to launch A/C system development Long durability & Reliability confirmed Putting IHE is one option to catch up full load capacity The best oil will be selected by Q3 2009 The inner material of A/C Hose is required to be reliable design by hose suppliers,End,
