可燃性冷媒R32泄漏速度对室内安全性的影响研究
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摘要
R32制冷剂具有良好的热工性能,但是由于R32具有可燃性,应从其泄漏时安全性的角度进行研究。采用实验研究的方法,研究了家用多联机空调系统在室内泄漏时,R32制冷剂不同的泄漏速度对室内各水平面的安全性的影响。结果表明:当泄漏速度为15～90L/min时,各监测平面的R32浓度值都会超过可燃上限(UFL)31.0%。在0.15和1.15m平面,泄漏速度在45L/min附近时,室内安全性最低,泄漏速度较快和较慢都有更高的安全性;在2m平面,泄漏速度在15L/min附近时,室内安全性最低,泄漏速度越快安全性越高。当泄漏速度较快时,各个平面安全性都较高;当泄漏速度较慢时,在1.15和2m较高的平面安全性较低,在0.15m较低的平面安全性较高,总体来说泄漏速度越快室内安全性越高。
R32 refrigerant has good thermal performance, but due to its flammability, its safety as the leakage should be studied.In this paper, the effect of R32 refrigerant leakage rate on the safety of each level of indoor air conditioning system was studied experimentally.The results show that when the leakage speed is 15 ～ 90 L/min, the R32 concentration of each monitoring plane is higher than UFL(31.0%).In planes 0.15 and 1.15 m, when the leakage speed is around 45 L/min, the indoor safety is the lowest, and the leakage speed is faster and slower with higher safety.In the 2 m plane, when the leakage speed is around 15 L/min, the indoor safety is the lowest, and the faster the leakage speed, the higher the safety.When the leakage speed is faster, the safety of each plane is higher.When the leakage speed is relatively slow, the plane security at 1.15 and 2 m is relatively low, and the plane security at 0.15 m is relatively high. In general, the faster the leakage speed, the higher the indoor security.
R32 refrigerant has good thermal performance, but due to its flammability, its safety as the leakage should be studied.In this paper, the effect of R32 refrigerant leakage rate on the safety of each level of indoor air conditioning system was studied experimentally.The results show that when the leakage speed is 15 ～ 90 L/min, the R32 concentration of each monitoring plane is higher than UFL(31.0%).In planes 0.15 and 1.15 m, when the leakage speed is around 45 L/min, the indoor safety is the lowest, and the leakage speed is faster and slower with higher safety.In the 2 m plane, when the leakage speed is around 15 L/min, the indoor safety is the lowest, and the faster the leakage speed, the higher the safety.When the leakage speed is faster, the safety of each plane is higher.When the leakage speed is relatively slow, the plane security at 1.15 and 2 m is relatively low, and the plane security at 0.15 m is relatively high. In general, the faster the leakage speed, the higher the indoor security.
引文
[1] ZHANG Wang, YANG Zhao, LI Jin, et al. Research on the flammability hazards of an air conditioner using refrigerant R-290 [J]. International Journal of Refrigerantion, 2013, 36(5):1483-1494.
[2] BASKARAN A,KOSHY P. A performance comparison of vapour-compression refrigerants [J]. International Communications in Heat and Mass Transfer, 2010, 37:1340-1349
[3] 马一太, 王伟. 制冷剂的替代与延续技术[J].制冷学报,2010,31(5): 11-17.
[4] Atul S. Padalkar, Kundlik V. Mali. Simulated and experimental performance of split packaged air conditioner using refrigerant HC-290 as a substitute for HCFC-22[J]. Applied Thermal Engineering, 2014,62:277-284.
[5] ANSI/ASHRAE Standard 34-2016. Designation and safety classification of refrigerants [S]. Atlanta: ASHRAE, 2016:16-32.
[6] 杨昭, 彭继军, 张甫仁. 制冷剂有限时间泄漏扩散模型[J]. 天津大学学报, 2006, 39(6): 657-662.
[7] 田贯三,杨昭,马一太,等. 制冷系统可燃工质泄漏喷射过程的模拟研究[J]. 工程热物理学报,2000,(04):401-404.
[8] LIU Q, ZHANG H, LIU Y, et al. Influencing factors of flammable refrigerants leaking in building air conditioning system, J. Procedia Engineering. 62(2013) 648-654.
[9] 金梧凤,贾利芝,张燕. 空调送风速度和送风角度对可燃性冷媒R32泄漏扩散规律的影响[J]. 化工学报,2015,66(06):2351-2358.
[10] 刘知新, 郭春辉,等. R290家用空调器泄漏安全性实验研究[J]. 制冷与空调, 2010,:10(5):49-51.
[11] 金梧凤,袁小勇,等. 门窗开启对室内R32浓度分布的影响[J]. 低温与超导, 2018, 46(02): 92-96.
[2] BASKARAN A,KOSHY P. A performance comparison of vapour-compression refrigerants [J]. International Communications in Heat and Mass Transfer, 2010, 37:1340-1349
[3] 马一太, 王伟. 制冷剂的替代与延续技术[J].制冷学报,2010,31(5): 11-17.
[4] Atul S. Padalkar, Kundlik V. Mali. Simulated and experimental performance of split packaged air conditioner using refrigerant HC-290 as a substitute for HCFC-22[J]. Applied Thermal Engineering, 2014,62:277-284.
[5] ANSI/ASHRAE Standard 34-2016. Designation and safety classification of refrigerants [S]. Atlanta: ASHRAE, 2016:16-32.
[6] 杨昭, 彭继军, 张甫仁. 制冷剂有限时间泄漏扩散模型[J]. 天津大学学报, 2006, 39(6): 657-662.
[7] 田贯三,杨昭,马一太,等. 制冷系统可燃工质泄漏喷射过程的模拟研究[J]. 工程热物理学报,2000,(04):401-404.
[8] LIU Q, ZHANG H, LIU Y, et al. Influencing factors of flammable refrigerants leaking in building air conditioning system, J. Procedia Engineering. 62(2013) 648-654.
[9] 金梧凤,贾利芝,张燕. 空调送风速度和送风角度对可燃性冷媒R32泄漏扩散规律的影响[J]. 化工学报,2015,66(06):2351-2358.
[10] 刘知新, 郭春辉,等. R290家用空调器泄漏安全性实验研究[J]. 制冷与空调, 2010,:10(5):49-51.
[11] 金梧凤,袁小勇,等. 门窗开启对室内R32浓度分布的影响[J]. 低温与超导, 2018, 46(02): 92-96.