R32在带闪蒸器的风冷冷热水机组中的应用研究

摘要

从理论方面分析了R32在制热尤其是低温制热方面的优势,同时指出低温制热下R32系统受到排气温度过高的限制。作者提出采用闪蒸器的方法降低排气温度,将R32和R410A分别应用在带闪蒸器的风冷冷热水机组中进行试验研究。试验结果表明,压缩机排量相当的情况下,R32机组名义工况下能力及性能系数均略有提高,且名义制热工况下提高幅度更高,R32在制热方面更有优势；环境温度越低,R32机组制热量提高幅度越大,R32在低温制热方面更有优势,而且R32的排气温度可以控制在可以接受的范围内。%The advantage of R32 in heating conditions especially in low air temperature heating conditions was theoretically ana-lyzed. This application was limited because of higher discharge temperature of R32. it was suggested that discharge temperature was controlled with a flash tank. Comparative test was conducted in air cooled chiller with a flash tank using R32 and R410A re-spectively. The results indicate that with the almost same compressor discharge volume,the capacity and COP in nominal condi-tions of R32 unit is higher than R410A unit,the increase is much more in nominal heating condition,R32 unit takes advantage in heating conditions;when the air temperature is lower,the capacity increase of R32 unit is much more,R32 unit takes advantage in low air temperature heating conditions,the discharge temperature can also be controlled with a flash tank.