用于低温环境下的双级压缩风冷热泵热水器  

Two-stage Compression Air Source Heat Pump Water Heater Used in Low Temperature Environment

作　　者：王伟[1] 金苏敏[1] 陈建中[1] 

机构地区：[1]南京工业大学,江苏南京210009

出　　处：《流体机械》2005年第9期62-66,共5页Fluid Machinery

摘　　要：针对普通风冷热泵热水器低温环境下的应用问题,提出了双级压缩热泵热水器系统,并在系统的双级压缩循环热力学分析基础上,给出了系统性能评价系数和各部件火用损失的计算式。通过对设定运行工况的计算,得出:系统在冷凝温度60℃和蒸发温度-30℃工况下,性能系数大于2,系统有用能损失主要集中于冷凝器端,高低压两压缩机火用损之和不到系统总火用损的1/3。With the problem that the plain air source heat pump water heater used in the low temperature, this paper presents two-stage compression air source heat pump water heater. Based on the thermodynamically analysis of the two - stage compression cycle, the formula of performance evaluation coefficient and exergy loss are proposed. According to the calculation under the setting condition, the results indicate that the performance coefficient is over 2 when the condensation temperature is 60℃ and the evaporation temperature is - 30℃. The exergy loss of the system focuses on the condenser, and the sum of exergy loss of the high and low pressure compressors is below one- third of the total exergy loss.

关 键 词：热泵热水器 双级压缩 热力学分析 

分 类 号：TH3[机械工程—机械制造及自动化]