空气源热泵热水器双级压缩循环研究
Two-stage compression cycle for water heatersin air source heat pumps
摘要：
通过综合分析，选择将两级节流中间不完全冷却双级压缩循环应用于空气源热泵热水器以适应低温工况。算例计算结果表明，系统排气温度及各压缩机压缩比均优于普通单级循环系统，性能系数较高，系统具备一定的低温适应性。
关键词：空气源热泵,双级压缩,低温,压缩比
Abstract：
Based on a comprehensive analysis, applies the two-stage compression cycle with two stage throttling and midway incomplete cooling to air-source heat pump in order to fit to the low temperature environment. The calculation results of a case show that the exhaust temperature and the compression ratio of the two-stage system are better than those of the single-stage system, and that the performance coefficient of the two-stage system is higher, and that the cold-adaptability of the system is well to a certain extent.
Keywords:air-source heat pump，two-stage compression，low temperature，compression ratio