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分析了水源热泵机组变工况运行特性,以重庆市和成都市为例计算了采用月平均水温进行选型的热泵机组在全年水温变化情况下所能提供的制冷、制热量。结合不同规模办公建筑、酒店建筑、商场建筑3种典型公共建筑全年逐时空调冷、热负荷的分布特点,分析了热泵机组在最不利水温下的制冷、制热量与建筑负荷侧需求的关系。在分析其全年制冷期和制热期的不保证时间和保证率的基础上确定了合理的取水温度设计值。
The operation characteristics of water source heat pump units under different working conditions were analyzed. Taking Chongqing and Chengdu as an example, the cooling and heating capacities provided by the monthly mean water temperature of the heat pump units under the annual water temperature variation were calculated. Combining with the distribution characteristics of hourly air conditioners cooling and heating loads in three typical public buildings of different scale office buildings, hotel buildings and shopping mall buildings, the relationship between the cooling and heating capacity of heat pump units under the most unfavorable water temperature and the demand of construction load side is analyzed . Based on the analysis of the non-guaranteed time and guarantee rate of its annual refrigeration and heating periods, a reasonable design value of water intake temperature was determined.