空气源热泵冷热水机组供热最佳能量平衡点的研究

在总结前人研究空气源热泵能量平衡点的基础上，提出了最佳能量平衡点的概念，建立了空气源热泵最佳能量平衡点的数学模型并对其进行了敏感性分析，统计分析了我国适用空气源热泵各地区的气候特点和我国现行空气源热泵冷热水机组的整机特性，求解出了我国适用空气源热泵各地区最佳能量平衡点温度。

Study on heating optimal energy balance point of the water heater/chiller units of air source heat pump

By summarizing the achievements in the study on energy balance point the concept of optimal energy balance point is put forwards, the mathematical model of it developed and then sensitivity analysis of mathematics model made, that is to say, effects on mathematics model of several factors such as loss coefficient of frosting and defrosting, BIN parameter, cut temperature, outdoor design temperature, heat transfer coefficient of building envelop, application condition and etc. are analyzed. Secondly, in order to understand the whole unit performance of the water heater/chiller units of air source heat pump used in China, a series of experiment data on the water heater/chiller units of air source heat pump used in China has been collected, then the function curves of COP (Coefficient of Performance) are regressed linearly. At last a program calculating the optimal energy balance point temperature is developed and the optimal energy balance point temperatures corresponding to potential regions for air source heat pump are obtained with electric boiler as assistant heat source, which are recommended as design reference data for choosing the water heater/ chiller units of air source heat pump. That is to say, the maximum HSPF can be gotten if the water heater/chiller units of air source heat pump are selected according to the optimal energy balance point temperature. But, to our attention, the optimal energy balance point temperature may change in case of oil boiler, gas boiler and others.