摘要
讨论了在不同换热器类型、防冻液种类、浓度和温度条件下循环液物性参数对换热的影响。通过引入传热衰减系数 ,讨论了添加防冻剂对热泵机组换热器换热效果的影响 ,并分别在制冷工况和制热工况下给出了不同种类和浓度的防冻液所对应的换热面积修正系数和循环水泵功率的变化。
The influence on heat pump performance is discussed of the kinds, concentration and temperature of antifreezes as well as heat exchanger types. An overall heat transfer degradation factor DU, is presented to describe quantitatively heat transfer attenuation in heat exchangers of the heat pump system caused by antifreezes. The required increases in the heat transfer area and the pumping power are also analyzed under different conditions.
出处
《制冷与空调》
2004年第2期17-21,共5页
Refrigeration and Air-Conditioning
