Knowing from measured data of the units that the cooling capacity, heating capacity, input power, COP and other parameters are associated with the ambient temperature, analyzes the effect of the outdoor sunk room size to the heat pump unit by studying the ambient temperature and then to the inlet air temperature of the unit. Establishes the CFD model according to the actual size, and analyzes the influence of room size on the unit heat release with twelve examples. The results show that the larger the distance between the air inlet side and the wall the more advantageous, while the amplitude of the advantage gonging smaller, therefore taking 3 m to 5 m as the setting value is appropriate; the smaller the room depth the more favorable, suggesting that the minimum depth can be set as the heat pump unit installation limit.%通过机组实测数据可知,制冷量、制热量、输入功率、COP等参数均与环境温度有关,通过研究环境温度进而是机组的进风温度来分析室外下沉式机房尺寸对空气源热泵机组散热的影响.按照实际尺寸建立CFD模型,通过12个算例分析了机房尺寸对热泵机组散热的影响.结果表明,进风侧与墙体之间的间距越大对机组散热越有利,但有利幅度逐步变小,因此该间距取3～5 m较合适;机房深度越小对散热越有利,按能够安装热泵机组的最小深度取值即可.
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