摘  要  对结霜工况下空气源热泵系统动态性能进行了数值模拟和实验研究， 分析比较了不同结霜工况条件下空气源热泵空
调器的动态性能、循环参数、蒸发器结霜量及结霜厚度。实验数据与数值预测结果的比较表明，在结霜循环后期，蒸发器表
面霜层厚度快速生长，数值模拟结果与实验结果的变化趋势是一致的。热泵系统动态性能及循环参数的数值模拟与实验结果
在霜层匀速生长段符合度较好，验证了数值模拟的合理性。而在结霜循环后期，霜层快速生长，热泵机组性能数值模拟结果
出现了较大误差，其主要原因是，在霜层生长模型中未考虑霜晶形态变化的影响。
关键词  空气源热泵  结霜工况  数值模拟
 
NUMERICAL SIMULATION AND EXPERIMENTAL VERIFICATION  
ON FROSTING CONDITION PERFORMANCE OF AIR SOURCE HEAT
PUMP
Zhao Yang   Guo Xianmin   Wang Chengsheng
 
(Tianjin University of Commerce, Tianjin Key Laboratory of Refrigeration Technology, Tianjin 300134)
Abstract   The dynamic performances of an air source heat pump (ASHP) system under frosting conditions were
simulated. A series of experiments were conducted to verify the present simulation model. The dynamic performance
and cycle parameters of the ASHP system under frosting conditions, the frost thickness and the frost mass accumulation
on the outdoor coils were analyzed and compared. The comparison between the experimental and simulated results
indicates that the frost thickness on the surface of evaporator grows rapidly at the end of the frosting cycle. And the
simulated frost thickness is agreement with the experimental data. The simulated results and cycle parameters of the
dynamic performances are compared favorably with the experimental data at the second frosting stage. The numerical
simulation is verified to be reasonable. With the rapid growth of the frost thickness at the end of the frosting cycle,
numerical simulation of the ASHP results in a larger error which is because of the change of frosting shape which is not
taken into account in the simulation model.
Keywords    Air source heat pump    Frosting condition    Numerical simulation