摘  要  對結霜工況下空氣源熱泵系統動態性能進行了數值模擬和實驗研究， 分析比較了不同結霜工況條件下空氣源熱泵空
調器的動態性能、循環參數、蒸發器結霜量及結霜厚度。實驗數據與數值預測結果的比較表明，在結霜循環后期，蒸發器表
面霜層厚度快速生長，數值模擬結果與實驗結果的變化趨勢是一致的。熱泵系統動態性能及循環參數的數值模擬與實驗結果
在霜層勻速生長段符合度較好，驗證了數值模擬的合理性。而在結霜循環后期，霜層快速生長，熱泵機組性能數值模擬結果
出現了較大誤差，其主要原因是，在霜層生長模型中未考慮霜晶形態變化的影響。
關鍵詞  空氣源熱泵  結霜工況  數值模擬
 
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