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对热压缩机中关键的换热过程建立了简化模型并进行了数值计算,计算得出声功及热效率随着小孔系数的变化存在最佳值,增大平衡压力和加热温度可以增大系统声功。建立了可测量声功的热压缩机实验系统,在不同的小孔系数下测量了声功,并对比分析了实验与数值结果,二者随小孔系数变化的趋势相同,但值相差较大。通过进一步的对比分析发现,这主要是实验中余隙容积过大和回热器换热不充分造成的,余隙容积和回热器传热效果对热压缩机性能的影响很大。
A simplified model was established for the critical heat transfer process in a thermosyphon and the numerical calculation was carried out. The results show that there is an optimum value for the sound power and thermal efficiency with the change of the foramina coefficient. Increasing the equilibrium pressure and the heating temperature can increase the system Sound power. An experimental system of thermo-compressor measuring sound power was established. The sound power was measured under different orifice coefficients. The experimental and numerical results were compared and analyzed. The trend of the two factors was the same with the change of orifice coefficient. However, . Through further comparative analysis, it is found that this is mainly due to the excessive clearance volume and insufficient regenerator heat exchange in the experiment. The clearance volume and the regenerator heat transfer effect greatly affect the performance of the thermal compressor.