相变贮热在热泵干燥机组中的应用研究

热泵干燥既能节约能量又可提高产品的质量，当干燥温度满足干燥要求后，热泵干燥机组往往通过排放掉一部分热量来维持干燥温度的稳定，这样降低了热泵干燥的能源利用效率，利用相变材料相变热效应，回收这部分能量，而且又在机组需要热量时将贮存的能量释放给干燥空气，实验结果证明了相变材料在热泵干燥机组中的应用具有明显的节能潜力。

STUDY ON HEAT PUMP DRYING COUPLED WITH LATENT HEAT STORAGE

The heat pump drying method has the advantages of saving energy as well as improving product quality.Howev er,when the drying temperature meets the demand of the drying in order to keep the drying temperature stable,the heat pump drying system often discharges some residual heat,therefore the energy saving effect of the heat pump system de clines. In this paper,by taking advantage of latent heat storage,the residual heat is recovered,thus it can be discharged into the drying air during the later stage of a drying process.Experiment results demonstrate that the application of latent heat storage using phase change materials in the heat pump drying system is very promising.