Thermal performance parameters for a solar‐assisted heat pump (SAHP) drying system with underground thermal energy storage (TES) tank and heat recovery unit (HRU) are investigated in this study. The SAHP drying system is made up of a drying unit, a heat pump, flat plate solar collectors, an underground TES tank, and HRU. An analytical model is developed to obtain the performance parameters of the drying system by using the solution of heat transfer problem around the TES tank and energy expressions for other components of the drying system. These parameters are coefficient of performances for the heat pump (COP) and system (COPs), specific moisture evaporation rate (SMER), temperature of water in the TES tank, and energy fractions for energy charging and extraction from the system. A MATLAB program has been prepared using the expressions for the drying system. The obtained results for COP, COPs, and SMER are 5.55, 5.28, and 9.25, respectively, by using wheat mass flow rate of 100 kg h⁻¹, Carnot efficiency of 40%, collector area of 100 m², and TES tank volume of 300 m³ when the system attains periodic operation duration in fifth year onwards for 10 years of operation. Annual energy saving is 21.4% in comparison with the same system without using HRU for the same input data.

中文翻译：

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带有热能储罐和热回收单元的太阳能辅助热泵干燥系统的热性能

本研究研究了带有地下储热罐（TES）和热回收单元（HRU）的太阳能辅助热泵（SAHP）干燥系统的热性能参数。SAHP干燥系统由干燥单元，热泵，平板太阳能收集器，地下TES储罐和HRU组成。通过使用TES储罐周围的传热问题和干燥系统其他组件的能量表达式，开发了一个解析模型以获得干燥系统的性能参数。这些参数是热泵（COP）和系统的性能系数（COPs），比湿气蒸发率（SMER），TES储罐中的水温以及用于能量充入和从系统提取的能量分数。使用干燥系统的表达式准备了MATLAB程序。使用100 kg h的小麦质量流量，获得的COP，COP和SMER的结果分别为5.55、5.28和9.25。^-1，当系统在第五年开始达到定期运行持续时间达10年时，卡诺效率为40％，收集器面积为100 m ²，TES储罐容量为300 m ³。与不对相同输入数据使用HRU的相同系统相比，年节能量为21.4％。