A solar assisted heat pump drying system forgrain in-store drying |
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Authors: | Haifeng LI Yanjun DAI Jianguo DAI Xibo WANG Lei WEI |
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Affiliation: | 1.Institute of Refrigerationand Cryogenics, Shanghai Jiao Tong University, Shanghai 200240, China; 2.China Grain ReservesCorporation, Beijing 100040, China; 3.Henan Weilai MachineEngineering, Co., LTD, Zhengzhou 450001, China; |
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Abstract: | For grain in-store drying, a solar assisted drying process has been developed, which consists of a set including a solar-assisted heat pump, a ventilation system, a grain stirrer, etc. In this way, low power consumption, short cycle time and water content uniformity can be achieved in comparison with the conventional method. A solar-assisted heat pump drying system has been designed and manufactured for a practical granary, and the energy consumption performance of the unit is analyzed. The analysis result shows that the solar fraction of the unit is higher than 20%, the coefficient of performance about system (COPS) is 5.19, and the specific moisture extraction rate (SMER) can reach 3.05 kg/kWh. |
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Keywords: | solar energy heat pump airflow in-store drying |
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