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A solar assisted heat pump drying system for
grain in-store drying |
| Haifeng LI1,Yanjun DAI1,Jianguo DAI1,Xibo WANG2,Lei WEI3, |
| 1.Institute of Refrigeration
and Cryogenics, Shanghai Jiao Tong University, Shanghai 200240, China; 2.China Grain Reserves
Corporation, Beijing 100040, China; 3.Henan Weilai Machine
Engineering, 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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Issue Date: 05 September 2010
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