A solar assisted heat pump drying system for grain in-store drying

2010, Volume 4, Issue 3

Abstract

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Frontiers in Energy >> 2010, Volume 4, Issue 3 doi: 10.1007/s11708-010-0003-3

A solar assisted heat pump drying system for grain in-store drying

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;

Available online: 2010-09-05

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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 (COP) is 5.19, and the specific moisture extraction rate (SMER) can reach 3.05 kg/kWh.

Keywords

solar energy ; heat pump ; airflow ; in-store drying

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