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.
Haifeng LI, Yanjun DAI, Jianguo DAI, Xibo WANG, Lei WEI,
. A solar assisted heat pump drying system for
grain in-store drying[J]. Frontiers in Energy, 2010
, 4(3)
: 386
-391
.
DOI: 10.1007/s11708-010-0003-3