摘要
设计一套太阳能辅助热泵就仓干燥系统,并建立各个部件及谷物干燥的数学模型,分析了一套由100m^2真空管空气集热器和加热量为90kW的热泵组成的系统,在不同天气情况下的工作模式以及在典型晴天下的工作性能;结合谷物干燥模型模拟了谷物的初始湿含量为17%,初始温度为20℃,3000t谷物在10～15d内的干燥情况。得出:太阳能保证率可达到20%,系统平均加热量为120kW,COP可达到约4.14,降低1.5%的水分需要10d时间,降低2%的水分需要约15d时间。
A solar assisted heat pump for grain bin drying has been design. This system consists of 100m^2 evacuated tube collectors and heat pump system heating capacity for 90kW. The system＇ s work pattern changed with various weather condition, and the working performance in typical sunny day. Heat and mass transfer equations and drying rate equation of grain were used to develop a low temperature drying model have been presented. The performance of 3000t grain bin drying by solar assisted heat pump system in 10 - 15 days was simulated. The initial humidity ratio of grain is 17%, and the temperature is 20℃. The results showed that the solar fraction（SF） is about 20%, the average system＇ s heating capicity is 120kW, the COP can be 4.14, and it can be drying 1.5% moisture in 10days.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2010年第5期575-580,共6页
Acta Energiae Solaris Sinica
基金
"十一五"国家科技支撑计划项目(2006BAD08806-2)
关键词
太阳能辅助热泵
就仓干燥
谷物
低温干燥模型
solar assisted heat pump
bin drying
grain
low temperature drying model
