太阳能PV/T空气集热器干燥性能实验研究
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摘要
采用太阳能光伏光热(Photovoltaic/thermal,PV/T)空气集热器收集太阳辐射并转化为热能和电能,为干燥系统提供能量.以玫瑰花为干燥物料,通过实验探究了太阳能PV/T空气集热器的热、电特性以及玫瑰花的干燥特性.实验结果表明晴天工况下该集热器的热、电效率和综合效率分别为32.06%、7.66%和45.93%,其所产电能能够满足5个6 W的直流风机运行15.74 h,且干燥4.04 kg的玫瑰花所需的能量能够完全由太阳能提供.
A solar photovoltaic/thermal(PV/T) air collector was used to collect the solar radiation and convert them into heat and electricity for the solar drying system.With roses as the dry material,the thermal and electrical properties of the solar PV/T collector and the drying characteristics of the roses were investigated experimentally.According to the experimental results,the thermal,electrical and comprehensive efficiency of the collector were 32.06%,7.66% and 45.93%,respectively.The electric energy produced by the solar PV/T collector can meet the consume of 5 DC fans with 6 W for running 15.77 h.According to theoretical calculation,the thermal energy can be provided entirely by solar energy using the PV/T collector to dry roses of 4.04 kg.
A solar photovoltaic/thermal(PV/T) air collector was used to collect the solar radiation and convert them into heat and electricity for the solar drying system.With roses as the dry material,the thermal and electrical properties of the solar PV/T collector and the drying characteristics of the roses were investigated experimentally.According to the experimental results,the thermal,electrical and comprehensive efficiency of the collector were 32.06%,7.66% and 45.93%,respectively.The electric energy produced by the solar PV/T collector can meet the consume of 5 DC fans with 6 W for running 15.77 h.According to theoretical calculation,the thermal energy can be provided entirely by solar energy using the PV/T collector to dry roses of 4.04 kg.
引文
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[2] 郭雪霞,王伟华,刘瑜,等.不同太阳能干燥温度对南美白对虾理化特性和干燥能耗的影响[J].中国调味品,2017,42(12):79-83.
[3] 郭雪霞,王伟华,刘瑜,等.不同太阳能干燥风速对南美白对虾理化特性和干燥能耗的影响[J].食品科技,2017,42(10):133-137.
[4] 王伟华,王海,何思鲁,等.南美白对虾太阳能干燥能耗参数优化及中试[J].农业工程学报,2016,32(18):271-278.
[5] 谢超超,孙雨凡,罗建文,等.太阳能干燥装置的PID和双金属片控制对比分析[J].西北大学学报:自然科学版,2016,46(6):847-851.
[6] 郝文刚,陆一锋,赖艳华,等.直接式太阳能干燥系统的热性能分析及应用[J].农业工程学报,2018,34(10):187-193.
[7] DUFFIE J A,BECKMAN W A.Solar engineering of thermal processes[M].Fourth Edition.United States:John Wiley & Sons,Inc.,2013.
[8] 蒋维钧,雷良恒,刘茂林,等.化工原理[M].北京:清华大学出版社,2010.
[9] 叶明同(Vilaythong).老挝香蕉太阳能干燥系统性能的分析研究[D].昆明:云南师范大学,2018.
[10] 史艳珍,任广跃,段续,等.小型移动式粮食干燥机的设计[J].干燥技术与设备,2013,11(6):3-8.