多腔主动蓄放热系统优化设计与性能分析  

Optimized Design and Performance Analysis of Active Heat Energy Storage-release System with Multi-cavity Structure

作　　者：桑硕 程瑞锋[1] 方慧[1] 张义[1] 王超 于永会[1] SANG Shuo;CHENG Rui-feng;FANG Hui;ZHANG Yi;WANG Chao;YU Yong-hui(Institute of Environment and Sustainable Development in Agriculture/Key Laboratory of Energy Conservation&Waste Management of Agricultural Structures,MARA,P.R.China,Chinese Academy of Agricultural Sciences,Beijing 100081,China)

机构地区：[1]中国农业科学院农业环境与可持续发展研究所/农业农村部设施农业节能与废弃物处理重点实验室,北京100081

出　　处：《沈阳农业大学学报》2023年第3期296-304,共9页Journal of Shenyang Agricultural University

基　　金：国家重点研发计划战略性科技创新专项(2020YFE0203600);中央级公益性科研院所基本科研业务费项目(Y2023PT22);“天池英才”引进计划项目(2023)。

摘　　要：主动蓄放热系统是温室太阳能高效热利用的一种设备,为了改良集热板结构,提升集热量和主动蓄放热系统的各项性能,以集热效率提升为目标,首先进行主动蓄放热系统集热板连接结构和流道设计优化,然后进行系统集成设计与加工制作,并在温室中对其进行性能测试。通过集热板内沿程阻力与对流换热系数关系的模拟计算,确定长16 mm和宽4 mm的圆角矩形作为集热板横截面腔室结构尺寸,管板插接激光焊作为集热板组装工艺。温室现场测试结果表明:在北京地区,冬至日以后的49 d内,多腔主动蓄放热系统的平均集热效率达到79.5%,以温室建筑面积计算,该系统日平均集热量为1.0 MJ·m^(-2),平均放热功率为23.9 W·m^(-2);该系统平均放热能效比为5.4,与电加热加温方式相比,平均节能率为81.2%。主动蓄放热系统的关键性改进优化可改善放热性能,系统运行稳定性、耐久性进一步提高,为主动蓄放热系统规模化应用提供技术支撑。Active Heat energy Storage-release system(AHS)is a kind of equipment for efficient thermal utilization of solar energy in greenhouse.In order to improve the structure of the heat collecting plate and improve the performance of the AHS,with the improvement of heat collection efficiency as the goal,the connection structure and flow channel design optimization of the heat collecting plate of the AHS and release system were firstly carried out,and then the system integration design and manufacture were carried out.And the performance of AHS with multi-cavity structure was tested in a Chinese Solar Greenhouse(CSG).By simulating the relationship between the along-range resistance and convective heat transfer coefficient inside multi-cavity structure,a rectangle cavity with rounded corner of 16 mm in length and 4 mm in width was determined.And tube and plate insertion with laser welding was used as the assembly process of heat collecting plate Test results in CSG showed that the average heat collection efficiency of AHS with multi-cavity structure was 79.5%within 49 days test in winter in Shunyi district,Beijing.Based on ground area of greenhouse,the average daily heat energy collected by this system was1.0 MJ·m^(-2),and the average daily heat energy released power is 23.9 W·m^(-2).The average coefficient of performance of this system during test time was 5.4,and the average energy saving rate is 81.2%compared with electrical heating method.The key optimization design of the AHS can improve the heat release performance,further improve the stability and durability of the system,and provides technical support for the large-scale application of the system.

关 键 词：日光温室 主动蓄放热系统 太阳能 加温 

分 类 号：S214.3[农业科学—农业机械化工程]