微通道平板集热器太阳能热水系统模拟分析

Simulation analysis of solar water heating system with micro-channel flat-plate collector

以丽江市某农村居住建筑为研究对象,设计了一种微通道平板集热器太阳能热水系统,并使用TRNSYS仿真软件建立了该系统仿真模型,采用控制变量法模拟分析了不同集热器设计参数对集热器出口温度及集热效率的影响。结果表明:集热器面积分别为2m^(2)、3m^(2)、4m^(2)时,集热器最大出口温度分别为58.2℃、77.6℃、95.7℃,最大集热效率分别为67.6%、63.5%、59.4%;集热器进口温度分别为15℃、20℃、25℃时,集热器最大出口温度分别为58.2℃、62.4℃、66.5℃,最大集热效率分别为65.6%、64.4%、63.1%;集热器进口流量分别为20kg/h、25kg/h、30kg/h时,集热器最大出口温度分别为58.2℃、50℃、44.5℃,最大集热效率分别为65.6%、66.6%、67.2%;集热器倾角分别为30°、45°、60°时,集热器最高出口温度分别58.8℃、61.4℃、54.0℃,最大集热效率分别为66.9%、70.7%、59.6%。

Taking a rural residential building in Lijiang as research object,a solar water heating system with microchannel flat-panel collectors was designed,the TRNSYS simulation software was used to establish the simulation model of the system,and the control variable method was used to simulate and analyze different collectors.Influence of design parameters on collector outlet temperature and collector efficiency.The results show that when the collector area is 2 m^(2),3 m^(2) and 4 m^(2) respectively,the maximum outlet temperature of the collector is 58.2℃,77.6℃ and 95.7℃ respectively,and the maximum collector efficiency is 67.6%,63.5% and 59.4% respectively.When the inlet temperatures are 15℃,20℃ and 25℃,the maximum outlet temperatures of the collector are 58.2℃,62.4℃,and 66.5℃.respectively,and the maximum collector efficiencies are 65.6%,64.4% and 63.1%respectively;At 20 kg/h,25 kg/h and 30 kg/h,the maximum outlet temperatures of the collectors are 58.2℃,50℃ and 44.5℃ respectively,and the maximum collector efficiencies are 65.6%,66.6% and 67.2% respectively;At 30°,45°and 60°,the maximum outlet temperatures of the collector are 58.8℃,61.4℃ and 54.0℃,respectively,and the maximum collector efficiencies are 66.9%,70.7%and 59.6% respectively.The system was shown high in heat collection efficiency,and its performance is better than that of traditional flat plate collector hot water system,which can significantly improve the heat utilization efficiency of new energy.