摘要
由于非稳态传热问题通过理论计算得到解析解较困难,本文运用数值模拟方法研究定温放水型直流式系统中平板型太阳能集热器的工作状况,讨论了集热器的管径和管中心距在非稳态传热条件下对集热器的效率和每平方米产水量的影响。可得到结论扁盒式集热器具有较高效率;相同条件下,管径越大集热器效率越高。该结果有利于优化直流式平板集热器的设计参数。
As it is difficult to solve the problem of unsteady-state heat transfer in theory,study of flat plate solar collectors in series-connected system with intermittent output is conducted by numerical simulation.Under the unsteady-state heat transfer condition,the impact of the diameter and center distance of solar collectors on the instantaneous collector efficiency and water production rate per square meter are discussed respectively.The results show that flat cartridge collector performed high effeciency.And under the same conditions,the larger the diameter of collector is,the higher efficiency will be.These can be used for optimizing design parameters of flat plate solar collectors.
出处
《节能技术》
CAS
2011年第1期20-23,41,共5页
Energy Conservation Technology
基金
甘肃省自然科学基金项目(2008GS02621)
关键词
直流式系统
平板型太阳能集热器
非稳态传热
series-connected system
flat plate solar collectors
unsteady-state heat transfer
