铝排管集热器吸收太阳能、空气能和环境能研究

Study on the Absorption of Solar Energy,Air Energy and Environmental Energy by Aluminum Tube Collector

对无透光和保温材料封装的新型铝排管平板集热器进行吸热特性分析,建立了吸收太阳能、空气能和环境能的数学模型,并分析了流体滞止特性对平板集热器吸收空气能的影响。进一步针对铝排管平板集热器的设计参数,通过TRNSYS软件进行仿真。在TRNSYS软件中对于影响集热器吸热性能的参数进行了单一变量分析。仿真结果显示:该平板集热器集热效率相比普通集热器大大提高。风速对空气能吸收量影响较大,风速越大,滞止温度越高,空气能吸收量越多;辐射量对太阳能吸收量影响作用明显,但对环境能吸收有减小趋势;集热面积增大和集热器整体性能提升有很大的关联作用;环境温度对环境能吸收量有很大的决定作用;入口流量对集热性能的提升存在峰值影响力,而进口温度的增加会降低集热器的集热效率。该平板集热器通过实际应用表明,其性能与仿真结果相符,且能够大大提高集热器效率。

The heat absorption characteristics of a new type of flat plate collector with aluminium exhaust tubes packaged with non-transparent and thermal insulation materials are analyzed.The mathematical models of absorbing solar,air and environmental energy are established.The influence of fluid stagnation characteristics on the air energy absorption of flat plate collector is studied and analyzed.The mathematical model is verified by TRNSYS software.Aiming at the design parameters of flat plate collector with aluminium row tubes,the single variable analysis of the parameters affecting the heat absorption performance of the collector is carried out in TRNSYS software.The results show that the overall collection efficiency of the flat plate collector is much higher than that of the ordinary collector.Wind speed has a great influence on the air energy absorption.The larger the wind speed is,the higher the stagnation temperature is,the more the air energy absorption is.Radiation has an clear effect on the solar energy absorption,but it has a decreasing trend on the environmental energy absorption.The increase of the collector area has a great correlation with the improvement of the overall performance of the collector.The environmental temperature has a great effect on the environmental energy absorption.The inlet flow rate has a peak influence on the improvement of collector performance,and the increase of inlet temperature will reduce the collector efficiency.At the practical application,the performance of the flat plate collector is also consistent with the simulation results,and the efficiency of the collector is greatly improved.