屋顶式空气集热系统的优化设计分析  

Optimization Design of Rooftop Air Heating System

作　　者：章永洁[1] 叶建东[1] 蒋建云[1] 付萌[1] 张帆[1] 

机构地区：[1]北京市可持续发展促进会,北京100084

出　　处：《建筑节能》2015年第1期48-51,共4页BUILDING ENERGY EFFICIENCY

基　　金：国家科技支撑计划课题(2013BAC17B02);北京市科技计划项目(Z131100004213005)

摘　　要：从送风方式、集热器面积、集热器内空气流速等方面对屋顶式空气集热系统进行了优化设计，并对某典型农宅进行了测试分析。结果表明，采用高效的屋顶空气集热器，采用上送下回（向下送风）的送风方式、集热器内流速在4～6 m/s时，集热系统的效率基本在20%左右，在室内设计温度为14℃的条件下，太阳能贡献率达44%。该系统结构简单、价廉、安装方便且易于维护，可有效地利用屋面面积，适于农村新建房屋。Optimization design is made on the rooftop air heating system from the aspect of air supply, collector area and air velocity. A typical farmhouse with rooftop air heating system was also tested, and re-sults show that using high efficient air collector, applying air supply of up-supply and down-return, and with the 4~6m/s of air velocity in the collector, the systematic thermal efficiency is about 20%, and the so-lar contribution rate is about 44%if the room temperature is designed 14＆#176;C. The system has the advantages of simple structure, low price, easy installation, easy maintenance, and can effectively use the roof area, and is suitable for new farmhouses.

关 键 词：太阳能利用 屋顶空气集热系统 热效率 太阳能贡献率 

分 类 号：TU831[建筑科学—供热、供燃气、通风及空调工程]