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.
出处
《建筑节能》
CAS
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)
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
solar utilization
rooftop air collector
thermal efficiency
solar contribution rate
作者简介
章永洁（1975-），女，工学博士，就职于北京市可持续发展促进会，研究方向：建筑、工业节能减排及新能源（zyj_jie@163．com）。
