辐射空调房间供暖期室内热环境及通风效率实验研究

摘要

Experimental studies of indoor thermal environment and ventilation effectiveness were performed in a room with low temperature radiant ceiling heating system combined with mixing ventilation system and displacement ventilation system. The results show that when ra-diant ceiling surface temperature ranges from 25 to 29 ℃, supply air temperature ranges from 15 to 19 ℃ and supply air flow rate equals 4. 2 h-1 , the distribution of indoor thermal environmental parameters are relatively uniform, the indoor vertical air temperature differences are less than 1 ℃ and ventilation effectiveness is approximately 1. 0 when low temperature radiant ceiling heating system is integrated with mixing ventilation system. The distribution of indoor thermal environmental parameters are relatively non-uniform, and the indoor vertical air temperature differences are large and up to 4℃ and ventilation effectiveness is approximately 1. 1 when low temperature radiant ceiling heating system is integrated with displacement ventilation system.%本文通过实验研究了供暖工况下辐射吊顶系统分别与混合通风系统和置换通风系统复合时办公房间室内热环境参数分布及新风系统的通风效率。结果表明：当辐射吊顶表面温度变化范围为25～29℃、送风温度变化范围为15～19℃及以换气次数表达的新风量等于4.2 h－1时，辐射吊顶供暖与混合通风房间室内垂直温差较小（不超过1℃）、空气紊流强度较大及新风系统的通风效率大约为1.0，而辐射吊顶供暖与置换通风房间室内垂直温差较大（最大能达到4℃），空气紊流强度较小及新风系统的通风效率为1.1左右。