低温辐射地板供暖与供新风室内热环境及通风效率实验研究

摘要

Experimentally studies indoor thermal environment parameter distribution and ventilation effectiveness in a room with low temperature radiant floor heating system combined with mixing ventilation system or displacement ventilation system.The results show that when radiant floor surface temperature ranges from 25 ℃ to 29 ℃,supply air temperature ranges from 15 ℃ to 19 ℃ and outdoor air change rate is 4.2 h-1 ,the distribution of indoor thermal environmental parameter is relatively uniform,the indoor vertical air temperature difference is less than 1 ℃ and ventilation effectiveness is approximately 1.0 when the low temperature radiant floor heating system is integrated with mixing ventilation system.The distribution of indoor thermal environmental parameter is relatively non-uniform,the indoor vertical air temperature difference is large and up to 4 ℃ and ventilation effectiveness is approximately 1.1 when low temperature radiant floor heating system is integrated with displacement ventilation system.%实验研究了低温辐射地板供暖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：当辐射地板表面温度为25～29℃、送风温度为15～19℃及新风换气次数为4．2 h－1时，低温辐射地板供暖与混合通风复合室内热环境参数分布相对比较均匀，室内空气垂直温差较小，不超过1℃，新风系统的通风效率大约为1．0；与置换通风复合室内热环境参数分布相对比较不均匀，室内空气垂直温差较大，最大能达到4℃，新风系统的通风效率为1．1左右。