干式地板辐射非全覆盖导热板式末端供暖系统实验研究

Experimental study of lightweight radiant floor heating system with non-full-coverage heat-conducting plate

为探究干式地板辐射非全覆盖导热板式末端系统的热工特性、室内热环境及能耗,采用现场实验与理论计算相结合的方法,对不同工况下的干式与传统湿式地板辐射末端系统进行了对比研究.结果表明:干式系统室内人员主要活动区域空气温度由5℃升至15℃的时长较湿式系统快约2 h,相较于湿式系统室内预测不满意率降至20%所需时间约5 h,干式系统仅需要约2.2 h;同时,干式系统较湿式系统供暖节能约15%~17%,这可能与末端有效传热量占比有关;此外,该干式系统间歇运行室内气温调控更稳定,但室内人员主要活动区域空气最大温升较湿式系统低3.3~3.6℃,且存在地面温差大的情况.该研究可为干式地板辐射供冷暖末端系统设计与应用提供借鉴.

To study the heat transfer characteristics,indoor thermal environment construction and energy consumption of the lightweight radiant floor heating(LRFH)system with non-full-coverage heat-conducting plate,the LRFH system and the traditional radiant floor heating system(TRFH)under different operating conditions are compared and studied by using the field experiment and theoretical calculation method.The results show that the air temperature in the main activity area of the LRFH system rises from 5℃to 15℃for about 2 h faster than that in the TRFH system,and compared with the TRFH system,it takes about 5 h for the unsatisfactory percentage of indoor prediction to decrease to 20%,but only about 2.2 h for the LRFH system.Meanwhile,the LRFH system saves about 15%to 17%energy compared with the TRFH system,which may be related to the proportion of effective heat transfer at the end.In addition,the LRFH system intermittent operation of indoor air temperature control is more stable,but the maximum temperature rise of the air in the main activity area of indoor personnel is 3.3 to 3.6℃lower than that of the TRFH system,and there is a large temperature difference on the ground.The study can provide a reference for the design and application of the lightweight radiant floor heating and cooling systems.