地板辐射供暖房间热负荷计算研究  

Study on Heat Load Calculation of Radiant Floor Heating Room

作　　者：王梅杰[1] 赵青玲[1] 陈园园 WANG Meijie;ZHAO Qingling;CHEN Yuanyuan(North China University of Water Resources and Electric Power,Zhengzhou 450008,Henan,China)

机构地区：[1]华北水利水电大学,河南郑州450008

出　　处：《建筑科学》2020年第4期169-177,共9页Building Science

基　　金：河南省高等学校重点科研项目“秸秆内热式热解生产工艺研究”(18A480001)。

摘　　要：基于热平衡原理建立了地板辐射供暖房间简化传热数学模型,通过与文献实验结果对比,验证了该模型的准确性。研究了不同室内设计温度下房间热负荷和外围护内表面复合表面传热系数(简称复合表面传热系数)随房间换气次数、外围护保温性能、以及室外温度的变化规律;比较了热负荷的理论计算、规范计算和ASHRAE计算结果的差异性;探讨了复合表面传热系数在不同气候区的取值。结果表明:复合表面传热系数随房间换气次数、室内空气温度、以及外围护保温性能的提高而增大,随室外温度的变化而几乎不变;在现行规范设计条件下,地板辐射供暖房间的复合表面传热系数比传统值高10%以上;地板辐射供暖房间的室内设计温度每提高1℃,房间热负荷将增加4%左右;ASHRAE计算地板供热量始终大于规范和理论计算值;在0.5次/时的换气次数下,ASHRAE计算地板供热量比理论计算值高4.5%~5.0%,比规范计算值高5.1%~5.9%。Based on the principle of thermal balance,the simplified heat transfer mathematical model of radiant floor heating room is established,and its accuracy is verified by comparing with the experimental results in references.The dependence of the room heat load and envelop internal surface total heat transfer coefficient( EISTHTC) changing with ventilation rate,envelop thermal performance and outdoor temperature is studied at different indoor temperature.The differences among heat load calculated by theory,by standards and by ASHRAE are compared.The Value of EISTHTC in different climatic zones is discussed.The results show that EISTHTC increases with the rising of ventilation rate,indoor temperature and envelop thermal performance,but remains almost unchanged with different outdoor temperature.By current standard design condition,the EISTHTC’s value of radiant floor heating room calculated by theory is over 10% higher than the traditional given value.A 1 ℃ rise in indoor temperature makes the heat load of radiant floor heating room increasing around 4%.The floor heat load calculated by ASHRAE is always higher than calculated by standards and by theory.Floor heat load calculated by ASHRAE is 4.5% ~ 5.0% higher than calculated by theory and 5.1% ~ 5.9% higher than calculated by standards at the ventilation rate of 0.5 times per hour.

关 键 词：热平衡 辐射供暖 房间热负荷 计算模型 外围护内表面复合表面传热系数 

分 类 号：TU831[建筑科学—供热、供燃气、通风及空调工程]