变水温工况下室内空调末端供热能力探讨  

Discussion on heating capacity of indoor air conditioning terminals under variable water temperature conditions

作　　者：王伟良 徐稳龙 张昕 郑坤 赵刚 Wang Weiliang;Xu Wenlong;Zhang Xin;Zheng Kun;Zhao Gang(China Architecture Design&Research Group,Beijing,China;不详)

机构地区：[1]中国建筑设计研究院有限公司

出　　处：《暖通空调》2021年第6期35-39,共5页Heating Ventilating & Air Conditioning

摘　　要：室内空调末端根据夏季冷负荷进行选型,在房间热冷负荷比较小的地区常出现冬季供热能力富余。以风机盘管为例,针对盘管内定流量和变流量2种工况,从传热学基本原理出发,对传热系数的影响因素进行了分析,得出了冬季不同供水温度所能匹配的最大冬季室内热负荷,为相应空调系统设计及冷热源选型提供理论依据。定流量工况供水温度在30~45℃之间变化时,所能适用的房间最大热冷负荷比变化区间为32%~89%,变流量工况下(供回水温差为5℃)相应的变化区间为15%~88%。The indoor air conditioning terminal is selected according to the summer cooling load.In winter the heating capacity is often surplus in the area with small indoor heating load.Taking the fan-coil unit as an example,based on the principle of heat transfer,analyses the influencing factors of heat transfer coefficient under the constant flow condition and the variable flow condition.Obtains the maximum indoor heating load that can be matched by different water supply temperatures in winter,providing a theoretical basis for the design of corresponding air conditioning system and the selection of cold and heat sources.When the water supply temperature under constant flow conditions changes from 30℃to 45℃,the applicable range of maximum heating-cooling load ratio of the room is 32%to 89%,and the corresponding change interval under variable flow conditions(the temperature difference between supply and return water is 5℃)is 15%to 88%.

关 键 词：变流量 定流量 供热温度 盘管出力 热冷负荷比 空调末端 

分 类 号：TU831[建筑科学—供热、供燃气、通风及空调工程]