摘要
为了探究适宜我国夏热冬冷地区自保温建筑的间歇供暖方式,搭建实验台测试辐射地板、风机盘管和散热器3种典型供暖方式间歇运行模式下的室内热环境和传热量;采用垂直温差、温度波动系数和时间常数比较不同供暖方式的室内热环境特征.在室外平均温度为5°C、空气源热泵提供50°C热水的情况下,在利用辐射地板和风机盘管供暖时,室内操作温度均可以达到20.0°C的设定值,满足热舒适需求;辐射地板房间由于向下热损失以及围护结构传热相对较多,耗热量较风机盘管房间高12%.在利用辐射地板供暖时,室温的均匀性和稳定性优于风机盘管供暖;在自保温建筑中以操作温度衡量的启动时间常数为2.8 h.结合热环境和耗热量情况给出辐射地板间歇供暖提前开启和关闭的运行建议.
In order to distinguish the proper heating methods for self-thermal insulation buildings in hot summer and cold winter zone of China,an experimental platform was built to test the indoor thermal environment and heat transfer of three typical heating modes,i.e.,radiant floor,fan coil units and radiators,based on the intermittent space heating mode of buildings in this area.The indoor thermal environment characteristics of different heating modes were compared via the use of vertical temperature difference,temperature fluctuation coefficient and time constant.The indoor operating temperature reached the set value of 20.0°C when radiant floor and fan coil units were used,meeting the requirement of thermal comfort,in the case of outdoor average temperature of 5°C and hot water of 50°C produced by an air source heat pump.Under the same operating temperature,the room with radiant floor heating consumed about 12%more heat than the fan-coil room due to the considerable downward heat loss and envelope heat transfer.Radiant floor heating was superior to fan coil heating in terms of uniformity and stability of indoor temperature,and the time constant of the startup phase measured in operation temperature in a self-thermal insulation room was 2.8 h.Operative suggestions are given for an early start and termination during intermittent space heating for the radiant floor heating system,given the thermal environment and heat consumption.
作者
陆江
王登辉
赵康
刘诗韵
LU Jiang;WANG Deng-hui;ZHAO Kang;LIU Shi-yun(College of Civil Engineering and Architecture,Zhejiang University of Science and Technology,Hangzhou 310023,China;Center for Balance Architecture,Zhejiang University,Hangzhou 310007,China;College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China)
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2020年第11期2092-2099,2108,共9页
Journal of Zhejiang University：Engineering Science
基金
国家重点研发计划资助项目(2016YFC0700302)
国家自然科学基金资助项目(51708489).
关键词
自保温建筑
间歇供暖
辐射地板
风机盘管
夏热冬冷地区
self-thermal insulation building
intermittent heating
radiant floor
fan coil unit
hot summer and cold winter zone
