Non-uniform operative temperature distribution characteristics and heat-source-controlled core-area range of local heating radiators  

作　　者：Dengjia Wang Weijia Li Yanfeng Liu Yaowen Chen Liang Hu Hu Du 

机构地区：[1]State Key Laboratory of Green Building in Western China,Xi'an University of Architecture and Technology,Xi'an 710055,China [2]School of Building Services Science and Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China [3]Welsh School of Architecture,Cardiff University,Cardiff,CF103NB,UK

出　　处：《Building Simulation》2023年第1期87-103,共17页建筑模拟（英文）

基　　金：The research was supported by the National Natural Science Foundation of China(No.52078408);the Science Foundation for Outstanding Youth of Shaanxi Province(2020JC-43).

摘　　要：Heating the whole space,which is currently used in northern China,leads to high energy consumption and substantial pollution.A transition to local heating has the potential to help address this problem.In this paper,the effects of radiator-related parameters(position,power,and size)and room-related parameters(aspect ratio and height)on local heating were studied.Two evaluation indices,the effective coefficient of operative temperature(OTEC)and the effective coefficient of local heating(LHEC),were proposed.In addition,the heat source-control core-area(HSCCA)was proposed,and the effect range of heat sources in the space was evaluated by the attenuation of operative temperature.The findings demonstrated that the radiator position has a greater influence on local heating than size.When the position of the radiator was changed from"close to the inner wall"to"close to the outer wall",the LHEC(the interior one-quarter of room is a local heating zone)was found to decrease by 73%.The size of the radiator,which is close to the inner wall,doubled or quadrupled,and the LHEC increased by 9%and 18%.Moreover,rooms with a larger aspect ratio or small room height were found to be the most optimal for local heating applications.The area of the HSCCA decreased as the position of the radiator approached the outer wall.The findings of this study can be used as a design reference for the radiator when the heating mode changes from"full-space heating"to"local heating".

关 键 词：local heating RADIATOR non-uniform thermal environment operative temperature mean radiant temperature temperature distribution 

分 类 号：TU111[建筑科学—建筑理论]