Evaluation of the thermal performance of radiant floor heating system with the influence of unevenly distributed solar radiation based on the theory of discretization
作者机构：School of Mechanical EngineeringSouthwest Jiaotong UniversityChengdu 610031China
出 版 物：《Building Simulation》 (建筑模拟（英文）)
年 卷 期：2023年第16卷第1期
页 面：105-120页
核心收录：
学科分类：0820[工学-石油与天然气工程] 08[工学] 0807[工学-动力工程及工程热物理] 081304[工学-建筑技术科学] 0813[工学-建筑学]
基 金：This research work was financially supported by the Natural Science Foundation of Sichuan Province(No.2022NSFSC1944) the National Natural Science Foundation of China(No.51708453)
主 题：radiant floor heating solar radiation simplified model thermal performance
摘 要：In the building with many transparent envelopes,solar radiation can irradiate on the local surface of floor and cause *** local thermal comfort in the room will be dissatisfactory and the thermal performance of radiant floor will be strongly ***,in many current calculation models,solar radiation on the floor surface is assumed to be uniformly distributed,resulting in the inaccurate evaluation of the thermal performance of the radiant *** this paper,a calculation model based on the theory of discretization and the RC thermal network is proposed to calculate the dynamic thermal performance of radiant floor with the consideration of unevenly distributed solar ***,the discretization model is experimentally validated and is used to simulate a radiant floor heating system of an office room in *** is found that with the unevenly distributed solar radiation,the maximum surface temperature near the south exterior window can reach up to 35.6℃,which exceeds the comfort temperature limit and is nearly 8.5℃higher than that in the north ***,the heating capacity of the radiant floor in the irradiated zone can reach up to 171 W/m^(2),while that in the shaded zone is only 79 W/m^(2).The model with the assumption of uniformly distributed solar radiation ignores the differences between the south and north zones and fails to describe local overheating in the irradiated *** contrast,the discretization model can more accurately evaluate the thermal performance of radiant floor with the influence of real solar *** on this discretization model,novel design and control schemes of radiant floor heating system can be proposed to alleviate local overheating and reduce heating capacity in the irradiated zone.
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