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Numerical analysis of temperature non-uniformity and cooling capacity for capillary ceiling radiant cooling panel

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成果类型:
期刊论文
作者:
Xie, Dong;Wang, Yun;Wang, Hanqing;Mo, Shunquan;Liao, Maili
通讯作者:
Xie, D.
作者机构:
School of Urban Construction, University of South China, Hengyang, 421001, China
School of Energy Science and Engineering, Central South University, Changsha, 410083, China
Hunan University of Commerce, Changsha, 410205, China
[Xie, Dong; Liao, Maili; Mo, Shunquan; Wang, Yun] School of Urban Construction, University of South China, Hengyang, China
[Xie, Dong; Wang, Hanqing] School of Energy Science and Engineering, Central South University, Changsha, China
通讯机构:
[Xie, Dong] Univ South China, Sch Urban Construct, Hengyang 421001, Peoples R China.
School of Urban Construction, University of South China, Hengyang, China
语种:
英文
关键词:
CFD;Capillary ceiling radiant cooling panel;Cooling capacity;Distribution of temperature non-uniformity;Numerical analysis
期刊:
Renewable Energy
ISSN:
0960-1481
年:
2016
卷:
87
页码:
1154-1161
基金类别:
National Science & Technology Pillar Program during the 12th Five-year Plan Period [2011BAJ03B07]; Hunan Provincial Natural Science Foundation of China [14JJ3100]; Postdoctoral Science Foundation of China [2013M542140]; Postdoctoral Science Foundation of Central South University [126640]
机构署名:
本校为第一且通讯机构
院系归属:
土木工程学院
摘要:
Capillary ceiling radiant cooling panel is a high temperature cooling system, which could pose low energy consumption to meet thermal comfort requirements. A computational fluid dynamics (CFD) simulation study on heat transfer of chilled water flow in the capillary of ceiling radiant cooling panel was performed to attain surface temperature distributions and cooling capacities. Six influencing factors included chilled water inlet parameters, conditions of gypsum plaster and capillary mats structural parameters were considered to obtain the complicated relationships between capillary radiant panel conditions and heat transfer performance. The index of temperature non-uniformity coefficient was proposed to evaluate temperature profiles of ceiling panel surface. The results of the simulation were compared with the values depicted in ASHRAE Handbook and good agreement had been achieved. The average difference between simulation results and the values reported by ASHRAE handbook was within the region of 15%. The research results showed that temperature non-uniformity coefficient was negatively correlated with temperature of chilled inlet water (linear correlation), water velocity (correlation coefficient R = -0.85), and pipe diameter (correlation coefficient R = -0.93), but positively and linearly correlated with tube spacing. Cooling capacity was found to have negative linear correlation with temperature of chilled inlet water, covering thickness and tube spacing. (C) 2015 Elsevier Ltd. All rights reserved.

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