IMECH-IR  > 高温气体动力学国家重点实验室
Minimizing the thermal bridge through the columns in a refrigeration room
Jiang XQ1; Lin AQ2; Ma HL3; Li XY1; Li YY1
Source PublicationAPPLIED THERMAL ENGINEERING
2020-01-25
Volume165Pages:8
ISSN1359-4311
Abstract

Thermal bridges are weakly insulated areas in the envelope of a building that can significantly increase the energy load due to heat dissipation. To improve energy efficiency, a thermal bridge model is established to simulate heat transfer through the column in a refrigeration room. The accuracy of the numerical simulation program is verified by experimental data. A heat preservation method for the column that minimizes the cooling loss is analyzed. The results show that the thermal bridging is mainly due to the steel bar in the column, because the share of the cooling loss attributed to the steel bars is 42.02-55.87%. Moreover, applying heat insulation on the column can provide more energy savings in low-temperature rooms than in high-temperature ones. The most economical thermal insulation method as a function of the height and thickness of the insulation layer is therefore proposed for the low-temperature column. By the optimum method, the amount of heat flux through the whole column section, which includes both reinforced and non-reinforced areas, decreases by 37.34%, and the total cooling loss decreases from 30.23 to 13.66 W, representing a 54.81% reduction. Therefore, a reduction in the cooling loss from thermal bridging is achieved for a low-temperature refrigeration room.

KeywordRefrigeration room Thermal bridge Cooling loss Column Heat preservation
DOI10.1016/j.applthermaleng.2019.114565
Indexed BySCI ; EI
Language英语
WOS IDWOS:000503314300007
WOS KeywordENERGY-CONSUMPTION ; AIR CURTAINS ; COLD STORES ; FLOW ; OPTIMIZATION ; SENSITIVITY ; PERFORMANCE ; LOSSES ; DESIGN ; MODEL
WOS Research AreaThermodynamics ; Energy & Fuels ; Engineering ; Mechanics
WOS SubjectThermodynamics ; Energy & Fuels ; Engineering, Mechanical ; Mechanics
Funding ProjectLeading project of science and technology plan of Fujian Province[2019H0029]
Funding OrganizationLeading project of science and technology plan of Fujian Province
Classification一类
Ranking3
ContributorJiang, Xiaoqiang
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/81273
Collection高温气体动力学国家重点实验室
Affiliation1.Fujian Univ Technol, Sch Ecol Environm & Urban Construct, Fuzhou 350118, Fujian, Peoples R China;
2.Harbin Engn Univ, Coll Power & Energy Engn, Harbin 150001, Heilongjiang, Peoples R China;
3.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Jiang XQ,Lin AQ,Ma HL,et al. Minimizing the thermal bridge through the columns in a refrigeration room[J]. APPLIED THERMAL ENGINEERING,2020,165:8.
APA Jiang XQ,Lin AQ,Ma HL,Li XY,&Li YY.(2020).Minimizing the thermal bridge through the columns in a refrigeration room.APPLIED THERMAL ENGINEERING,165,8.
MLA Jiang XQ,et al."Minimizing the thermal bridge through the columns in a refrigeration room".APPLIED THERMAL ENGINEERING 165(2020):8.
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