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A platform for research: civil engineering, architecture and urbanism
Determination of optimum insulation thickness for building walls with moisture transfer in hot summer and cold winter zone of China
https://orcid.org/0000-0001-8849-1614
Highlights Coupled heat and moisture transfer model is proposed to predict energy consumption. P 1–P 2 economic model is used to analyze lifecycle total cost. Optimum insulation thickness is determined for typical cities in HSCW zone of China. Effect of moisture transfer on optimum insulation thickness is investigated.
Abstract The buildings are exposed to the hot-humid climate with high temperature and humidity in hot summer and cold winter zone of China. Moisture transfer and accumulation within exterior walls have notable effect on the cooling and heating transmission load. Finally, it will influence the thickness of insulation. In this paper, a coupled heat and moisture transfer model which considers the effect of the moisture transfer on heat transfer is presented to calculate the cooling and heating transmission load. Then, the optimum insulation thickness of exterior walls is determined by using the P 1–P 2 economic model. Three representative cities, Changsha, Chengdu and Shaoguan, are chosen as the sample cites. The results show that the optimum thickness of extruded polystyrene (XPS) is between 0.053 and 0.069m and the optimum thickness of expanded polystyrene (EPS) is between 0.081 and 0.105m. The maximum lifecycle saving varies from 16.60 to 28.50$/m2 and the payback period varies from 1.89 to 2.56 years. EPS is more economical than XPS as insulation because of its lower lifecycle total cost. The comparisons are made between the results based on the coupled heat and moisture transfer model and the transient heat transfer model without considering the influence of moisture transfer.
Determination of optimum insulation thickness for building walls with moisture transfer in hot summer and cold winter zone of China
https://orcid.org/0000-0001-8849-1614
Highlights Coupled heat and moisture transfer model is proposed to predict energy consumption. P 1–P 2 economic model is used to analyze lifecycle total cost. Optimum insulation thickness is determined for typical cities in HSCW zone of China. Effect of moisture transfer on optimum insulation thickness is investigated.
Abstract The buildings are exposed to the hot-humid climate with high temperature and humidity in hot summer and cold winter zone of China. Moisture transfer and accumulation within exterior walls have notable effect on the cooling and heating transmission load. Finally, it will influence the thickness of insulation. In this paper, a coupled heat and moisture transfer model which considers the effect of the moisture transfer on heat transfer is presented to calculate the cooling and heating transmission load. Then, the optimum insulation thickness of exterior walls is determined by using the P 1–P 2 economic model. Three representative cities, Changsha, Chengdu and Shaoguan, are chosen as the sample cites. The results show that the optimum thickness of extruded polystyrene (XPS) is between 0.053 and 0.069m and the optimum thickness of expanded polystyrene (EPS) is between 0.081 and 0.105m. The maximum lifecycle saving varies from 16.60 to 28.50$/m2 and the payback period varies from 1.89 to 2.56 years. EPS is more economical than XPS as insulation because of its lower lifecycle total cost. The comparisons are made between the results based on the coupled heat and moisture transfer model and the transient heat transfer model without considering the influence of moisture transfer.
Determination of optimum insulation thickness for building walls with moisture transfer in hot summer and cold winter zone of China
https://orcid.org/0000-0001-8849-1614
Highlights Coupled heat and moisture transfer model is proposed to predict energy consumption. P 1–P 2 economic model is used to analyze lifecycle total cost. Optimum insulation thickness is determined for typical cities in HSCW zone of China. Effect of moisture transfer on optimum insulation thickness is investigated.
Abstract The buildings are exposed to the hot-humid climate with high temperature and humidity in hot summer and cold winter zone of China. Moisture transfer and accumulation within exterior walls have notable effect on the cooling and heating transmission load. Finally, it will influence the thickness of insulation. In this paper, a coupled heat and moisture transfer model which considers the effect of the moisture transfer on heat transfer is presented to calculate the cooling and heating transmission load. Then, the optimum insulation thickness of exterior walls is determined by using the P 1–P 2 economic model. Three representative cities, Changsha, Chengdu and Shaoguan, are chosen as the sample cites. The results show that the optimum thickness of extruded polystyrene (XPS) is between 0.053 and 0.069m and the optimum thickness of expanded polystyrene (EPS) is between 0.081 and 0.105m. The maximum lifecycle saving varies from 16.60 to 28.50$/m2 and the payback period varies from 1.89 to 2.56 years. EPS is more economical than XPS as insulation because of its lower lifecycle total cost. The comparisons are made between the results based on the coupled heat and moisture transfer model and the transient heat transfer model without considering the influence of moisture transfer.
Determination of optimum insulation thickness for building walls with moisture transfer in hot summer and cold winter zone of China
Liu, Xiangwei (author) / Chen, Youming (author) / Ge, Hua (author) / Fazio, Paul (author) / Chen, Guojie (author) / Guo, Xingguo (author)
Energy and Buildings ; 109 ; 361-368
2015-10-10
8 pages
Article (Journal)
Electronic Resource
English