The effects of insulation location and thermo-physical properties of various external wall materials on decrement factor and time lag

Scientific Research and Essays

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关键词: External wall;    time lag;    decrement factor;    P1-P2 ;    method;    optimum insulation thickness.;   

DOI  :  

学科分类：社会科学、人文和艺术（综合）

来源: Academic Journals

【 摘 要 】

Technological improvements and population growth make energy saving more important especially for developing countries. As known, a considerable amount of consumed energy is used for space heating in buildings; therefore, using insulation for external wall has gained more importance. In this sense, this study, which consists of two parts, examines the efficiency of insulation location and thermo-physical properties of various external wall materials (brick, reinforced and lightweight concrete). In the first part, the optimum insulation thickness of external walls for various wall materials and different fuel types in cold region (Eskişehir) has been investigated. The optimization is based on the P1-P2method. Besides, the effect of the thermal properties of different wall constructions and the location of insulation on time lag and decrement factor are studied;and then,the daily thermal behaviours of various wall constructions are simulated. In consequence of the study, time lagswere determined between4.34 and 6.74 on the outer insulated walls and3.64 and 5.86 on the inner insulated walls. The decrement factor was computed between 0.008 - 0.023 and 0.019 - 0.029 respectively.

【 授权许可】

CC BY