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CALCULATION METHODS OF RADIATIVE HEAT TRANSFER COEFFICIENT FOR DIVIDED AIRSPACES
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- AKASAKA Hiroshi
- Dept. of Architecture, Faculty of Engineering, Kagoshima University
Bibliographic Information
- Other Title
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- 仕切りのある中空層の放射熱伝達率の計算法
- シキリ ノ アル チュウクウソウ ノ ホウシャ ネツ デンタツリツ ノ ケイサンホウ
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Description
The airspaces existing in exterior walls and window frames influence the overall heat transfer of these building components. The heat transfer in the airspaces consists of convective heat transfer and radiative heat transfer. The radiative heat transfer coefficient of the airspaces varies largely with their surface emissivities, surface temperatures, and two- or three-dimensional (3-D) shapes. Therefore, it is important to calculate the radiative heat transfer coefficient of the airspaces as accurate as possible considering the effects of these factors. In this paper, the calculation equations of the 2-D radiative heat transfer coefficient adopted in ISO 6946, ISO 10077-2, ISO/FDIS 15099, and JIS A 2101 are derived and the necessary assumptions for the derivations are summarized. Then it is shown that the 3-D equation is easily derived from the 2-D equation adopted in ISO/FDIS 15099. Numerical calculation method of 3-D equation considering the effect of the surface temperature distribution is developed. The recommended ranges for the use of the equations are summarized on the basis of the comparison with the accurate numerical method.
Journal
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- Journal of Architecture and Planning (Transactions of AIJ)
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Journal of Architecture and Planning (Transactions of AIJ) 67 (561), 13-20, 2002
Architectural Institute of Japan
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Keywords
Details 詳細情報について
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- CRID
- 1390282679759633024
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- NII Article ID
- 110004658150
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- NII Book ID
- AN10438548
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- ISSN
- 18818161
- 13404210
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- NDL BIB ID
- 6365069
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- Text Lang
- ja
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- Article Type
- journal article
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- Data Source
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- JaLC
- NDL Search
- Crossref
- CiNii Articles
- KAKEN
- OpenAIRE
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- Abstract License Flag
- Disallowed