JP6902079B2 - 屋根構造の設計方法 - Google Patents
屋根構造の設計方法 Download PDFInfo
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- JP6902079B2 JP6902079B2 JP2019189660A JP2019189660A JP6902079B2 JP 6902079 B2 JP6902079 B2 JP 6902079B2 JP 2019189660 A JP2019189660 A JP 2019189660A JP 2019189660 A JP2019189660 A JP 2019189660A JP 6902079 B2 JP6902079 B2 JP 6902079B2
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- heat insulating
- insulating material
- low emissivity
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- emissivity
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Description
qr=αr×φ12×(ts−ti) ・・・(1)
qr:放射熱量(W/m2)
αr:断熱材4の放射熱伝達率(W/m2K)
φ12:形態係数(屋内空間9から屋根材2の裏面20を見たときの形態係数)
ts:断熱材4の屋内面40の温度(K)
ti:屋内空間9にある物体表面の温度(K)
αr=ε1×ε2×Cb×β ・・・(2)
ε1:断熱材4の屋内面40の放射率
ε2:屋内空間9にある物体表面の放射率
Cb:ステファン・ボルツマン常数:5.67×10−4(W/m2K4)
β:温度係数
ts=Ri/(R+Ri)×(to−ti)+ti ・・・(3)
Ri:断熱材4の総合熱伝達抵抗:1/(αc+αr)(W/m2K)
αc:断熱材4の対流熱伝達率(W/m2K)
R:屋根材2と断熱材4の熱抵抗値の合計
to:屋根材2の表面21の温度(K)
Claims (1)
- 日射熱による屋内空間への放射熱を抑制するための建物の屋根構造の設計方法であって、
前記屋根構造は、表面が屋外に面する板状の屋根材と、前記屋根材の裏面側に配置され、熱放射性を有する熱放射性材料で形成された低放射率部材と、前記屋根材の裏面に貼り付けられ、前記屋根材と前記低放射率部材とに挟まれた断熱材とを備え、
前記屋根構造に使用する前記断熱材の厚さをX軸またはY軸とし、前記屋根構造から前記屋内空間に放射される放射熱量をY軸またはX軸とする座標図を用意する工程と、
前記屋根構造に使用する可能性があり、異なった放射率を有する複数種の低放射率部材を用意し、各低放射率部材を適用した場合に得られる放射熱量と前記断熱材の厚さとの関係を表す曲線を前記座標図上に描く工程と、
前記異なった放射率を有する複数種の低放射率部材における放射熱量と、前記断熱材の厚さとの関係を描いた前記座標図上で、目標とする放射熱量を選択する工程と、
前記座標図上で選択した放射熱量となるように、使用する低放射率部材と前記断熱材の厚さとを決定する工程とを備える、屋根構造の設計方法。
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JP2019189660A JP6902079B2 (ja) | 2015-03-31 | 2019-10-16 | 屋根構造の設計方法 |
JP2021101481A JP7104220B2 (ja) | 2019-10-16 | 2021-06-18 | 屋根構造 |
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JP2015071453A JP6804826B2 (ja) | 2015-03-31 | 2015-03-31 | 屋根構造 |
JP2019189660A JP6902079B2 (ja) | 2015-03-31 | 2019-10-16 | 屋根構造の設計方法 |
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JP2021101481A Division JP7104220B2 (ja) | 2019-10-16 | 2021-06-18 | 屋根構造 |
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JP2020073760A JP2020073760A (ja) | 2020-05-14 |
JP6902079B2 true JP6902079B2 (ja) | 2021-07-14 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2021143594A (ja) * | 2019-10-16 | 2021-09-24 | 大和ハウス工業株式会社 | 屋根構造 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS605822U (ja) * | 1983-06-25 | 1985-01-16 | ニチアス株式会社 | 金属折版屋根板用断熱フエルト |
JP3398545B2 (ja) * | 1996-06-19 | 2003-04-21 | 雄二 武田 | 断熱効果に優れたガラス窓 |
JP4139592B2 (ja) * | 2001-12-27 | 2008-08-27 | 旭ファイバーグラス株式会社 | 断熱工法選択支援システム |
JP3552712B2 (ja) * | 2002-07-15 | 2004-08-11 | 株式会社サニックス | 屋根裏断熱構造 |
JP5479690B2 (ja) * | 2008-04-30 | 2014-04-23 | 古河電気工業株式会社 | 耐火性金属折板屋根積層構造体 |
JP5322070B1 (ja) * | 2012-07-30 | 2013-10-23 | 日本遮熱株式会社 | 遮熱板材 |
US9340994B2 (en) * | 2012-08-28 | 2016-05-17 | Alaska Structures, Inc. | Portable shelter with outer vinyl and low emissivity layers |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2021143594A (ja) * | 2019-10-16 | 2021-09-24 | 大和ハウス工業株式会社 | 屋根構造 |
JP7104220B2 (ja) | 2019-10-16 | 2022-07-20 | 大和ハウス工業株式会社 | 屋根構造 |
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