13 外気温によるコンクリート造建物の室温変動

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タイトル別名
  • 13) WEIGHTING FUNCTION OF ROOM TEMPERATURE FOR THE VARIATION OF OUTDOOR TEMPERATURE
  • 外気温によるコンクリート造建物の室温変動
  • ガイキオン ニ ヨル コンクリートゾウ タテモノ ノ シツオン ヘンドウ

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It is convenient to calculate the room temperature of building by means of du Hammel's formula using the weighting function. [numerical formula] Where, H: heating function φ_H: weighting function for heating F: outdoor temperature φ_F: weighting function for outdoor temperature I already described the method of calculation of weighting function for heating φ_H in the former report. In this paper I would like to describe how to calculate the weighting function for the variation of outdoor temperature. Assuming the room temperature is holded constant, and the outdoor temperature rises abruptly to 1℃, we can get theoretically the heat flow H_2 which streams in the building through walls, windows or by the air filtration etc., with infinite exponential series. However this series can be replaced approximately as follows. [numerical formula] where τ=t/k, 1/k=κ(r_w/R_i)^2 R: thermal resistance of the building a', α_1': constants which can be determined by thermal properties of outside concrete wall Q': quantity connected with heat capacity of walls, windows, doors etc. δ: Dirac's function Then the weighting function for the outdoor temperature φ_F is calculated from the equation [numerical formula] using φ_H(τ)=B_1e^<-β_1τ>+B_2e^<-β_2τ> The result is [numerical formula] In this paper I calculate the weighting function of an apartment house as an example, and using it I discuss thermal behaviors of this house, especially the temperature variation in the room when the outdoor temperature changes periodically.

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