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Correlations for the maximum transient non-periodic indoor heat flow through 15 typical walls

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  • Antonopoulos, K.A.
  • Democritou, F.

Abstract

The usual practice of assuming periodic outdoor conditions for calculation of the transient wall heat flow in air-conditioning load calculations leads to considerable errors in the case of a significant temporary deviation of the outdoor air temperature from periodicity. In the present work, which is based on a finite-difference solution of the transient non-periodic wall heat-conduction problem, we develop a very simple correlation for calculation of the increase of the maximum indoor heat flow Δq caused by a temporary rise of the outdoor air temperature in 15 typical wall constructions. For each one of these, the correlation expresses Δq in terms of temperature-deviation duration, of mean temperature difference and of amplitude difference of the temperature oscillations during and before the deviation from periodicity.

Suggested Citation

  • Antonopoulos, K.A. & Democritou, F., 1993. "Correlations for the maximum transient non-periodic indoor heat flow through 15 typical walls," Energy, Elsevier, vol. 18(7), pages 705-715.
    • Handle: RePEc:eee:energy:v:18:y:1993:i:7:p:705-715
    DOI: 10.1016/0360-5442(93)90030-H
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    References listed on IDEAS

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    1. Antonopoulos, K.A. & Valsamakis, S.P., 1993. "Effects of indoor and outdoor heat-transfer coefficients and solar absorptance on heat flow through walls," Energy, Elsevier, vol. 18(3), pages 259-271.
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    1. Antonopoulos, K.A. & Democritou, F., 1994. "Two wall-coefficients and two climatic parameters for estimating the maximum periodic wall heat gain," Renewable Energy, Elsevier, vol. 4(5), pages 471-479.
    2. Antonopoulos, K. A. & Democritou, F., 1995. "Transient conduction under cosine temperature perturbations," Applied Energy, Elsevier, vol. 50(3), pages 233-246.
    3. Antonopoulos, K.A. & Vrachopoulos, M., 1995. "On the inverse transient heat-transfer problem in structural elements exposed to solar radiation," Renewable Energy, Elsevier, vol. 6(4), pages 381-397.

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    1. Antonopoulos, K.A. & Tzivanidis, C., 1995. "A correlation for the thermal delay of buildings," Renewable Energy, Elsevier, vol. 6(7), pages 687-699.
    2. Antonopoulos, K.A. & Democritou, F., 1994. "Two wall-coefficients and two climatic parameters for estimating the maximum periodic wall heat gain," Renewable Energy, Elsevier, vol. 4(5), pages 471-479.
    3. Antonopoulos, K. A. & Democritou, F., 1995. "Transient conduction under cosine temperature perturbations," Applied Energy, Elsevier, vol. 50(3), pages 233-246.
    4. Antonopoulos, K.A. & Vrachopoulos, M., 1995. "On the inverse transient heat-transfer problem in structural elements exposed to solar radiation," Renewable Energy, Elsevier, vol. 6(4), pages 381-397.

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