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Two wall-coefficients and two climatic parameters for estimating the maximum periodic wall heat gain

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

Abstract

Based on a finite-difference solution of the transient, periodic wall heat conduction differential equation and on the superposition principle, a correlation is developed, which expresses the maximum periodic indoor heat flow in terms of two wall-dependent coefficients m and r, and two corresponding climatic parameters ΔTmax and ΔTr. Tables with the values of the wall coefficients and the climatic parameters are available for 15 typical wall constructions and various cities around the world. Based on the present method, it is easy to develop more extensive tables. The above correlation is directly applicable when the maximum outdoor air temperature and the daily range for the location considered are known. When the temperature information is available in the form of the mean temperature and the amplitudes of a cosine and a sine variation, another correlation is suggested. The correlations developed are useful in building heat transfer applications and especially in the design of air-conditioning installations, for estimating peak loads and sizing the related equipment.

Suggested Citation

  • 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.
    • Handle: RePEc:eee:renene:v:4:y:1994:i:5:p:471-479
    DOI: 10.1016/0960-1481(94)90209-7
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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.
    2. 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.
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    1. Antonopoulos, K. A. & Democritou, F., 1995. "Transient conduction under cosine temperature perturbations," Applied Energy, Elsevier, vol. 50(3), pages 233-246.
    2. 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.
    3. 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.
    4. Antonopoulos, K.A. & Tzivanidis, C., 1995. "A correlation for the thermal delay of buildings," Renewable Energy, Elsevier, vol. 6(7), pages 687-699.

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