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On the inverse transient heat-transfer problem in structural elements exposed to solar radiation

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  • Antonopoulos, K.A.
  • Vrachopoulos, M.

Abstract

The inverse transient heat-transfer problem in walls, whether or not exposed to solar radiation, i.e. the estimation of the thermal properties of a wall if the transient temperature and/or heat flow fields are known, is interesting both from the theoretical and practical point of view. An attempt is made to analyse and solve this problem. Methods are developed for estimating the thermal properties of structural elements which are already parts of existing buildings, i.e. under real transient, non-periodic conditions. The finite-difference and experimental examples presented show that the thermal diffusivity, the thermal conductivity and the overall heat transfer coefficient may be estimated with very good accuracy by taking on-site temperature and heat flow measurements.

Suggested Citation

  • 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.
    • Handle: RePEc:eee:renene:v:6:y:1995:i:4:p:381-397
    DOI: 10.1016/0960-1481(94)00086-L
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    References listed on IDEAS

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    1. Antonopoulos, K.A. & Democritou, F. & Vrachopoulos, M., 1994. "An experimental system for the transient, non-periodic thermal analysis of structural elements," Energy, Elsevier, vol. 19(4), pages 383-395.
    2. 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.
    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.
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    Cited by:

    1. Sammouda, H. & Royere, C. & Belghith, A. & Maalej, M., 1999. "Heat transfer in a rotating furnace of asolarsand-boiler at a 1000 kW thermal concentrationsystem," Renewable Energy, Elsevier, vol. 17(1), pages 21-47.
    2. Vrachopoulos, M.Gr. & Filios, A.E. & Fatsis, A. & Mavrommatis, S., 2008. "Determination of the thermal and cooling needs of the broader region of Athens," Renewable Energy, Elsevier, vol. 33(12), pages 2615-2622.
    3. Mariusz Owczarek, 2021. "Thermal Fluxes and Solar Energy Storage in a Massive Brick Wall in Natural Conditions," Energies, MDPI, vol. 14(23), pages 1-17, December.
    4. Sammouda, H. & Royere, C. & Belghith, A. & Maalej, M., 1999. "Reflected radiance distribution law for a 1000 kW thermal solar furnace system," Renewable Energy, Elsevier, vol. 17(1), pages 9-20.

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