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Thermal Comfort Aspects of Solar Gains during the Heating Season

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  • Ferenc Kalmár

    (Department of Building Services and Building Engineering, University of Debrecen, Debrecen 4028, Hungary)

  • Tünde Kalmár

    (Department of Building Services and Building Engineering, University of Debrecen, Debrecen 4028, Hungary)

Abstract

Glazing plays a key role in the energy balance of buildings. The aim of this paper is to enlighten the thermal discomfort caused by large glazed areas in the heating season and to point out a possible solution that can provide proper thermal comfort with low energy use. It is unusual to discuss the negative effects of solar gains on thermal comfort during the heating season. However, there are cases when glazing may lead to unforeseen indoor thermal discomfort conditions. Laboratory and on site measurements were performed in order to assess thermal discomfort caused by direct and diffuse radiation. It was shown that the WBGT (Wet Bulb Globe Temperature) index may exceed even 30 °C in the winter season in a room having large glazed area oriented to east. Laboratory tests performed in climate chamber have shown that the high PMV values cannot be reduced below 1.0, increasing the air change rate in the room. Using opaque drapes, the WBGT index was reduced by 2 °C, but the daylighting decreased substantially. It was demonstrated that by using advanced personalized ventilation systems, the appropriate thermal comfort can be provided avoiding the reduction of daylighting.

Suggested Citation

  • Ferenc Kalmár & Tünde Kalmár, 2020. "Thermal Comfort Aspects of Solar Gains during the Heating Season," Energies, MDPI, vol. 13(7), pages 1-15, April.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:7:p:1702-:d:341194
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    References listed on IDEAS

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