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  • Author or Editor: T. Kalmár x
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Abstract

The research work was done in the Building Physics Laboratory of the Department of Building Services and Building Engineering, University of Debrecen. The test room could be heated by radiator, wall, floor and ceiling heating. The main goal of this research was to see how the internal temperature varies during the heating up period, how much is the increment during the 3 hours measurement and how much the energy consumption is. This paper presents the results of the research work. The obtained results have proven that in our case the ceiling and radiator heating gave the higher increment of operative temperature and the lower energy consumption.

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This paper presents the results of analytical analysis of thermal comfort and radiation asymmetry in case of wall heating depending on the room geometry and thermal properties of the external wall. The negative effects of radiation asymmetry on thermal comfort in case of summer conditions can be lowered using advanced personalized ventilation systems. In case of buildings with poor thermal properties of the envelope during the winter period low surface temperatures may occur. The aim of this research was to analyse the thermal asymmetry in the case of a room with one external wall and wall heating installed on the opposite wall. It was assumed that the radiation asymmetry will lead to discomfort and it was hypothesised that the discomfort might be reduced increasing the air velocity. The results have proven that thermal asymmetry in the middle of the room will not lead to thermal discomfort even for walls without any additional thermal insulation. However, the mean radiant temperature varies significantly depending on the position of the occupant in the room. In this case, the personalized control on the air velocity can help to improve the thermal comfort conditions.

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