Răspunsul higrotermic al unei locuinţe individuale. Criterii de confort termic

Adrian Iacob, Marian Pruteanu, Andreea Hegyi, Gabriela Călătan

Rezumat/Abstract. The use of local natural materials in order to reduce the environmental negative impact of buildings has become common practice in recent years; such buildings are to be found in all regions of the planet. The high level of thermal protection provided by the envelope elements made from natural materials such as straw bale insulation, hemp insulation or sheep wool, and their lack of thermal massiveness require a more complex analysis on their ability to keep interior comfort without accentuated variations. This paper proposes a comparative analysis of a residential building located near a Romanian city, Cluj-Napoca. The elements of the building envelope are designed in three alternative solutions, using as substitute to classical solutions (concrete and polystyrene, masonry and polystyrene), straw bales and rammed earth for enclosing elements. For this purpose there are conducted numerical simulations of heat and mass transfer, using a mathematical model that allows the analysis of indoor comfort, by comparing both objective factors (air temperature, operative temperature and relative humidity) and subjective factors, which are needed to define interior thermal comfort indices P PD a nd P MV. Finally, aset of conclusions are presented and future research directions are drawn.

Cuvinte cheie/Key words: overall building assessment, transient heat and mass transfer, hygrothermal behaviour, natural local materials, architectural archetype

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