Publikacje

Abstract:

The paper presents simple methodology for calculating the optimal insulation thickness. The results of a given solution implementation depend on the quality of energy supply and fuel prices. Assuming that the total costs following renovation is the sum of the costs of heating and thermal upgrading, it was shown that when calculating the optimal insulation thickness should take into account the thermal resistance of the outer walls. Such calculations, in addition to the characteristics of the heat source, should be carried out taking into account local weather conditions. The study presents the results of such calculations for the building heated with gas and the air-source heat pump. The results of the investigations are referred to the mean climatic conditions recorded in the ten last years. It was found out that for thermal upgrading with the use foamed polystyrene having the optimum thickness, total investment costs are almost the same, regardless of polystyrene thermal properties. The same also refers to energy costs. The paper also provides sample calculations for plaster, whose main ingredient is perlite. In the case of internal thermal upgrading of the historic buildings such isolation is recommended in order to prevent of moisture dropping off inside the envelope.

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Optimal thickness of various insulation materials for different temperature conditions and heat sources in terms of economic aspect