Determination of building envelope U value in according to building form from heating energy conservation point of view

摘要

In order to prevent excess heat loss for energy conservation, buildings should be designed as passive heating systems. As the most important component of the passive heating systems, external walls have to be mentioned. As the building form is one of the most important parameters with respect to total heat loss of whole building, it has been taken into consideration in detail. In this study building form is represented by the ratio of total facade area to building volume (A/V). As is known the most important design parameters affecting indoor climate and energy consumption in building scale are: orientation, building form and physical properties of building envelope. All of these parameters are related to each other. Therefore, the optimum values of each parameter should be determined depending on the values of each other. The aim of this paper is to introduce a methodology which enables to determine the limit values of building envelope overall heat transfer coefficient in accordance with the ratio of A/V and other design parameters affecting thermal comfort.