Relation between building envelope U-value and building form.

This study aims to introduce a methodology which enables to revise the limit values of overallheat transfer coefficient in accordance with the building form from thermal comfort andenergy conservation point of view.In order to prevent excess heat loss, building should be designed as passive heating system.Overall heat transfer coefficient (U-value) of building envelope and building form can beconsidered as the most important parameters of the passive heating system. Therefore, U-valueof building envelope should be determined depending on building form. Building formcan be defined based on the shape factor (the ratio building length to building depth), heightand roof type. It is possible to determine a lot of building forms which yields same volume,but different facade area. Therefore, the ratio of building volume to total facade area (V/A) isthe best indicator describing the building form. Thus, U-value of building envelope should bedeterminedin accordance with the ratio of V/A.In this study a methodology which aims to determinethe limit values of building envelope U-valuein accordance with the ratio of V/A is introduced.