Effect of passive techniques in old buildings in Sri Lanka

Abstract

Sri Lankan old buildings are having better indoor comfort relative to the new and remolded buildings in the world .The main objective is to identify the effective passive techniques and to identify the effective usage. This paper describes the specific passive techniques in Old buildings in Sri Lanka and provides a life cycle cost analysis at the end of research project. Sri Lankan old buildings have thicker wall and special walling and roofing materials. Several properties from those properties have been analyzed deeply with considering the environmental background. Inside thermal comfortable of old buildings must be checked to apply those techniques to new buildings. This paper shows the inside conditions of analyzed buildings as numerical values after taking temperature and humidity measurements of the building in day time. This research paper presents the DEROB temperature results with adding old and new building properties to typical building and then it compares the results obtained from computer modeling. Life cycle cost analysis is carried out to compare the results in economical manner for each selected passive techniques. It is used to identify the most effective passive techniques. Final analyzing has been done with numerical values of temperature and cost for construction and maintaining. Some restrains are occurred when adopting old passive techniques to new buildings. This research has been discussed the possibilities and limitations when those properties are adding to new buildings, at the end of the research project.