Suitability study of using air conditioning system in office building for energy conservation and thermal comfort conditions

Abstract

Presently, Rental office is famous in downtown that near food center and have good transportation. In Thailand, office buildings usually have operating time 8-10 hours per day. So, need to improve the building for energy conservation and employee’s comfort. Glasses are one way that heat transfers occur highly. Overall Thermal Transfer Value (OTTV) is a tool for measure heat transfers through building envelope. From OTTV calculation for existing building, OTTV is 92.94 W/m2 that over ministerial regulations indicate 50 W/m2. Improving building envelope by add more thickness of glasses can reduce OTTV 1.3% and improving building envelope by film installation can reduce OTTV 47.2% and improving building envelope by add shading can reduce OTTV 48.5%. However, each improving policy have each investment cost. Conjoint analysis is consider of many factor to find willingness to pay for each choice. So, set policies for energy conservation, water and waste management and increase comfort are employees to improve energy conservation, water and waste management and increase comfort are 19,935.90, 17,590.50 and 1,563.60 baht respectively, so can improve building envelope by add shading result in OTTV to 47.8 W/m2, Budget 18,000 Baht can be improve organization that payback about 5,400 Baht per year. Increase thermal comfort by install table fan. From the result of research expect to apply to improve rental office in the future.