Developing thermal comfort model through regional budget expenditure analysis towards low energy consumption in public building facility (case object: government building in north and south of Jakarta)

Abstract

Building efficiency policy has implemented Indonesia. However, energy consumption in building sector remains significantly increased. Jakarta Government relied on AC in providing a comfortable condition for its service it consumed 57% of its total energy consumption. Current available energy monitoring method based on the expensive electrical device, so a new method using regional budget expenditure is developed in this research. This study established: Field study (6 buildings), regional budget expenditure analysis (313 buildings) on thermal comfort and building energy in 112 administrative office building equipped with Natural air ventilated (NV) and Air Conditioned (AC) and 224 building occupants/building manager were taking part in this research. Quantitative method used in this research with variables: thermal comfort (Air temperature, Relative humidity, radiant temperature, Air velocity, and personal clothing index) with Fanger’s Predicted Mean Vote (PMV) method calculation. Another variable used in this research is government standard for Building Energy Consumption Index (IKE) through regional government budget analysis. During an early stage, the budget analysis shows 6 out of 112 office buildings energy consumption (electricity) categorised as ‘extravagant.’ Field study higher IKE caused by too cold temperature setting, underperformed Air Conditioning System, building envelope and ventilation or ‘inappropriate’ building orientation (facing east-west).