Abstract:
The purposes of the research were to analyze the electricity power usage and to propose measures to save electricity costs for government controled building, according to the Energy Conservation Promotion Act BE 2535 of Muban Chombueng Rajabhat University, Ratchaburi Province. The buildings located in the university were used to collect research data comprising of 46 buildings. Fire (5) buildings, were used as the sample for this work. The tools used in the research were survey questionnaires and recording of electrical energy usage Kilowatt-hour Meter, Electric power voltage and electric current meter.
The research findings showed that: 1) the university had taken many steps to reduce the use of electricity, but the trend of electrical energy costs has increased continuously. From analyzing electrical energy consumption data of the sample buildings, the proportion of electrical energy usage was mainly in air conditioning and lighting systems. The most common causes of wasteful electrical charge were the old electrical equipment that had been used for over 10 years, with low efficiency and lacked of maintenance;
2) After various measures to save electricity costs were examined, there were seven practical measures implemented to save electricity costs more than 5%, which consisted of 3 measures of lighting systems and 4 measures of separate air conditioning systems. After all measures were taken to experiment with the 5 sample buildings, every measure saved electrical energy more than 5%, compared to not being applied. In regards to lighting system measures, the most energy-saving was switching to use the energy-saving LED lamps. Each set of LED lamps saved electrical energy of 25.4 Watt, representing 58.39% savings from the original type of lamps. In addition, this category has high investment and payback period of 2.17 years. According to the air conditioning system measures, the highest energy-saving category was reducing air conditioning usage by at least 1 hour/day. This measure can save electricity costs by 12.49% compared with non-use guidelines and can save energy costs immediately when implemented. However, the category that saved minimum energy costs was maintenance of a split-type air conditioner, which can save electricity costs, down by 7.78 percent compared with non-maintenance.