Energy Improvement of Building Frames in Government Office Buildings Using Energy Modeling: Case Study of Bang Mae Nang Municipality Office
Keywords:
energy management, carbon dioxide emissions, building energy simulation, energy renovationAbstract
Energy management planning is significant for office buildings. Air conditioning accounts for most of the energy consumption in office buildings. Therefore, the building frame plays a critical role in reducing the load on the air conditioning system. This research aims to evaluate the energy improvement measures of the building frame in office buildings. They’re using the Bang Mae Nang Municipality Office Building in Nonthaburi Province as a case study site. This study utilized energy simulation techniques in the Open Studio and Energy Plus programs. Simulated 20 building framework renovation measures and analyzed the investment returns and economic feasibility. The study found that efforts to change 6 mm thick clear glass to 6 mm thick Low-E glass with B4100 film and add Stay Cool 150 mm thick (M18) have the highest energy-saving potential. With an energy use index of 158.66 kWh/(m2Year), followed by measures to change 6 mm thick clear glass to 6 mm thick glazing glass with B4100 film and add Stay Cool 150 mm thick (M19) and steps to change 6 mm thick clear glass. It is a 6 mm thick Solar Tag glass with B4100 film and 150 mm thick Stay Cool added (M20) with an energy use index of 159.00 kWh/(m2Year) and 159.35 kWh/(m2Year) respectively. Economic analysis found that possible measures for investment at the end of the project had the highest NPV: the measure to install insulation on the building walls, 65 mm thick, and install B4100 (M9) film, equal to 282,957.79 baht with a payback period of 19.59 years, and the measure to change 6 mm thick clear glass to glass. Low-E, 6 mm thick, applied with B4100 film and added to Stay Cool, 150 mm thick (M18), can still reduce the amount of carbon dioxide up to 7,855.95 kgCO2e/year if energy and investment returns are considered. Researchers found that installing insulation 65 mm thick on building walls and adding B4100 (M9) film were the most effective measures among all options. Applying the results and methods of this research can improve the energy efficiency of building frames for other office buildings.
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