The Forecast for the Greenhouse Gas Emission from Electricity Usage: Study Case of Ordnance Engineering, Chulachomklao Royal Military Academy

Abstract

This research aimed to forecast the Greenhouse Gas emission of Ordnance Engineering, Chulachomklao Royal Military Academy. According to the emission from 2556 – 2565 B.E., it was found that the emission from electricity was 7,667.76 kgCO2eq per year. The forecast was from decomposition forecast and seasonal index because they were suitable methods. The forecast for the Greenhouse gas emission from 2566-2573 B.E. is 6,917.50 kgCO2eq per year and reducing trend is 78.62 kgCO2eq per year which equals 1.03 percent reduction. There were 2 simulation of Greenhouse gas emission. The first simulation was the installment of solar system in existing building which had rooftop of 482 square meters. By using the PVsyst to simulate the ability to generate electricity of solar cells, it was found that electricity will be generated from it 141.11 units per year. And it can reduce the Greenhouse gas emission from electricity 74.34 kgCO2eq per year which equals 0.97 percent reduction. The second simulation was to change 165 fluorescent light bulbs to LED. This can reduce 2,477.68 kgCO2eq emission per year which equals 32.31 percent. Both methods can reduce electricity usage 2,630.64 kgCO2eq per year which equals 34.31 percent and the goal of reducing the Greenhouse gas emission of Ordnance Engineering can be achieved, according to Energy Efficient plan 2558–2579 B.E.