Abstract:
This study aims to design and install a real time power monitoring system based on the power consumption context by surveying the number of electrical appliances and working hours, design and install the power monitoring system. Power consumption is displayed in real time via websites of School of Energy and Environment. Power consumption data are collected and analyzed for 1 year between April 2020 and March 2021. The survey results in the amount and hours of use of electrical appliances of the School of Energy and Environment. It was found that air conditioning systems make the most contribution of power consumption accounting for around 86 percent of the total power consumption, the 2nd floor showed the most consumption in the building. The survey results were analyzed to design and install power meter for 4 sets according to the 3 groups of users consisting of head office group, student group and researcher group. The monitoring results on power consumption of School of Energy and Environment for a period of 1 year showed that the total power consumption during considered period was 237,445.29 kWh, representing an expense of 409,167.04 baht and greenhouse gas emissions of 59,221.40 kgCO2e. The power showed highest consumption in May, 2020 of 13,789.23 kWh and lowest consumption in February, 2020 of 6,651.39 kWh. When considering for time of consumption, School of Energy and Environment is consumed power on the high demand period (On peak), Monday - Friday from 09.00 - 22.00 oclock, which is consistent with the working context of the government agency. In addition, the results indicated that power consumption on the 1st and 4th floor is frequent part-time work caused by the amount of power consumed during the low demand period (Off peak) is close to the period of high demand period (On peak). Reducing the time to use air conditioners by 2 hours per day and turning off the lamps at noon for 1 hour per day can reduce the power consumption around 1,500 kWh/month and 28 kWh/month respectively. In addition, costs and greenhouse gas emissions are decreased as well. Design and installation of a power monitoring system creating the School of Energy and Environment recognized the amount of power consumed in each area lead to be defined the actual power reduction policy and to be set the goals, areas, and locations to reduce power consumption appropriately