Abstract:
In this study, we aimed to create smart meters for use in electrical energy management in an energy garden. A smart meter that is designed and built can be made according to the requirements, measure the electrical energy of each electrical device, communicate with electrical devices, can turn on-off electrical devices through a smartphone meter, and be able to alert the user when the use of electricity exceeds the limit. Based on the requirements, the researcher selected a combination of main electronic components, namely a NodeMCU (ESP-8266) microcontroller, a Pzem-004T power sensor, a relay (Relay), a smartphone, and a Blynk application to connect to electrical devices. Then bring the aforementioned devices to build a smartphone meter according to the Single Line Circuit Smartphone Meter and send it for testing. Accurate electricity measurement at SGTech, Naresuan University showed measurement results compared with YOGOKAWA testing machines for R, RC, and RL loads. The average tolerance for voltage is 0.32%, 0.42%, and 0.45%, respectively, and the average current tolerance is 0.17%, 0.38%, and 0.34%, respectively. The study of the energy management model in the energy park using a smartphone meter found that the smartphone meter can help reduce electricity consumption. On average, there was a decrease of 15.23 percent in the use of electricity in the energy garden at Kamphaeng Phet Rajabhat University, and the results of the study on the energy use of air conditioning found that using a smartphone meter to control the temperature of the air conditioner can reduce energy consumption by a decrease of 14.63 percent for the energy garden office at Kamphaeng Phet Rajabhat University and reduced to 15.75 percent for general residential buildings. In addition, a study on the energy consumption of air conditioners found that setting the temperature at 2829 degrees Celsius consumed the least energy at 13.74 -14.08kWh