Improving Electrical Loads and Designing a Solar Energy System ‎for a Government Facility in Hilla City

Abstract

This research focuses on calculating and improving electrical loads and designing a solar system for a governmental building in Hilla city (Hilla Electricity Training Center). The building operates for 7 hours a day and 22 days a month. The current loads were calculated and were found to be 76% cooling loads, 9% lighting loads, and 15% other loads. Cooling loads are the highest in energy consumption, so the existing traditional cooling devices were replaced with inverter ones. According to the hours of use at the selected location, the percentage improvement in electrical energy consumption for cooling loads is 35%. The lighting load consumption was improved by 55%, as the regular CFL lighting with a capacity of 80 watts was replaced with LED lighting with a capacity of 36 watts. The total improvement in the loads was 31.5%. After the load improvement step, a solar system was calculated and designed to cover the new loads after improvement. The solar system consists of 452 bifacial panels, 580 W, and 150 Lithium batteries, 200 Ah, 48V.