Development of a methodology for calculating the consumption of a combined renewable energy source for a mini-workshop

Abstract

A methodology for calculating the consumption of combined alternative energy sources is proposed. The provision of electrical energy to the mini–workshop area for 7 hours a day with equipment that constantly consumes 5.5 kW of electricity was considered. The amount of electrical power needed to meet daily needs has been calculated. It is Rd = 38.5 kWh. Solar stations' daily solar energy output is determined by considering the required backup power. It is Rst = Rd ·2 = 77.0 kWh. The total power of the solar panels is found. It is Rsp = 9.7 kW. The number of solar panels for the proposed Solar LR5-54HTH-435M example is calculated as several panels Nnp = 23.3 pieces. An inverter with more than 5.5 kW was selected in the given example. Anern EVO-6200 has a power of 6.2 kW and an input for connecting a 48 V battery. Its technical characteristics are presented. A scheme for connecting 24 solar panels was proposed, connecting 12 in series into one electrical circuit. There should be two such chains that are connected in parallel. The calculation is made for a Jarrett 120Ah 12V battery. Its capacity is Rb = 1440 Wh. The battery has the technical ability to store 1440 Wh of electrical energy. The batteries should be Nb = 17.4 pieces ≈ 20 to provide a mini–workshop. The choice of a storage station with 20 pieces of Jarrett 120Ah 12V batteries was justified.