Modelling and Simulating of Hybrid Biomass and Solar Microgrid System for Electrification Raya Brewery PLC

Abstract

This research presents a simulation and modeling analysis of a hybrid energy-based microgrid system in Raya brewery factory, which integrates solar photovoltaic panels, biogas generators, batteries, and converters. The system can meet full load of the company annual electricity demand, with PV panels contributing 75% and biogas generator 25%. The study examines the performance of a solar energy model in the Raya Brewery factory found in Mychew town of Ethiopia, using data from sites like Raya Beer. The model estimated solar radiation values, with an average monthly global radiation of 6.4 kWh/m2. From the total 1.12 MWh/day 75% (0.84MWh/day) is covered by solar energy resources and the rest 25% (0.28MWh/day) is covered by the biomass sources of power. The NMSA data reveals variations in solar radiation and energy measurements at the Mychew station, indicating suitability for solar energy applications. The Raya Bear site's Total AH needed per day requirements are 17,500 AH/day, with detailed calculations for an efficient and sustainable system. The numerical analysis of the stand-alone PV system design at Raya Bear site reveals a total daily energy requirement of 840,000 WH/day which is 75% of the total energy demand, with a total ampere-hour requirement of 26,250 AH/day. The system requires 312 PV panels and 156 modules in parallel, with a battery capacity of 103,618.421 AH/day. The solar charge controller size is 4,036.032A, and the inverter capacity is 290.15001 KW. The economic analysis shows a simple payback period of 13.8 years and an equity payback duration of 15.5 years, with the capital cost being the largest expenditure. The financial analysis demonstrates a positive net present value (NPV) and a reduction in CO2 emissions, contributing to environmental benefits. The biomass hybrid system uses a 280-kW generator with a capital cost of $140,000. The proposed scenario results in a significant reduction in greenhouse gas emissions from 9.7 tCO2/year to 1.8 tCO2/year.