Design and optimization of hybrid solar pv, micro hydro and biomass power generation: the case of kedemesa kebele, agaro woreda, jimma zone

Abstract

Ethiopia is one of the developing countries in the horn of Africa with a total population of over 80 million in 2007. Population where is living in rural areas, mostly access to modern electricity is difficult. Kedemesa kebele is found around 82 km away from Jimma town at 1675.2m above sea level having latitude of 7.510N and longitude 36.350 E for the specific study site is found. And has no electricity access from grid connection. Objective of the thesis would focus on Design and Optimization of Hybrid Solar PV, Micro Hydro and Bio-Mass Power Generation in the selected site .The study area has an average 6.6325 sunshine hrs per day. The incoming average solar energy has been converted in to 5.16 kWh m2 ⁄ /dusing Angestron model. The flow rate of Naso River was found 1.22m3⁄s from the flow rate of Gigel Gibe I through empirical area ratio method. Monthly average biogas feedstock (i.e. cow dung), the kebele is 1.35 tonnes⁄day . To produce18 KW from Solar PV system 416 modules, having 83m2 area and Solar insolation at the site during the worst month at July is 3.86kWh m2 ⁄ /dwas used. For the Micro-hydro to produce 63KW, 1.22m3⁄s flow rate, 8.1m head, 65% efficiency and 0.36m weir length, 2.13 m2 canal area and 100 m penstock length was found. To produce 20 KW from Bio-mass system through the processes of anaerobic digestion mechanism, I have to found that daily an average of 70.6 m3⁄day biogas production could be found. The homer software has been design and cost estimation of each components of the hybrid system (i.e. Solar PV-Biomass-Micro-hydro power generation) has been modeled. Hence the designed peak power demand at installed capacity after 10 year is around 122.24 KW. The output power generation was seen that from homer software is 209 kW to satisfy power demand from customer side at specific area of site was got saved. Since EEPCO can sells for urban is 0.025$⁄kWh and for the rural is double price that is 0.05$⁄kWh because of by considering transmission line cost, maintenance cost and transportation cost. The hybrid system is cost would found around 0.031$⁄kWh. So that from Economic Point of View the hybrid system is feasible.