School of Mechanical and Industrial Engineering

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Browsing School of Mechanical and Industrial Engineering by Author "Abenezer, Tesema"

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    Design and Simulation of Solar Powered Sprinkler Irrigation System for Kete Dori Onion Farm
    (Addis Ababa University, 2020-02) Abenezer, Tesema; Edessa, Dribssa (PhD)
    Ethiopia is among one of the most populated countries where agriculture is dominant sector in which the seasonal dependency prohibits the productivity of the sector. The availability of many river basin clearly depicts the irrigation potential the country has. The application of solar water pumping technology for irrigation is an innovative and sustainable solution to address this issue. The implementation of this technology can lead to several benefits which include the maximization of productivity by halting the rainfall dependence and improves the living condition of farmers. This research aims at designing and optimization of solar powered sprinkler irrigation system considering the climatic data as it directly influences the irrigation water requirement. Several models are adopted for the evaluation of techno-economic feasibility and environmental aspect. The photovoltaic water pumping system with water storage tank that much the irrigation water demand is proposed and several economic analyses has been conducted to establish the cost effectiveness. Another investigated model is photovoltaic water pumping system with battery storage and conventional diesel fuel generator capable of delivering the same demand. The results show that implementation of both photovoltaic systems is technically viable having performance ratio of 0.779 and capacity factor of 0.22 which is promising. The economic feasibility assessment found that net present cost of $24,224, $25,807 and $77,651 and cost of energy and $0.06/kWh, $0.07615 /kWh and $0.3077/kWh for PV system with tank storage, PV system with battery storage and Diesel system respectively. The environmental perspective benefit has been also addressed by the evaluation of the greenhouse gas emissions. Replacing diesel fuel by PV system that will protect the environment from 17,500 kg/year of CO2, 132kg/year of CO, 4.82 kg/year of unburnt HC, 42.9 kg/year of SO2, 150 kg/year NOx, 8.03kg/year of particulate matters. This study shows that the application of the solar energy for irrigation is viable both technically and economically, and also leads to several environmental benefits including, carbon abatement cost.