Performance analysis of a hybrid solar photovoltaic - grid water pumping system for National Water and Sewerage Corporation- Western Uganda.
Loading...
Date
2023-05
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Kampala International University
Abstract
This thesis illustrated a comprehensive study of using a hybrid solar PV-grid water pumping system. This system is applied on Kashaka-Bubaare community located in Western Uganda which has an average water consumption of 240m3/day. This study provided detailed system sizing and economic assessment. Sizing such a system for solar PV wascarried out by using software tool such as MATLAB /Simulink software. A 115 m deep well with capacity of 12m3/hour 7500W pump, with a solar PV capacity of 17500W The results showed that the solar PV supply would supply 72m3/hour of water for 6hours to steel elevated tank of 300m3 capacity .The 168m3 water supply was powered by grid supply system, hence the system ensure a sustained energy saving management system while ensuring constant water supply by reduced cost of power supply from grid during pumping tines for off peak tariff of 356.9 Ugandashillings while shoulder and peak periods of 584.6 Uganda shillings and 788.8 Uganda shillings respectively, the solar PV is applied to pump water. The economic assessment of the hybrid solar PV –grid system when compared to Solar PV alone (standalone) and the grid supply alone ,showed the that NPV for the hybrid solar PV-grid is 220,227 Uganda shillings compared to the NPV of 127,874 Uganda shillings and 152,065 Uganda shillings for solar PV and grid respectively. TheLevelised cost of energy (LCOE) for the hybrid solar PV –grid system was 3.63057 Uganda shillings/KWh compared to the solar PV (standalone) with 4.22507 Uganda shillings /KWh and grid only with 5.01026 Uganda shillings /KWh, which indicated the that hybrid system is more feasible to implement due to higher NPV and low LCOE compared to solar PV and grid only. Therefore this justifies the application of the hybrid system in different scenarios other than water pumping systems.