10.1007/s40095-022-00484-7

A compendious approach for renewable energy assessment based on satellite and ground truth data: Bilate catchment, Rift Valley Basin, Ethiopia

  • Melkamu Teshome Ayana*1,
  • Zerihun Makayno Mada1,
  • Samuel Dagalo Hatiye1,
  • Abdella Kemal Mohammed1,
  1. Water Technology Institute, Arba Minch University, Arba Minch, ET

Published in Issue 2022-03-04

How to Cite

Ayana, M. T., Mada, Z. M., Hatiye, S. D., & Mohammed, A. K. (2022). A compendious approach for renewable energy assessment based on satellite and ground truth data: Bilate catchment, Rift Valley Basin, Ethiopia. International Journal of Energy and Environmental Engineering, 13(3 (September 2022). https://doi.org/10.1007/s40095-022-00484-7
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Abstract

Abstract Energy sources generated from different modes other than the conventional types have become more demanding in combating climate change issues that the world has been facing today. To cater the need for electricity in countries of Africa like Ethiopia can be initiated by such modern practices. The hydro, wind, and solar power output of Bilate in the Central Rift Valley Basin was estimated envisaging satellite information and Hybrid Optimization Model for Electrical Renewable (HOMER). Three off-grid sites located in the central part of the catchment namely Shashego, Weira, and Siraro were considered in this study. The demographic and hydro-meteorological data of the selected sites were collected from various sources and ERA5 climate variables have been utilized at their optimum level to find a better and more accurate solution. Power transformation and variance scaling techniques were applied to correct biases in precipitation and temperature, respectively. Due to rarely available hydrological gauge stations in the catchment, there has been difficult to analyze the data of the stream flows at the sites and hence HBV-IHMS model was used during the study to find an amicable solution for the compliance. The performance of the model was checked before the use and resulted in NSE above 80% in replicating the observed hydrograph. The total power output of the best feasible hybrid system at Shashego, Weira and Siraro site is calculated as 26240 kW, 51298 kW and 46245 kW per annum, respectively. Except in Shashego, the configuration of hybrid systems in Weira and Siraro were technically and economically viable. The system was iteratively reconfigured to check the percent of the load demand of the Shashego site that could have been fulfilled with minimal LCOE but unpredictably it was found that only 50% of the load can be provided without any impairment. The LCOE of hydro is comparably very low in all the sites through the energy output from the scheme was inadequate to accomplish the required demand of the community.

Keywords

  • Bilate catchment,
  • ERA5 satellite products,
  • HOMER,
  • LCOE,
  • Renewable energy

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