Current Issue : October - December Volume : 2020 Issue Number : 4 Articles : 5 Articles
Over 17% of the worldâ??s population lack access to electricity, the majority being in rural areas of sub-Saharan Africa and South\nAsia. Microgrid technologies are a promising solution towards rural and remote area electrification; however, ever-increasing\nelectricity demand remains a big challenge leading to pronounced power outages. Demand-side management is an indispensable\ntool towards addressing the challenges. This paper employs a mathematical model based on incentives and time-of-use rates to\nsimulate daily power usage pattern of residential customers using data collected from an isolated village Ngurdoto solar microgrid,\nArusha, Tanzania. Customer responsiveness on the increase in price was evaluated based on the concept of price elasticity of\ndemand. Using two demand response strategies, namely, load shifting (LS) and scheduled load reduction (SLR), the results reveal\nthat LS can achieve up to 4.87% energy-saving, 19.23% cost-saving, and about 31% and 19% peak reduction and power factor\nimprovement, respectively. SLR method resulted in about 19% energy-saving, 49% cost-saving, and 24% power factor improvement.\nThus, the results presented in this study may lead to a more efficient and stable system than the current state in\ndeveloping countriesâ?? utility....
Highly efficient all-inorganic perovskite solar cells require a fast charge transfer from CsPbBr3 to TiO2 to reduce the recombination\nfrom trap states. Herein, we insert a CdS/CdSe/CdS quantum dot (QD) layer between the TiO2 and CsPbBr3 layers to fabricate allinorganic\nperovskite solar cells. By tuning the thicknesses of the CdSe layer of CdS/CdSe/CdS QDs, the conduction band (CB) levels\ncan be adjusted to.......................
The majority of the Ethiopian population lives in rural areas and uses wood for domestic energy consumption. Using wood and fuel\nfor domestic uses accounts for deforestation and health problems, which is also dangerous for the environment. The Ethiopian\ngovernment has been planning to generate power from available renewable resources around the community. Therefore,\ndetermining the water surface potential of energy harvesting with floating solar photovoltaic system by using geographic\ninformation system is used to support decision-makers to use high potential areas. To identify useable areas for floating solar\nphotovoltaic, factors that affect the usability were identified and weighted by using Analytical Hierarchy Processes. Thus,\nweighted values and reclassified values were multiplied to do the final usability map of floating solar photovoltaic with ArcGIS\nsoftware. Due to the improper location of floating solar photovoltaic, efficiency is dropped. Therefore, the objective of this study\nwas to identify the most usable surface of water bodies in Amhara regional, state irrigation dams for generating electrical power.\nThe usability of the water surface for floating solar photovoltaic power plant was 63.83%, 61.09%, and 57.20% of Angereb, Rib,\nand Koga irrigation dams, respectively. The majority of the usable areas were found in the middle of the water surface. Nature\nwater surface is a key factor in generating solar energy; it affects the floating solar photovoltaic and irradiance coming to the\nsolar photovoltaic panel surface....
Two boron dipyrromethene (BODIPY) triads, namely BODIPY-1 and BODIPY-2, were synthesized and incorporated with poly-3-hexyl thiophene: (6,6)-phenyl-C61-butyric acid methyl ester (PCBM) P3HT:PCBM. The photovoltaic performance of BODIPY:P3HT:PCBM ternary solar cells was increased, as compared to the control binary solar cells (P3HT:PCBM). The optimized power conversion efficiency (PCE) of BODIPY-1:P3HT:PCBM was improved from 2.22% to 3.43%. The enhancement of PCE was attributed to cascade charge transfer, an improved external quantum efficiency (EQE) with increased short circuit current (Jsc), and more homogeneous morphology in the ternary blend...
The Ethiopian government looked towards renewable energy resources to generate electrical power for the current demand of the\ncountry. 85% of the total population of the country lives in rural areas and uses fossil fuel for their domestic uses. Using fossil fuel\nposes a danger for users and the environment. And the government of Ethiopia planned to electrify 85% of the rural community\nwith abundant available renewable resources around the community. Therefore, identifying potential locations for solar PV with\nGIS is a decision support tool for proposing suitable sites to the government. The solar PV suitability analysis provides optimal\nlocations for solar PV power plant installations. To find suitable locations for solar PV, factors that affect suitability were\nidentified and weighted using analytical hierarchy processes. Then, the weighted values and reclassified values were multiplied\ntogether to produce the final suitability map for solar PV. Due to site unsuitability, solar PV generation efficiency drops and\nmay malfunction. By identifying the most suitable locations, a solar PV power plant is optimally located. Therefore, the\nobjective of this study was to find the most suitable sites in the South Gondar Zone for generating power from solar PV. The\nsuitability of the study area for a solar PV power plant is 86.5%. Eighty-six (86%) of the criteria considered in the study area\nwere found to be suitable for optimal location of solar PV power plant. Most of the suitable areas were found in the western\npart of the zone. The nature of topography is a key factor in generating solar energy; it affects the solar irradiance coming to the\nsolar PV panel surface....
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