This study aims to assess the potential of coupling solar PV power plants with Battery Energy storage system (BESS) to curtail load-shedding and provide a stable and reliable baseload power generation in Zimbabwe. Data from geographical surveys, power plant proposals, and investment information from related sources were reviewed and applied accordingly. Areas considered to be of good potential to employ the use of BESS were identified considering such factors as feasibility of PV plants, proximity to transmission lines, the size of a town or neighborhood, and Energy demands for BESS Return On Investment (ROI) calculations. Previous studies have proven that 10% of the suitable land for PV systems has the capability to generate thirty times the current power demand of the nation operating even with the least efficiency. In recent years, coupling renewable Energy sources with a suitable Energy storage system yielded improved performances, giving consumers a reliable, stable, and predictable grid. BESS technologies on the utility scale have improved in recent years, giving more options with improved safety, and decreasing the purchase costs, too.

Cooling Energy storage systems can be used, coupled with conventional building cooling systems. purpose of the study was to examine the performance of the cooling Energy storage system (CESS) in partial storage mode (PSM). Objective functions were considered as the exergy efficiency and the total cost rate. The multi-objective technique in MOPSO and SEAP2 algorithms were used to optimize the objective functions. The results obtained from the multi-objective analysis indicated a difference in the optimal value of designing points relative to single-objective optimization, objective function 1 (exergy efficiency), and objective function 2 (total costs). The maximum exergy efficiency for the multi-objective mode in PSM was 39.12%, and the minimum total cost for the multi-objective mode in PSM was $ 1,152 × 105. Additionally, a study on the model showed that by using ice thermal Energy storage (ITES), electricity consumption reduced by 11.83% in PSM. Furthermore, because of the transfer of cooling load from peak hours to low consumption hours and reduction of power consumption by 35.12%, there is a reduction in functional costs in PSM compared to a traditional air conditioning system. The results showed that the payback period for an ITES system in PSM is 3.43 years. Ultimately, one has to note that using the ITES system reduces co2 production, leading to a reduction in environmental pollution. Additionally, PCMs used in the construction industry have been introduced and compared with each other in terms of exergy efficiency. The results show that magnesium nitrate hexahydrate reaches the highest oxygen efficiency.

A light rail system which runs on 100% renewable Energy named the “ Solar Light Rail” has been proposed by authors. Experiments using a prototype model have been carried out to demonstrate the availability of the rechargeable power supply method using supercapacitors. In the experiments using the updated equipment, the experimental condition is changed from the passed experiments, and the Energy consumption per run is decreased. Low Energy consumption causes running for a longer time after sunset. The handmade equipment is more efficient and makes the better result by the improvement.

Globally excessive consumption of hydrocarbon fuel in transport sector is a serious threat to the civilization due to the paucity of fuel in future. Also this growing use of vehicles for transport is contributing about 70% of total air pollution and causing environmental and ecological imbalances. Thus the worldwide fast depletion of conventional Energy resources and impact of emissions on environment necessitates the search of alternative non-conventional Energy sources, and other direct Energy conversion systems. This paper deals with the study of sustainable renewable Energy resources and their conversion system. Air has been considered as a sustainable renewable Energy resource and an emission free compressed air driven engine has been analyzed for better and sustainable Energy future in this paper. Here parametric study of a vane type novel air turbine is carried out for arriving at optimal turbine specifications and operating conditions. The optimum power output obtained ranges from: 1.0 kW, 4.0 kW and 9.0 kW at D=50 mm, 100 mm and 150 mm respectively, when rotor/ casing ratio (d/D) = 0.70, vane angle (q) is kept 30o to 45o (vanes =12 to 8 nos.), and other parameters such as: injection angle (60o), injection pressure (6 bar) and speed of rotation (2500 rpm) are kept constant throughout the study.