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Abstract : Effect of Series and Parallel Shading on the Photovoltaic Performance of Silicon Based Solar Panels
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Abstract: In this research work silicon based solar panels were used to investigate the impact of series and parallel shading on the photovoltaic performance of inorganic solar panels. The results showed that voltage, current and power of the solar panels were reduced upon shading the series and parallel cells. This decrement was seen to be larger for the series shading compared to that of the parallel shading. This was attributed to the adverse effect of the series resistance of the shaded cells, which is acted as a bottleneck in front of the passage of current. This was not very effective in the parallel shading because current is readily capable to pass through the illuminated parallel cells and neglect the pathway of parallel shaded cells. From the results, it was concluded that the lower performance of solar panels due to shading effect is because of the change in the internal resistance of the panels. This situation is possible to occur during daily life use of solar panels as a result of the shading by clouds, dusts or trees. Hence, considerable investigation towards solving this problem is of great importance. Keywords: Solar panel, partial shading, photovoltaics, I-V characteristic.Download Full Article |
Abstract : Numerical Prediction of Thermal Storage Using Phase Change Material
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Abstract: A numerical mathematical model has been developed to predict the thermal behavior of phase change material during thermal storage. The model includes the effects of various mechanisms of heat transfer such as conduction, convection as well as fusion of the phase change material. Water/Ice was used as a phase change material. The thermal behavior of the phase change material during cooling has been studied experimentally and analyzed under different conditions. Comparisons were made against experimental data for validation of the predictive model. The model fairly predicted experimental data obtained at various inlet conditions. Keywords: Phase change material, thermal storage, numerical model, simulation.Download Full Article |
Abstract : Mathematical Modelling of Portable Solar Water Distillation System
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Abstract: Portable Solar Water Distillation (PSWD) system can provide drinking water and hot water simultaneously to households. It utilizes solar radiation to heat the water and produce fresh water out of the saline or brackish water & also produce hot water. The paper focuses mainly on field performance of a new design of PSWD for domestic applications in remote and hilly areas. Field Performance data of PSWD system has been recorded during summer and winter in northern region. It is observed that on Solar Global Radiation 2.3 kWh/ 0.25 m2, maximum output of distilled water generation of 1.2 liters/day per 0.25 m2 was achieved and average temperature of hot brackish water has reached 420C at ambient temperature of 230C within 8 hours. This system is the most efficient and cost effective. It can produce pure, clean fresh water along with hot brackish water from any water source. Keywords: Solar energy, mathematical modelling of PSWD system, hot brackish water.Download Full Article |
Abstract : Numerical Modeling, Simulation and Validation of Hybrid Solar Photovoltaic, Wind Turbine and Fuel Cell Power System
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Abstract: The energy conversion equations describing the total power generated by a hybrid system of solar photovoltaic, wind turbine, fuel cell as well as hydrogen storage were presented, and integrated simultaneously. For the purpose of validating, this simulation model, the aforementioned equations were coded with MATLAB V13.2 and used for optimization and design purposes. A block diagram approach was used during the simulation with MATLAB. In order to validate and tune up the predicted output results, on-site data was used to validate the simulation program under various conditions. Comparison between the data and predicted results showed a fair agreement. Keywords: Modeling, Simulation, Hybrid System, Photovoltaic, Wind turbine, Fuel Cell, Hydrogen Storage, Experimental Validation.Download Full Article |
