Design And Experimental Investigation Of Solar Cooker With Thermal Energy Storage

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Cooking is the major necessity for people all over the world. It accounts for a major share rnof energy consumption in developing countries. Therefore, there is a critical need for the rndevelopment of alternative and affordable methods of cooking. Solar cooking is a novel rnand eco-friendly method of harnessing sun’s energy. Solar cookers can be of a great use rnin saving fuel and enabling in eco-friendly cooking of food. rnSolar energy is available during daytime only and also intermittent. So, thermal storage is rnimportant for indoor solar cooking requirements and will ensure continuity of service, reduce rnthe use of conventional energy, and give a reasonable cooking time compared with rnconventional cooking. The solar cooker designed for this study is1.5rnaperture area of rncompound parabolic dish concentrator integrated with thermal storage media (1.5litter of oil rnand 0.74kg of rock) as an absorber (area of 0.4rn)to increase the duration of the effective rnenergy storage period without tracking and utilize thermal energy for night cooking. rnThe overall system is designed with an assumption to cook 1kg of rice in 45minutes requiring rnpower of 522W which is obtained from the stored energy from the sun. Therefore, the rnnumerical simulation, experimental test, and validation of the two results are done. An rnabsorber with thermal storage is simulated by COMSOL software to show temperature rndistribution. As it is shown in the simulation section, the temperature of TES could rnreach365K after 6hours. Where as in the experimental result, due to so many losses the rnenergy reduced in some extent and it reaches 354K. Even if it has low energy, it can cook rnthe required food by placing TES in the insulated tank during discharging. Therefore, there rnwere deviations between experiment and simulation because the model did not account the rnbasic losses and frustration of solar radiation in case of numerical simulation. The model of rnthe TES system was validated with experimental results and a brief reason was found between rnexperiment and simulation for the charging cycle. rnThe discharging of TES is started after it is lifted from solar collector and it is placed on the rninsulated tank and loaded by pot with water. This is maximum temperature of water reached rnafter 40 minutes is 355K (82℃).

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Design And Experimental Investigation Of Solar Cooker With Thermal Energy Storage

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