Conference Papers
Permanent URI for this collectionhttps://idr.nitk.ac.in/handle/123456789/28506
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Item Numerical Investigation on the Effect of Various Geometries in a Solar Box-Type Cooker: A Comparative Study(Springer Science and Business Media Deutschland GmbH, 2021) Anilkumar, B.C.; Maniyeri, R.; Anish, S.The solar energy as a renewable energy has been the primary interest of many researchers for the last four to five decades due to its wide applications such as domestic cooking systems. The present study aims to investigate the effect of various box geometries such as rectangular, trapezoidal, cylindrical and frustum of a cone on the performance of solar cookers. In this study, various heat losses (convective and radiative) from the cooker cavities are analysed by simulating the condition using commercial software ANSYS16. The results of numerical analysis of rectangular cavity box-type cooker are validated by comparing with experimental results. The results show that trapezoidal cavity box-type solar cooker has higher absorber plate temperature and minimum heat losses than all other geometries operating under the same conditions. © 2021, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.Item Performance Comparison of Different Geometries of Thermal Energy Storage Unit for Solar Cooker(Springer Science and Business Media Deutschland GmbH, 2023) Anilkumar, B.C.; Maniyeri, R.; Anish, S.Many researchers have been interested in solar energy as an unlimited energy resource over the last few decades due to its vast range of applications, including household cooking. The present work aims to design, optimize, fabricate, and test different geometries of thermal energy storage (TES) units for solar cooker (SC) using paraffin wax as the phase change material (PCM). The optimum amount of PCM necessary for different geometries (cylindrical, square, and hexagonal) of TES units surrounding the cooking vessel is computed using a computational approach. The TES units developed in this study have the provisions for filling the PCM on all sides, including the lid, enhancing the heat transfer to the cooking load. The performance comparison of different TES units is carried by conducting the indoor test. The experimental findings show that after 6 h, all geometries of TES units maintain the temperature of the cooking load at the melting point of PCM. However, cylindrical-shaped TES unit performs best in comparison with hexagonal and square. A cylindrical box solar cooker performance test is also carried out with an optimized cooking vessel surrounded by the PCM-filled TES unit and lid. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.Item Performance Evaluation of Solar Cookers Using Multi-Criteria Decision-Making Methods(American Institute of Physics, 2024) Anilkumar, B.C.; Maniyeri, R.; Anish, S.The prime objective of the present study is to select the best solar cooker among the alternatives using multi-criteria decision-making (MCDM) methods. The criteria and alternatives for the analysis are taken from the previous study on solar cookers with different geometrical designs. It is difficult to identify the optimum from different alternatives by comparing the criteria values. In the present work, the optimum solar cooker is selected with the aid of technique for order preference by similarity to ideal solution (TOPSIS) and evaluation based on distance from average solution (EDAS) methods. The criteria weights required for the optimization algorithm are found by using ENTROPY and CRITIC methods. Also, TOPSIS and EDAS methods with equal criteria-weights are carried out. The optimization algorithms are solved using MATLAB. The results show that a novel solar box cooker (NSBC) with finned absorber plate performs best compared to a sun stove unit, conventional box-type, dish and trough type parabolic solar cooker. © 2024 American Institute of Physics Inc.. All rights reserved.