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Numerical modeling and parametric study of an innovative solar oven

机译：创新型太阳能烤箱的数值建模和参数研究

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摘要

A unique design of a double glazed box-type solar oven with flat foldable external reflectors at the top and front and an internal reflector beneath the L-shaped absorber plate is numerically and parametrically studied. The maximum temperatures attained in the absorber cavity of the oven are observed to be in the range of 100-135 degrees C. A numerical model is formulated to solve the overall energy balance on the absorber plate of the proposed solar oven by incorporating the effects of the top, front, and bottom reflectors for a given set of input parameters. CFD simulations are utilized to predict the unknown buoyancy driven convective heat transfer coefficient from the L-shaped absorber plate to the surrounding glass cover forming an enclosure. Modeling results are found to be in good agreement with the experimental results which leads to the parametric study of the solar oven. The effects of various design parameters on the oven's performance such as spacing between glazings, influence of the vertical component of the absorber plate and internal reflector, glazing thickness number of glazings and the effect of absorber plate coatings are also discussed.
机译：对双层玻璃箱式太阳能烤箱的独特设计进行了数值和参数研究，在顶部和正面均具有可折叠的外部反射器，在L形吸收板下方具有内部反射器。观察到在烤箱的吸收腔中达到的最高温度在100-135摄氏度的范围内。通过结合以下方面的影响，建立了一个数值模型来解决建议的太阳能烤箱的吸收板上的总能量平衡。给定一组输入参数的顶部，顶部和底部反射器。 CFD模拟用于预测从L形吸收板到形成外壳的周围玻璃盖的未知浮力驱动的对流传热系数。发现建模结果与实验结果非常吻合，从而导致了对太阳能烤箱的参数研究。还讨论了各种设计参数对烤箱性能的影响，例如窗玻璃之间的间距，吸收板和内部反射器的垂直分量的影响，窗玻璃的窗玻璃厚度数以及吸收板涂层的影响。

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