Modeling of a domestic frost-free refrigerator
Modeling of a domestic frost-free refrigerator
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DOI：
10.1016/j.ijrefrig.2006.06.006
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发表时间：
2007-03
期刊：
影响因子：
--
通讯作者：
J. Gupta;M. Gopal;S. Chakraborty
中科院分区：
文献类型：
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作者：
J. Gupta;M. Gopal;S. Chakraborty
本研究建立了家用无霜冰箱的综合热流模型。在三维非结构网格环境下，采用守恒控制体列式求解控制方程，并结合相应的边界条件。并通过实验验证了本计算模型的预测结果。结果表明，计算结果与实验结果定性地吻合，但在得到的精确数值方面存在一定的差异。对于冷冻室，计算预测的温度略高于实验值，而对于冷冻室，计算值低于相应的实验观测值。实验和计算结果之间的差异可能归因于缺乏关于空气流量的准确数据，以及通过门垫片和压缩机的未计算的热传输率。通过对制冷机的传热和流动分析，对设计提出了改进意见，以提高制冷机的性能。
In the present study, a comprehensive thermo-fluidic model is developed for a domestic frost-free refrigerator. The governing equations, coupled with pertinent boundary conditions, are solved by employing a conservative control volume formulation, in the environment of a three-dimensional unstructured mesh. Experiments are also conducted to validate the results predicted by the present computational model. It is found that the computational and experimental results qualitatively agree with each other, although certain discrepancies can be observed in terms of the exact numerical values obtained. For the freezer compartment, the computationally predicted temperatures are somewhat higher than the experimental ones, whereas for the refrigerating compartment, the computed temperatures are lower than the corresponding experimental observations. The difference between experimental and computational results may be attributed to the lack of precise data on the airflow rates and the unaccounted heat transfer rates through the door gaskets and the compressor. From the heat transfer and fluid flow analysis, certain modifications in the design are also suggested, so as to improve the performance of the refrigerator.