An investigation of a top-mounted domestic refrigerator
An investigation of a top-mounted domestic refrigerator
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DOI：
10.1016/j.enconman.2010.01.016
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发表时间：
2010-07
影响因子：
10.4
通讯作者：
Kai-Shing Yang;W. R. Chang;I. Chen;Chi-Chuan Wang
中科院分区：
文献类型：
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作者：
Kai-Shing Yang;W. R. Chang;I. Chen;Chi-Chuan Wang
本文对顶置式家用电冰箱的性能进行了详细的数值模拟，并以一台真实的电冰箱为例进行了实验验证。结果表明，数值模拟的温度分布与实验测量定性一致。由于开/关控制策略，在冷冻室、冷藏室和蔬菜室中发生循环温度变化。然而，发现冷冻室和冷藏室的温度变化彼此同相，而蔬菜室的温度变化与其他两个室大致不同相。模拟结果表明，风道的设计及其位置可能会对冰箱内的温度均匀性产生不利影响，但气流受到重力的强烈影响。研究还发现，冷藏室具有最严重的温度不均匀性。为改善冷冻室和冷藏室的温度不均匀性，提出了一种改进的设计方案，该方案结合了风道设计和适当的进风口位置。通过这些改进，冷藏室的最大温差和温度变化的均方根分别从7.17 ° C和3.17 ° C降低到3.57 ° C和1.55 ° C。
A detailed numerical simulation of the performance of household refrigerator having a top-mount configuration is made in this study, and an experiment is carried out with a real refrigerator for verification. The results indicate the temperature distributions from the numerical simulation are qualitatively in line with the experimental measurements. Cyclic temperature variations occur amid freezer, refrigerating, and vegetable compartments due to on/off control strategy. However, it is found that the temperature variation for freezer and refrigerating compartment are in phase with each other while the temperature variation in vegetable compartment is roughly out-of-phase with the other two compartments. The simulations show that the design of air duct and its locations may impose a detrimental role on the temperature uniformity within the refrigerator, yet the airflow is strongly influenced by gravity. It is also found that the refrigerating compartment possesses the worst temperature non-uniformity. For improving the temperature non-uniformity, a modified design incorporating the air duct design with appropriate locations of the inlet openings in the freezer and refrigerating compartment is proposed. Though these modifications the maximum temperature difference and the root mean-square of temperature variation in refrigerating compartment, had been reduced from 7.17°C to 3.57°C and from 3.17°C to 1.55°C, respectively.