Refrigerators account for 20–30 % of household electricity consumption, with the compressor contributing to 80 % of the total consumption. Therefore, it is essential to increase the compressor efficiency. One approach to enhance compressor performance involves increasing heat dissipation to lower the temperature of the suction system and boost the refrigerant density entering the suction chamber. To achieve that innovatively, we harnessed the waste vibration of the linear compressor body to create a gap flow between the body and the housing, enhancing compressor performance by augmenting heat dissipation. Measurements of gap flow temperature, cylinder surface temperature, and heat flux on the cylinder surface were conducted, varying the RPM, gap size, and the shape of the gap flow path. We also observed variations in the gap flow rate with RPM and stroke. The results revealed that gap temperature and heat flux increased with higher RPM and smaller gap size, and the application of ribs to the gap flow path proved to be more effective in enhancing temperature and heat flux. Additionally, it is anticipated that heat flux will further increase with a longer stroke as the flow rate increases. Therefore, to optimize heat dissipation through gap flow using the waste vibration of the compressor body, it is advantageous to employ a smaller gap size, higher RPM, longer stroke, and apply ribs to the gap flow path. Future research should focus on verifying the effectiveness of increased heat dissipation and improved Energy Efficiency Ratio (EER) through actual compressor experiments.

中文翻译：

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线性压气机机体​​无用振动引起间隙流强化传热的可行性研究


冰箱占家庭用电量的20-30%，其中压缩机占总用电量的80%。因此，提高压缩机效率至关重要。增强压缩机性能的一种方法涉及增加散热，以降低吸入系统的温度并提高进入吸入室的制冷剂密度。为了创新地实现这一目标，我们利用线性压缩机机身的废振动在机身和外壳之间产生间隙流，通过增强散热来提高压缩机性能。改变转速、间隙尺寸和间隙流路形状，测量间隙流动温度、气缸表面温度和气缸表面热通量。我们还观察到间隙流量随转速和行程的变化。结果表明，间隙温度和热通量随着转速的升高和间隙尺寸的减小而增加，并且在间隙流道中应用肋条可以更有效地提高温度和热通量。此外，预计随着流量的增加，热通量将随着行程的延长而进一步增加。因此，为了利用压缩机本体的废振动来优化通过间隙流的散热，采用较小的间隙尺寸、较高的RPM、较长的冲程以及在间隙流道上应用肋是有利的。未来的研究应侧重于通过实际压缩机实验来验证增加散热和提高能效比（EER）的有效性。