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Experimental investigation of the thermal performance of closed loop flat plate oscillating heat pipe
Experimental Heat Transfer ( IF 3.5 ) Pub Date : 2020-01-23 , DOI: 10.1080/08916152.2020.1718802
Kamlesh Mehta 1 , Nirvesh Mehta 2 , Vivek Patel 3, 4
Affiliation  

ABSTRACT A number of theoretical studies and experimental investigations have been carried out on the closed loop flat plate oscillating heat pipe (CLFP-OHP) in the past decades. However, due to the complex working mechanism of CLFP-OHP, the effects of operational and geometrical parameters on the thermal performance CLFP-OHP have not been completely revealed so far. In the present study, the CLFP-OHP was investigated with different operational parameters (charge ratio, orientation, and heat load) and geometrical parameters (channel size and shape). In order to investigate the effect of these parameters, parallel mini channels were machined onto the copper plate and acetone was used as working fluid to form CLFP-OHP. An attempt has been made to resolve the critical charge ratio of acetone for CLFP-OHP. The measured thermal resistance found strongly dependent on operational and geometrical parameters. The best performance was observed by acetone with a charge ratio of 60% in the vertical orientation for square (2 x 2 mm2) channels. The lowest thermal resistance of 0.39°C/W achieved for acetone at 100 W. The thermal conductivity of CLFP-OHP reached to 3205 W/m °C.

中文翻译:

闭环平板振荡热管热性能实验研究

摘要 在过去的几十年里,已经对闭环平板振荡热管(CLFP-OHP)进行了大量的理论研究和实验研究。然而,由于 CLFP-OHP 的工作机制复杂,操作和几何参数对 CLFP-OHP 热性能的影响迄今尚未完全揭示。在本研究中,CLFP-OHP 用不同的操作参数(电荷比、方向和热负荷)和几何参数(通道尺寸和形状)进行了研究。为了研究这些参数的影响,在铜板上加工了平行的微型通道,并使用丙酮作为工作流体以形成 CLFP-OHP。已尝试解决 CLFP-OHP 丙酮的临界电荷比。测得的热阻强烈依赖于操作和几何参数。对于方形 (2 x 2 mm2) 通道,在垂直方向上电荷比为 60% 的丙酮观察到最佳性能。丙酮在 100 W 时的最低热阻为 0.39°C/W。CLFP-OHP 的热导率达到 3205 W/m °C。
更新日期:2020-01-23
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