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<p>In this paper, an experimental study is presented to investigate the start-up and quasi-steady operation characteristics of a loop pulsating heat pipe (LPHP). The effects of the localized start-up of the LPHP, along with the communication pipe, on the overall start-up process are analyzed, considering the temperature oscillations. In this regard, the temperature oscillations of each channel during the quasi-steady operation are analyzed to characterize and highlight the effects of different LPHP structural parts on the process. The results showed that there is a localized start-up process when employing the side-heating arrangement. Under this arrangement, the start-up time and average temperature at start-up are significantly reduced compared to the three other arrangements. Overall, using a side-heating arrangement, along with the periodic temperature oscillations in the quasi-steady state stage and the multiple quasi-steady state phenomena makes the LPHP withstand higher heat input loads.</p>

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Start-up and quasi-steady operation characteristics of a loop pulsating heat pipe with multiple bends

  • 期刊论文

  • 发表日期：

    2025年1月6日

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  • Shilong Fan,
  • Fumin Shang,
  • Zhiming Xu,
  • Zhimin Han

摘要

In this paper, an experimental study is presented to investigate the start-up and quasi-steady operation characteristics of a loop pulsating heat pipe (LPHP). The effects of the localized start-up of the LPHP, along with the communication pipe, on the overall start-up process are analyzed, considering the temperature oscillations. In this regard, the temperature oscillations of each channel during the quasi-steady operation are analyzed to characterize and highlight the effects of different LPHP structural parts on the process. The results showed that there is a localized start-up process when employing the side-heating arrangement. Under this arrangement, the start-up time and average temperature at start-up are significantly reduced compared to the three other arrangements. Overall, using a side-heating arrangement, along with the periodic temperature oscillations in the quasi-steady state stage and the multiple quasi-steady state phenomena makes the LPHP withstand higher heat input loads.