Experimental Study on Heat Transfer Performance of the High Temperature Heat Pipe With a Large Length-diameter Ratio
In the field of active thermal utilization of nuclear energy,high temperature heat pipes(HTHPs)need to have a large length and ensure superior temperature uniformity.However,the existing research focuses on theoretical prediction of the performance and preparation of the HTHP with a relatively short length.In this paper,the HTHP with the length-diameter ratio of 67 is first prepared,the frozen start-up characteristic is theoretically analyzed,and the frozen start-up and steady heat transfer performance are experimentally studied,and a heating method that could give full play to the excellent heat transfer performance of the HTHP with a large length-diameter ratio is proposed.The HTHP with the length-diameter ratio of 200 is further prepared,and its heat transfer performance is qualitatively verified.The frozen start-up process is investigated by quantitative experiments,and the heat transfer law in the laryngeal region of the super-long HTHP is found.
high temperature heat pipelarge length-diameter ratiofrozen start-upactive heat transfer
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