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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

EXPERIMENTAL STUDY ON THERMAL PERFORMANCE OF A NEW NOVEL LOOP HEAT PIPE

Get access (open in a dialog) DOI: 10.1615/IHTC16.bae.022678
pages 1309-1316

Аннотация

Prior to this study, our group first proposed a novel loop heat pipe (denoted as NLHP) with a flat evaporator and a boiling pool. In order to evaluate the effects of relative position of the compensation chamber and evaporator and the fluid pipe length on the thermal performance of loop system, two changes were made to NLHP to create a new system (denoted as NNLHP). One was to invert the relative position of the evaporator and compensation chamber which was previously located above the evaporator. The other was to shorten the length of first vapor line by 100 mm. In our study, the startup and operating characteristics of NNLHP were compared with NLHP. The results show that the startup time and temperature overshoot of two systems both decrease with the increase of boiling pool heat loads. Both systems can start up smoothly within some certain time differences while NNLHP has a wider range of time differences. At a liquid charging ratio of 65%, NNLHP has the wildest range of startup heat loads, and at the same heat load, the operating temperature of its boiling pool is higher than that of NLHP. The critical heat flux of NNLHP is 28.9 W/cm2, and its thermal resistance decreases with the increased boiling pool heat loads.