Correlation to Predict the Maximum Heat Flux of a Vertical Closed-Loop Pulsating Heat Pipe

Autor:	Pradit Terdtoon, Niti Kammuang-lue, Phrut Sakulchangsatjatai, D. Joseph Mook
Rok vydání:	2009
Předmět:	Fluid Flow and Transfer Processes Materials science Countercurrent exchange Critical heat flux Mechanical Engineering Thermodynamics Mechanics Heat transfer coefficient Condensed Matter Physics Slug flow Physics::Fluid Dynamics Heat pipe Heat flux Nucleate boiling Evaporator
Zdroj:	Heat Transfer Engineering. 30:961-972
ISSN:	1521-0537 0145-7632
DOI:	10.1080/01457630902837442
Popis:	The objective of this study is to experimentally investigate the effect of various parameters on the maximum heat flux of a vertical closed-loop pulsating heat pipe (CLPHP) and the inside phenomena that cause maximum heat flux to occur. A correlation to predict the maximum heat flux using the obtained results was also established. Quantitative and qualitative experiments were conducted and analyzed. A copper CLPHP and a transparent high-temperature glass capillary tube CLPHP were used in the quantitative and qualitative experiments. From the study, it was found that when the internal diameter and number of meandering turns increased, the maximum heat flux increased. However, when the evaporator section length increased, the maximum heat flux decreased. The maximum heat flux of a CLPHP occurs due to the dry-out of liquid film at the evaporator section. This occurs after a two-phase working fluid circulation changes flow pattern from countercurrent slug flow to co-current annular flow, because the vapor vel...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5043b2eb40366a769abbc5bd51cd6b42 https://doi.org/10.1080/01457630902837442 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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