完整後設資料紀錄
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dc.contributor.authorHung, Jung-Tsungen_US
dc.contributor.authorChen, Yu-Kaien_US
dc.contributor.authorShih, Hou-Kuangen_US
dc.contributor.authorWang, Chi-Chuanen_US
dc.date.accessioned2020-10-05T02:01:53Z-
dc.date.available2020-10-05T02:01:53Z-
dc.date.issued2020-10-01en_US
dc.identifier.issn0017-9310en_US
dc.identifier.urihttp://dx.doi.org/10.1016/j.ijheatmasstransfer.2020.120092en_US
dc.identifier.urihttp://hdl.handle.net/11536/155313-
dc.description.abstractThe present study proposes a rationally based model to investigate the influence of lubricant on the nucleate boiling characteristics of refrigerant-lubricant mixtures. This model is developed based on site-activation boiling mechanism along with detailed physical parameters in association with thermal and hydrodynamic processes, including waiting period for bubble incipience, bubble growth and departure period. Yet, the model also encompasses the polymer adsorption theory and energy gap concept to address the effect of lubricant with different chemical structure and physical property on the heat transfer phenomenon during each period of nucleate boiling individually. In addition, by using the partition function with Boltzmann energy distribution in different energy state, bubble density can be expressed in an analytic form to facilitate the calculation of heat transfer coefficient. Based on the proposed model, the presence of lubricant appreciably changes interfacial energy upon metal-liquid and liquid-bubble interfaces. The lubricant prefers lying on metal surface, thereby influencing surface coverage concentration when bubble is initiating. Such lubricant-rich layer near metal surface significantly alters the waiting period of nucleate boiling process, bubble size, growth and departure time, bubble density and superheat on heating surface. In essence, the presence of lubricant dramatically influences heat transfer performance. The proposed model is validated against some recent test data for R-134a/POE, R-1234ze/POE and R-134a/PVE refrigerant/lubricants mixtures. (C) 2020 Elsevier Ltd. All rights reserved.en_US
dc.language.isoen_USen_US
dc.subjectHeat transfer coefficienten_US
dc.subjectLubricanten_US
dc.subjectRefrigeranten_US
dc.subjectMixturesen_US
dc.subjectNucleate boilingen_US
dc.subjectMechanistic modelen_US
dc.titleA mechanistic model for nucleate boiling heat transfer performance with lubricant-refrigerant mixtureen_US
dc.typeArticleen_US
dc.identifier.doi10.1016/j.ijheatmasstransfer.2020.120092en_US
dc.identifier.journalINTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFERen_US
dc.citation.volume159en_US
dc.citation.spage0en_US
dc.citation.epage0en_US
dc.contributor.department機械工程學系zh_TW
dc.contributor.departmentDepartment of Mechanical Engineeringen_US
dc.identifier.wosnumberWOS:000560367300036en_US
dc.citation.woscount0en_US
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