A Correlation for Forced Convective Boiling Heat Transfer of Single-Component Refrigerants in a Horizontal Smooth Tube

Autor:	Satoru Momoki, Tetsu Fujii, Hiroshi Takamatsu
Rok vydání:	1992
Předmět:	Physics::Fluid Dynamics Convection Materials science Heat flux Convective heat transfer Critical heat flux Mechanical Engineering Heat transfer Thermodynamics Heat transfer coefficient Condensed Matter Physics Nucleate boiling Forced convection
Zdroj:	TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B. 58:1875-1882
ISSN:	1884-8346 0387-5016
DOI:	10.1299/kikaib.58.1875
Popis:	An experimental study is reported on convective boiling heat transfer for HFC134a, HCFC22, CFC114 and CFC12 inside a horizontal smooth tube. The test evaporator is of the double-tube type in which the heating water flows in the outer annulus, and the local heat transfer coefficients are measured for both counter and parallel flow. Based on the supposition of Chen that the total heat flux q is represented as the sum of forced convective contribution qcv and nucleate boiling contribution qnb, a general correlation is developed for the data in the annular flow regime. The mean deviation between the calculated and measured heat transfer coefficients is 12.2% for the present experimental data and 9.5% for available data collected from previous research. According to the proposed correlation, nucleate boiling is not suppressed even in the high-quality region in the case of counter flow, while two-phase forced convection has been recognized as predominant in the high-quality region with uniform heat flux conditions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8ed47a4097aa1411de6691e5991e7c1a https://doi.org/10.1299/kikaib.58.1875 Zobrazit plný text záznamu