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Title: Experimental study of the heat transfer characteristics of a two-phase double-loop thermosyphon

Abstract

This paper presents an experimental study for the heat transfer characteristics of a rectangular two- phase, double-loop thermosyphon with water-steam as the working fluid. The evaporator was installed in the middle branch and shared by the two condensors. Local temperature measurements of the core fluid and the wall were made, and the overall heat transfer coefficients of the evaporator, the condensors, and the loop system were obtained and correlated in terms of the fluid properties, heat flux conditions, and the liquid charge level V{sup +}. Results show that the overall heat transfer coefficients increase with decreasing V{sup +} and increasing heat flux. The heat transfer performance of the entire system can be viewed as a parallel combination of the thermal resistances of the evaporator and two condensors. Results also confirm the previous findings that if the liquid charge level is below the fractional volume of the bottom connecting tubes, an overheat phenomenon will take place.

Authors:
; ;  [1]
  1. Dept. of Mechanical Engineering, National Sun Yat-Sen Univ., Kaoshiung (TW)
Publication Date:
OSTI Identifier:
5041696
Resource Type:
Journal Article
Journal Name:
Experimental Heat Transfer; (United States)
Additional Journal Information:
Journal Volume: 4:2; Journal ID: ISSN 0891-6152
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; THERMOSYPHONS; HEAT TRANSFER; EVAPORATORS; HEAT FLUX; STEAM; THERMODYNAMICS; WATER; ENERGY TRANSFER; HYDROGEN COMPOUNDS; OXYGEN COMPOUNDS; 420400* - Engineering- Heat Transfer & Fluid Flow

Citation Formats

Chen, K S, Tsai, S T, and Yu, W T. Experimental study of the heat transfer characteristics of a two-phase double-loop thermosyphon. United States: N. p., 1991. Web. doi:10.1080/08916159108946412.
Chen, K S, Tsai, S T, & Yu, W T. Experimental study of the heat transfer characteristics of a two-phase double-loop thermosyphon. United States. https://doi.org/10.1080/08916159108946412
Chen, K S, Tsai, S T, and Yu, W T. Tue . "Experimental study of the heat transfer characteristics of a two-phase double-loop thermosyphon". United States. https://doi.org/10.1080/08916159108946412.
@article{osti_5041696,
title = {Experimental study of the heat transfer characteristics of a two-phase double-loop thermosyphon},
author = {Chen, K S and Tsai, S T and Yu, W T},
abstractNote = {This paper presents an experimental study for the heat transfer characteristics of a rectangular two- phase, double-loop thermosyphon with water-steam as the working fluid. The evaporator was installed in the middle branch and shared by the two condensors. Local temperature measurements of the core fluid and the wall were made, and the overall heat transfer coefficients of the evaporator, the condensors, and the loop system were obtained and correlated in terms of the fluid properties, heat flux conditions, and the liquid charge level V{sup +}. Results show that the overall heat transfer coefficients increase with decreasing V{sup +} and increasing heat flux. The heat transfer performance of the entire system can be viewed as a parallel combination of the thermal resistances of the evaporator and two condensors. Results also confirm the previous findings that if the liquid charge level is below the fractional volume of the bottom connecting tubes, an overheat phenomenon will take place.},
doi = {10.1080/08916159108946412},
url = {https://www.osti.gov/biblio/5041696}, journal = {Experimental Heat Transfer; (United States)},
issn = {0891-6152},
number = ,
volume = 4:2,
place = {United States},
year = {1991},
month = {1}
}