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Performance evaluation of heat exchanger for mixed refrigerant J-T cryocooler

DSpace at IIT Bombay

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Title Performance evaluation of heat exchanger for mixed refrigerant J-T cryocooler
 
Creator ARDHAPURKAR, PM
SRIDHARAN, A
ATREY, MD
 
Subject Mixed refrigerant
J-T cryocooler
Heat transfer coefficient
Heat exchanger
Condensation
JOULE-THOMSON CRYOCOOLER
GENERAL CORRELATION
CRYOGENIC TEMPERATURES
TRANSFER COEFFICIENT
CONDENSATION
TUBES
MIXTURES
SMOOTH
FLOW
 
Description In mixed refrigerant Joule-Thomson cryocooler, a multi-component mixture of nitrogen-hydrocarbons undergoes evaporation and condensation process in a helical coiled heat exchanger simultaneously at different pressures. Experimental data and empirical correlations for predicting heat transfer coefficients of evaporating and condensing streams of multi-component mixtures at cryogenic temperatures are unavailable. As a result, design of these heat exchangers is a challenging task. The present work aims to address this challenge. It assesses the existing condensation correlations against the calculated data obtained during experimentation. Experiments are conducted to determine overall heat transfer coefficients along the length of the heat exchanger for various mixtures. The paper studies the applicability of these correlations to the multi-component mixtures at cryogenic temperatures. (C) 2014 Elsevier Ltd. All rights reserved.
 
Publisher ELSEVIER SCI LTD
 
Date 2014-12-28T17:53:59Z
2014-12-28T17:53:59Z
2014
 
Type Article
 
Identifier CRYOGENICS, 6349-56
0011-2275
1879-2235
http://dx.doi.org/10.1016/j.cryogenics.2014.06.012
http://dspace.library.iitb.ac.in/jspui/handle/100/17040
 
Language English