Effect of Joule-Thomson pressure drop on a cryogenic three fluid heat exchanger with two communications

Chodankar, Vishnudas Alias Vipul L.; Aswatha,; Krishna, V.; Seetharamu, K.N.

doi:10.1016/j.cryogenics.2020.103046

Cited by 2 publications

(9 citation statements)

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“…His model presented results for the JT pressure drop. The validation of the present model with Chodankar et al (2020) shows a good match, as shown in Figure 2(b). Hence, the model is validated and now we can confidently take up further investigations.…”

Section: Resultssupporting

confidence: 61%

“…The effectiveness is calculated from the output temperature of hot fluid, which results in є = 0.48 for the present code, and for Quadir et al (2013) study, it is є = 0.47, which gives a good match. For the second validation, we consider a numerical model designed by Chodankar et al (2020). His model presented results for the JT pressure drop.…”

Section: Resultsmentioning

confidence: 99%

“…The studies conducted on the three-fluid-two-communication HX with JT pressure drop (Chodankar et al , 2020) expressed heat transfer, in terms of enthalpy change. The enthalpy change is given in equation (1) by using Maxwell’s relation, where heat transfer is expressed in terms of both the temperature difference and pressure difference.…”

Section: Mathematical Modelmentioning

confidence: 99%

“…Veerabhdrappa et al (2017) extended the research with heat-in-leak and concluded that the transient effects on cold fluid are more significant than the intermediate fluid. Chodankar et al (2020) studied JT pressure drop on a three-stream-three-contact HX and presented the results for a singular value of JT pressure drop. The present study presents a wide range of JT pressure drop, presenting improved effectiveness with higher values of JT pressure drop.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced effectiveness with positive Joule–Thomson pressure drop effects on a cryogenic heat exchanger with three fluid-two communications

Chodankar¹,

Aswatha²,

Seetharamu³

2021

HFF

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Purpose The purpose of this paper is to attain higher effectiveness with an introduction of Joule–Thomson effect on a three-fluid heat exchanger with two communications. It also gives a range of parameter values that have to be maintained for achieving effectiveness above 0.85. Attaining effectiveness above 0.85 is very important for the heat exchanger to perform the liquefaction of hot fluid. Design/methodology/approach The analysis is conducted using Galerkin’s method, a finite element approach. Findings This investigation determines crucial values for the cryogenic heat exchanger to achieve effectiveness above 0.85. The important findings are as follows: effectiveness above 0.85 is attained if the heat exchanger size is within the range of 8–10; ratio of heat flow resistance between intermediate and hot stream to heat flow resistance between cold and hot stream should be maintained between 1 and 10; the intermediate fluid temperature should be maintained between 0 and 0.2; the ratio of thermal capacity of the hot fluid relative to a cold fluid should be maintained between 1.25 and 1.42; and the ratio of thermal capacity of the hot fluid relative to an intermediate fluid should be maintained between 2 and 2.5. Research limitations/implications The investigation has presented a finding for improving the effectiveness of the cryogenic heat exchanger. Higher the Joule–Thomson pressure drop effect, more is the drop in temperature of the fluid resulting in additional cooling or lowering of the fluid temperature. The practical implementation is also explained, i.e. to achieve practically the Joule–Thomson pressure drop in a cryogenic heat exchanger. Originality/value To the best of the authors’ knowledge, no investigations were carried out previously on Joule–Thomson investigation on a three-fluid heat exchanger with two communications, for different values of Joule–Thomson pressure drop.

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Section: Resultssupporting

confidence: 61%

Section: Resultsmentioning

confidence: 99%

Section: Mathematical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Enhanced effectiveness with positive Joule–Thomson pressure drop effects on a cryogenic heat exchanger with three fluid-two communications

Chodankar¹,

Aswatha²,

Seetharamu³

2021

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“…They considered different refrigeration components and the charge composition of mixtures for the study. Vishnudas et al 24 investigated the JT effect on a three-fluid-two communication HX and concluded that the positive JT effect results in higher values of effectiveness and the negative JT effect results in lower values of effectiveness. Vishnudas et al 25 investigated the JT effect on a three-stream-three contact HX considering only for H 1 parameter.…”

Section: Introductionmentioning

confidence: 99%

Joule–Thomson effect investigations on a cryogenic three‐fluid–three thermal communication heat exchanger

Chodankar¹,

Aswatha

Krishna

et al. 2021

Heat Trans

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The present study investigates the Joule-Thomson (JT) effect due to pressure drop on three-fluid heat exchangers (HXs) with three thermal communications. The increased miniaturization of cryogenic HXs has led to the introduction of the JT effect. The present study investigates JT effects on a three-fluid HX with three communications presenting different JT effects, which leads to a rise or drop in effectiveness values. The study is carried out using finite element analysis and MATLAB, considering seven nondimensional parameters of which one is JT pressure drop. The highest effectiveness is achieved for the positive JT effect at the hot stream. This improved effectiveness at hot fluid is achieved by maintaining the size (number of transfer units) of the HX more than 3.1, along with the ratio of the cold fluid heat capacity to the hot fluid heat capacity above 0.8 and the intermediate fluid temperature above 0.7.

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Effect of Joule-Thomson pressure drop on a cryogenic three fluid heat exchanger with two communications

Cited by 2 publications

References 8 publications

Enhanced effectiveness with positive Joule–Thomson pressure drop effects on a cryogenic heat exchanger with three fluid-two communications

Enhanced effectiveness with positive Joule–Thomson pressure drop effects on a cryogenic heat exchanger with three fluid-two communications

Joule–Thomson effect investigations on a cryogenic three‐fluid–three thermal communication heat exchanger

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