Selection of Heat Transfer Enhancement Technique for Compact Mini and Micro Heat Exchangers Design

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F26%3A0201001" target="_blank" >RIV/00216305:26210/26:0201001 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.scopus.com/pages/publications/105023153876?origin=resultslist" target="_blank" >https://www.scopus.com/pages/publications/105023153876?origin=resultslist</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3303/CET25120080" target="_blank" >10.3303/CET25120080</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Selection of Heat Transfer Enhancement Technique for Compact Mini and Micro Heat Exchangers Design

Popis výsledku v původním jazyce

The need to decrease the sizes and masses of heat exchangers while preserving their performance has stipulated the development of compact heat exchangers with mini and micro channels (MCHE). It is supported by the need for increased recuperation of heat energy, facilitating better energy efficiency with strict limitations for space, material and cost. The adequate substitution of conventional heat exchangers with MCHE requires maintaining the same heat load, not exceeding the allowable pressure losses. The different ways to increase the compactness are analysed, including the change of hydraulic diameter, and the use of various methods of heat transfer intensification by changing the channel geometry and flow structure. The Nusselt numbers and friction factors correlations for plane tubes and criss-cross flow channels of plate heat exchangers are compared. A newer form of the core velocity equation has been developed, which allows comparison of the performance of MCHE heating surfaces with different enhancement techniques in specific process conditions. The results of the calculations illustrate the influence of the channel's hydraulic diameter and length on the MCHE performance for channels with the considered methods of heat transfer intensification. The ways to decrease channel size to mini and micro scales are determined. The recommendations on choosing the best channel geometry and size, depending on specified process conditions and stream nature, are formulated.

Název v anglickém jazyce

Selection of Heat Transfer Enhancement Technique for Compact Mini and Micro Heat Exchangers Design

Popis výsledku anglicky

The need to decrease the sizes and masses of heat exchangers while preserving their performance has stipulated the development of compact heat exchangers with mini and micro channels (MCHE). It is supported by the need for increased recuperation of heat energy, facilitating better energy efficiency with strict limitations for space, material and cost. The adequate substitution of conventional heat exchangers with MCHE requires maintaining the same heat load, not exceeding the allowable pressure losses. The different ways to increase the compactness are analysed, including the change of hydraulic diameter, and the use of various methods of heat transfer intensification by changing the channel geometry and flow structure. The Nusselt numbers and friction factors correlations for plane tubes and criss-cross flow channels of plate heat exchangers are compared. A newer form of the core velocity equation has been developed, which allows comparison of the performance of MCHE heating surfaces with different enhancement techniques in specific process conditions. The results of the calculations illustrate the influence of the channel's hydraulic diameter and length on the MCHE performance for channels with the considered methods of heat transfer intensification. The ways to decrease channel size to mini and micro scales are determined. The recommendations on choosing the best channel geometry and size, depending on specified process conditions and stream nature, are formulated.

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

—

OECD FORD obor

20301 - Mechanical engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Chemical Engineering transactions

ISSN

—

e-ISSN

2283-9216

Svazek periodika

120

Číslo periodika v rámci svazku

OKTOBER

Stát vydavatele periodika

IT - Italská republika

Počet stran výsledku

6

Strana od-do

475-480

Kód UT WoS článku

—

EID výsledku v databázi Scopus

2-s2.0-105023153876