Conjugate Heat Transfer Analysis of the Supercritical CO2 Based Counter Flow Compact 3D Heat Exchangers

Janhavi Chitale, Abas Abdoli, George S. Dulikravich, Adrian S. Sabau, James B. Black

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

Compact heat exchangers using supercritical fluids such as CO2 are preferred due to their high heat transfer capacity and smaller footprint. Three-dimensional conjugate forced convection heat transfer analysis was performed on several shell-and-tube counter-flow microchannel heat exchangers. Numerical simulations were conducted to test effect of change in mass flow rate, hydraulic diameter and various cross sections on the heat transfer. Increasing mass flow rate improved heat transfer up to a maximum value and then decreased downstream with increasing turbulence. Maximum heat transfer was obtained for the micro channel with the smallest hydraulic diameter. Amongst the cross sections analyzed (circular, square, circular with radial ribs, and square with radial ribs), the most uniform distribution of temperature and maximum heat transfer were obtained for circular cross section with radial ribs. An optimally efficient operation of such a heat exchanger can be attained by considering these factors during multi-objective constrained optimization of geometric parameters and requirements for additive manufacturing of such compact heat exchangers.

Original languageEnglish
Title of host publicationProceedings of the 19th InterSociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, ITherm 2020
PublisherIEEE Computer Society
Pages23-29
Number of pages7
ISBN (Electronic)9781728197647
DOIs
StatePublished - Jul 2020
Event19th InterSociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, ITherm 2020 - Virtual, Orlando, United States
Duration: Jul 21 2020Jul 23 2020

Publication series

NameInterSociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, ITHERM
Volume2020-July
ISSN (Print)1936-3958

Conference

Conference19th InterSociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, ITherm 2020
Country/TerritoryUnited States
CityVirtual, Orlando
Period07/21/2007/23/20

Funding

Notice: This manuscript has been authored in part by UT-Batelle, LLC under contract DE-AC05-00OR22725 with the United States Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, This work was funded at FIU by the DOE/ORNL contract to TKelvin Corp and supervised by Dr. Adrian Sabau. The effort at UT-Battelle, LLC, was conducted under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy for the project “Novel Recuperator Concepts for Supercritical CO2 based on Additive Manufacturing” funded by the DOE Office of Energy Efficiency and Renewable Energy.

Keywords

  • conjugate heat transfer
  • cooling process
  • heat exchanger
  • micro channel
  • nuclear application
  • pressure drop
  • supercritical CO

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