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Title: Fundamental study of key issues related to advanced sCO 2 Brayton cycle: Prototypic HX development and cavitation

Abstract

Diffusion bonded heat exchangers are the leading candidates for the sCO 2 Brayton cycles in next generation nuclear power plants. Commercially available diffusion bonded heat exchangers utilize set of continuous semi-circular zigzag micro channels to increase the heat transfer area and enhance heat transfer through increased turbulence production. Such heat exchangers can lead to excessive pressure drop as well as flow maldistribution in the case of poorly designed flow distribution headers. The goal of the current project is to fabricate and test potential discontinuous fin patterns for diffusion bonded heat exchangers; which can achieve desired thermal performance at lower pressure drops. Prototypic discontinuous offset rectangular and Airfoil fin surface geometries were chemically etched on to 316 stainless steel plate and sealed against an un-etched flat pate using O-ring seal emulating diffusion bonded heat exchangers. Thermal-hydraulic performance of these prototypic discontinuous fin geometries was experimentally evaluated and compared to the existing data for the continuous zigzag channels. The data generated from this project will serve as the database for future testing and validation of numerical models.

Authors:
 [1]
  1. Georgia Inst. of Technology, Atlanta, GA (United States)
Publication Date:
Research Org.:
Georgia Inst. of Technology, Atlanta, GA (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
1417033
Report Number(s):
14-6670
14-6670
DOE Contract Number:
NE0008299
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS

Citation Formats

Ranjan, Devesh. Fundamental study of key issues related to advanced sCO2 Brayton cycle: Prototypic HX development and cavitation. United States: N. p., 2018. Web. doi:10.2172/1417033.
Ranjan, Devesh. Fundamental study of key issues related to advanced sCO2 Brayton cycle: Prototypic HX development and cavitation. United States. doi:10.2172/1417033.
Ranjan, Devesh. Mon . "Fundamental study of key issues related to advanced sCO2 Brayton cycle: Prototypic HX development and cavitation". United States. doi:10.2172/1417033. https://www.osti.gov/servlets/purl/1417033.
@article{osti_1417033,
title = {Fundamental study of key issues related to advanced sCO2 Brayton cycle: Prototypic HX development and cavitation},
author = {Ranjan, Devesh},
abstractNote = {Diffusion bonded heat exchangers are the leading candidates for the sCO2 Brayton cycles in next generation nuclear power plants. Commercially available diffusion bonded heat exchangers utilize set of continuous semi-circular zigzag micro channels to increase the heat transfer area and enhance heat transfer through increased turbulence production. Such heat exchangers can lead to excessive pressure drop as well as flow maldistribution in the case of poorly designed flow distribution headers. The goal of the current project is to fabricate and test potential discontinuous fin patterns for diffusion bonded heat exchangers; which can achieve desired thermal performance at lower pressure drops. Prototypic discontinuous offset rectangular and Airfoil fin surface geometries were chemically etched on to 316 stainless steel plate and sealed against an un-etched flat pate using O-ring seal emulating diffusion bonded heat exchangers. Thermal-hydraulic performance of these prototypic discontinuous fin geometries was experimentally evaluated and compared to the existing data for the continuous zigzag channels. The data generated from this project will serve as the database for future testing and validation of numerical models.},
doi = {10.2172/1417033},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 08 00:00:00 EST 2018},
month = {Mon Jan 08 00:00:00 EST 2018}
}

Technical Report:

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