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Title: Microchannel crossflow fluid heat exchanger and method for its fabrication

Abstract

A microchannel crossflow fluid heat exchanger and a method for its fabrication are disclosed. The heat exchanger is formed from a stack of thin metal sheets which are bonded together. The stack consists of alternating slotted and unslotted sheets. Each of the slotted sheets includes multiple parallel slots which form fluid flow channels when sandwiched between the unslotted sheets. Successive slotted sheets in the stack are rotated ninety degrees with respect to one another so as to form two sets of orthogonally extending fluid flow channels which are arranged in a crossflow configuration. The heat exchanger has a high surface to volume ratio, a small dead volume, a high heat transfer coefficient, and is suitable for use with fluids under high pressures. The heat exchanger has particular application in a Stirling engine that utilizes a liquid as the working substance.

Inventors:
 [1];  [2];  [1]
  1. Los Alamos, NM
  2. Santa Fe, NM
Publication Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM
OSTI Identifier:
865451
Patent Number(s):
US 4516632
Assignee:
United States of America as represented by United States (Washington, DC)
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
microchannel; crossflow; fluid; heat; exchanger; method; fabrication; disclosed; formed; stack; metal; sheets; bonded; consists; alternating; slotted; unslotted; multiple; parallel; slots; form; flow; channels; sandwiched; successive; rotated; ninety; degrees; respect; sets; orthogonally; extending; arranged; configuration; surface; volume; ratio; dead; transfer; coefficient; suitable; fluids; pressures; particular; application; stirling; engine; utilizes; liquid; substance; fluid heat; metal sheets; volume ratio; dead volume; particular application; flow channels; flow channel; heat exchange; heat exchanger; heat transfer; fluid flow; metal sheet; stirling engine; multiple parallel; transfer coefficient; microchannel crossflow; flow configuration; extending fluid; flow fluid; crossflow fluid; /165/

Citation Formats

Swift, Gregory W, Migliori, Albert, and Wheatley, John C. Microchannel crossflow fluid heat exchanger and method for its fabrication. United States: N. p., 1985. Web.
Swift, Gregory W, Migliori, Albert, & Wheatley, John C. Microchannel crossflow fluid heat exchanger and method for its fabrication. United States.
Swift, Gregory W, Migliori, Albert, and Wheatley, John C. Tue . "Microchannel crossflow fluid heat exchanger and method for its fabrication". United States. https://www.osti.gov/servlets/purl/865451.
@article{osti_865451,
title = {Microchannel crossflow fluid heat exchanger and method for its fabrication},
author = {Swift, Gregory W and Migliori, Albert and Wheatley, John C},
abstractNote = {A microchannel crossflow fluid heat exchanger and a method for its fabrication are disclosed. The heat exchanger is formed from a stack of thin metal sheets which are bonded together. The stack consists of alternating slotted and unslotted sheets. Each of the slotted sheets includes multiple parallel slots which form fluid flow channels when sandwiched between the unslotted sheets. Successive slotted sheets in the stack are rotated ninety degrees with respect to one another so as to form two sets of orthogonally extending fluid flow channels which are arranged in a crossflow configuration. The heat exchanger has a high surface to volume ratio, a small dead volume, a high heat transfer coefficient, and is suitable for use with fluids under high pressures. The heat exchanger has particular application in a Stirling engine that utilizes a liquid as the working substance.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1985},
month = {1}
}

Patent:

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