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Title: Heat exchanger with transpired, highly porous fins

Abstract

The heat exchanger includes a fin and tube assembly with increased heat transfer surface area positioned within a hollow chamber of a housing to provide effective heat transfer between a gas flowing within the hollow chamber and a fluid flowing in the fin and tube assembly. A fan is included to force a gas, such as air, to flow through the hollow chamber and through the fin and tube assembly. The fin and tube assembly comprises fluid conduits to direct the fluid through the heat exchanger, to prevent mixing with the gas, and to provide a heat transfer surface or pathway between the fluid and the gas. A heat transfer element is provided in the fin and tube assembly to provide extended heat transfer surfaces for the fluid conduits. The heat transfer element is corrugated to form fins between alternating ridges and grooves that define flow channels for directing the gas flow. The fins are fabricated from a thin, heat conductive material containing numerous orifices or pores for transpiring the gas out of the flow channel. The grooves are closed or only partially open so that all or substantially all of the gas is transpired through the fins so thatmore » heat is exchanged on the front and back surfaces of the fins and also within the interior of the orifices, thereby significantly increasing the available the heat transfer surface of the heat exchanger. The transpired fins also increase heat transfer effectiveness of the heat exchanger by increasing the heat transfer coefficient by disrupting boundary layer development on the fins and by establishing other beneficial gas flow patterns, all at desirable pressure drops.« less

Inventors:
 [1];  [2]
  1. Golden, CO
  2. Boulder, CO
Issue Date:
Research Org.:
Midwest Research Institute, Kansas City, MO (United States)
OSTI Identifier:
874378
Patent Number(s):
6378605
Assignee:
Midwest Research Institute (Kansas City, MO)
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F28 - HEAT EXCHANGE IN GENERAL F28F - DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
DOE Contract Number:  
AC36-99GO10337
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
heat; exchanger; transpired; highly; porous; fins; tube; assembly; increased; transfer; surface; positioned; hollow; chamber; housing; provide; effective; gas; flowing; fluid; fan; included; force; air; flow; conduits; direct; prevent; mixing; pathway; element; provided; extended; surfaces; corrugated; form; alternating; ridges; grooves; define; channels; directing; fabricated; conductive; material; containing; numerous; orifices; pores; transpiring; channel; closed; partially; substantially; exchanged; front; interior; significantly; increasing; available; increase; effectiveness; coefficient; disrupting; boundary; layer; establishing; beneficial; patterns; desirable; pressure; drops; heat exchanger; heat transfer; fluid flow; gas flow; conductive material; tube assembly; highly porous; increased heat; /165/

Citation Formats

Kutscher, Charles F, and Gawlik, Keith. Heat exchanger with transpired, highly porous fins. United States: N. p., 2002. Web.
Kutscher, Charles F, & Gawlik, Keith. Heat exchanger with transpired, highly porous fins. United States.
Kutscher, Charles F, and Gawlik, Keith. Tue . "Heat exchanger with transpired, highly porous fins". United States. https://www.osti.gov/servlets/purl/874378.
@article{osti_874378,
title = {Heat exchanger with transpired, highly porous fins},
author = {Kutscher, Charles F and Gawlik, Keith},
abstractNote = {The heat exchanger includes a fin and tube assembly with increased heat transfer surface area positioned within a hollow chamber of a housing to provide effective heat transfer between a gas flowing within the hollow chamber and a fluid flowing in the fin and tube assembly. A fan is included to force a gas, such as air, to flow through the hollow chamber and through the fin and tube assembly. The fin and tube assembly comprises fluid conduits to direct the fluid through the heat exchanger, to prevent mixing with the gas, and to provide a heat transfer surface or pathway between the fluid and the gas. A heat transfer element is provided in the fin and tube assembly to provide extended heat transfer surfaces for the fluid conduits. The heat transfer element is corrugated to form fins between alternating ridges and grooves that define flow channels for directing the gas flow. The fins are fabricated from a thin, heat conductive material containing numerous orifices or pores for transpiring the gas out of the flow channel. The grooves are closed or only partially open so that all or substantially all of the gas is transpired through the fins so that heat is exchanged on the front and back surfaces of the fins and also within the interior of the orifices, thereby significantly increasing the available the heat transfer surface of the heat exchanger. The transpired fins also increase heat transfer effectiveness of the heat exchanger by increasing the heat transfer coefficient by disrupting boundary layer development on the fins and by establishing other beneficial gas flow patterns, all at desirable pressure drops.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}

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