Design and Construction of a Condensation Heat Transfer Experimental Facility for Use with Microchannel Condenser Tubing

Andres, D.J.

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https://hdl.handle.net/2142/10769 Copy

Description

Title

Design and Construction of a Condensation Heat Transfer Experimental Facility for Use with Microchannel Condenser Tubing

Author(s)

Andres, D.J.

Contributor(s)

Dunn, W.E.

Issue Date

1994-09

Keyword(s)

• parallel flow
• microchannel condensers

Abstract

Microchannel tubing is a relatively new heat-exchanger technology which involves internal heat transfer enhancements. Although microchannel technology offers tremendous design flexibility, it is not well understood. As part of a project that also inculdes full-condenser modeling and single-port flow modeling, a single-tube experimental facility has been built to evaluate the heat transfer performance characteristics of microchannel tubes using pure refrigerant 134a with air in crossflow. The facility achieves energy balance between air and refrigerant heat transfer rates within ±3%, but two-phase data are presently not attainable. A brief review of heat transfer coefficient correlations is given to illustrate a few typical results. The design and construction of the facility is explained in detail, emphasizing the air loop. Subcooled, superheated, and two-phase data are collected for various microchannel port geometries, and data reduction techniques and theory are explained. Although energy balance data are presented in this paper, only proprietary heat transfer coefficients have been obtained thus far, and the facility is presently taking data for the publication of non-proprietary heat transfer coefficients.

Publisher

Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign.

Series/Report Name or Number

Air Conditioning and Refrigeration Center TR-66

Type of Resource

text

Language

en

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http://hdl.handle.net/2142/10769

Sponsor(s)/Grant Number(s)

Air Conditioning and Refrigeration Center Project 25

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