Title: | Influence of Macroscopic Heat Flow Constrictions on the Performance of FinlTube Heat Exchangers |
Author(s): | McGill, R.O. |
Contributor(s): | Clausing, A.M. |
Subject(s): | insulation systems |
Abstract: | An investigation of the influences of macroscopic constrictions on the thennal performance of
plate-fin heat exchangers is described in this report. Parametric studies cover parameter ranges that
are typical of the evaporators used in household refrigerators. Exhaustive numerical investigations
are presented that show the influences of: (i) the macroscopic contact geometry-the contact
between the plate fin and the tube, (ii) the fm parameter-a dimensionless group that governs the
fin efficiency, (iii) the fm geometry, (iv) the interstitial conductance, (v) the constriction alleviation
caused by the shunting of a part of the heat flow through the frost buildup around the base of the
fin, and (v) the effect of fins with collars--an enlarged apparent contact area at the fin/tube
interface. Dimensionless parameters and the physical significance of these parameters are deduced
that govern the thermal performance of fins with and without constrictions in the heat flow path. |
Issue Date: | 1994-07 |
Publisher: | Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign. |
Series/Report: | Air Conditioning and Refrigeration Center TR-64 |
Genre: | Technical Report |
Type: | Text |
Language: | English |
URI: | http://hdl.handle.net/2142/10767 |
Sponsor: | Air Conditioning and Refrigeration Center Project 19 |
Date Available in IDEALS: | 2009-04-13 |
Identifier in Online Catalog: | 3723983 |