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RESEARCH PAPERS

Parametric Analysis of Horizontal Air and Liquid Earth Loops

[+] Author and Article Information
Donell P. Froehlich

College of Engineering, South Dakota State University, Brookings, SD 57007

Barbara J. Glawe

Caterpillar, Inc., Peoria, IL

J. Sol. Energy Eng 113(2), 123-128 (May 01, 1991) (6 pages) doi:10.1115/1.2929956 History: Received October 23, 1989; Revised December 03, 1990; Online June 06, 2008

Abstract

Equations and parameter characteristics were examined for both closed and open-earth loops. Analysis and graphs are presented on the heat exchange effectiveness of air and liquid earth loops and how the heat transfer is affected by major parameters such as: pipe diameter, soil thermal conductivity, fluid velocity, and fluid type. The open loop will produce more heat per unit length of pipe while the closed produces more total system heat. However, final loop selection is based on many factors that are both site and system specific.

Copyright © 1991 by The American Society of Mechanical Engineers
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