Equivalent time for interrupted tests on borehole heat exchangers.(Report): An article from: HVAC & R Research

This digital document is an article from HVAC & R Research, published by American Society of Heating, Refrigerating, and Air-Conditioning Engineers, Inc. on May 1, 2008. The length of the article is 8055 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available immediately after purchase. You can view it with any web browser.

From the author: Thermal tests are often performed on vertical boreholes for ground-source heat pump systems, which heat and cool buildings. These in-situ tests estimate soil thermal conductivity, which is an important parameter in the design of these systems. If an electrical power loss or other equipment failure interrupts the test, the interruption greatly complicates the analysis of the test data. This paper presents an equivalent-time method to remove the effects of the interruption and estimate soil thermal conductivity, along with borehole resistance. By using this method and restarting the test immediately after the power is restored, one can save time and money compared with waiting for the initial heat pulse to dissipate before restarting. The method is verified with test data sets from a large laboratory sandbox.

Citation Details
Title: Equivalent time for interrupted tests on borehole heat exchangers.(Report)
Author: Richard A. Beier
Publication:HVAC & R Research (Magazine/Journal)
Date: May 1, 2008
Publisher: American Society of Heating, Refrigerating, and Air-Conditioning Engineers, Inc.
Volume: 14 Issue: 3 Page: 489(17)

Article Type: Report

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