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Thermal Foundation Benefits and Efficiency

[+] Author Affiliations
Youssef Aoun

Automation and Green Energy, Beirut, Lebanon

Maya Kadi

Energy Environmental Corporation, Denver, CO

Charbel Bou-Mosleh

Notre Dame University-Louaize, Zouk Mosbeh, Lebanon

Paper No. IMECE2017-71359, pp. V006T08A090; 8 pages
doi:10.1115/IMECE2017-71359
From:
  • ASME 2017 International Mechanical Engineering Congress and Exposition
  • Volume 6: Energy
  • Tampa, Florida, USA, November 3–9, 2017
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5841-7
  • Copyright © 2017 by ASME

abstract

In this paper, a novel type of ground heat exchanger for geothermal applications is introduced. This heat exchanger is installed in the foundations of a commercial and residential building that has piles and diaphragm walls. This dramatically reduces the cost of the ground heat exchanger and makes the application more cost efficient with a payback period of 1–2 years compared to 10 years with the conventional vertical loops. The system will be detailed and its basic operation will be explained. In addition, test results of an in-situ thermal test response of a loop that is already installed in a foundation of a building in Beirut, Lebanon will also be presented. This test allows the approximation of the thermal conductivity of the ground and the amount of heat that is absorbed and extracted from and to the ground. The preliminary tests have given very promising results, since the ground is water dense and has a high thermal conductivity which increases the heat transfer between our heat exchanger installed in the foundation and the ground. In addition, in the current application, and around the foundation, there exists a lot of circulating water. This renders the application more and more efficient since the ground temperature will not fluctuate in the next 10 years.

Copyright © 2017 by ASME

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