Thermohydraulic Analysis of Ground as a Heat Source for Heat Pumps Using Vertical Pipes

[+] Author and Article Information
M. T. Kangas

Department of Technical Physics, Helsinki University of Technology, FIN-02150 Espoo, Finland Fax: +358-9-4513195

J. Energy Resour. Technol 118(4), 300-305 (Dec 01, 1996) (6 pages) doi:10.1115/1.2793877 History: Received December 04, 1995; Revised September 16, 1996; Online November 06, 2007


In this study, the use of the ground as the heat source for a heat pump was studied by computer simulation. The heat extraction system consisted of vertical pipes drilled into the ground where groundwater was present. Along with available thermal energy, potential environmental effects, such as freezing and thermal pollution, were examined. It was found that the presence of groundwater enhances system performance by decreasing the possibility of freezing but, on the other hand, increases the range of thermal effects in the ground. The temperature of the ground as well as extraction arrangements also have a significant effect on system performance.

Copyright © 1996 by The American Society of Mechanical Engineers
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