Exploration on the reverse calculation method of groundwater velocity by means of the moving line heat source

Wenke Zhang, Hongxing Yang, Nairen Diao, Lin Lu, Zhaohong Fang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

7 Citations (Scopus)

Abstract

The research on the influence that groundwater exerts on borehole ground heat exchanger has been made progress. However, the investigation on how to obtain the groundwater velocity is a little. According to the line heat source model with groundwater flow, a new methodology is explored to obtain the value and direction of groundwater velocity while it flows through borehole. Some points are distributed around borehole and they have the same distance to the center line of borehole, and the temperature responses of these points are significant parameters which lay firm foundation for reverse-reasoning. The reverse-reasoning calculation can be conducted by establishing objective function. The comparisons of temperature responses between theoretical results and the simulative recorded data are made. The impact degree of groundwater flow can be displayed and then the velocity is estimated. Differences among points' temperature responses are made full use of to respectively indicate the direction and value ranges of velocity. The relativity between the points' location and the velocity intensity is investigated and then some cases are chosen as the trials to verify the rationality of reverse calculation method. To a large extent, the research work of this paper provides theoretical guidance or computing mode for getting velocity of groundwater. The methodology can be employed for obtaining the velocity in actual engineering projects or other cases.
Original languageEnglish
Article number4504
Pages (from-to)52-63
Number of pages12
JournalInternational Journal of Thermal Sciences
Volume99
DOIs
Publication statusPublished - 1 Jan 2016

Keywords

  • Ground heat exchanger
  • Groundwater
  • Line source
  • Objective function
  • Reverse calculation
  • Squared deviation

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Engineering(all)

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