Publication detail

SIMPLIFIED NUMERICAL MODEL OF THERMAL CONDUCTION AROUND THE GEOTHERMAL BOREHOLES AND ITS VERIFICATION BY PROGRAM FEFLOW

LEITER, A.

Original Title

SIMPLIFIED NUMERICAL MODEL OF THERMAL CONDUCTION AROUND THE GEOTHERMAL BOREHOLES AND ITS VERIFICATION BY PROGRAM FEFLOW

Type

conference paper

Language

English

Original Abstract

One of exploitation methods of geothermal energy is the use of a grid of geothermal wells. The grid is to be used when the demanded power is high. The grid is characterized by its shape and dimensions. Compliance with the exact dimensions, however, is difficult. The real grid of geothermal wells usually has a distorted geometry. Boreholes are also often drilled with a deviation. This degrades thermal properties of such a system. This paper contains a simplified mathematical model used for studying the temperature field around the borehole. The model takes into consideration only heat conduction in a thin bordered plate and is based on a commonly known heat equation. Only the steady-state is considered. One reference and next six variants of borehole systems are solved by the model. The results show lowest thermal resistance of systems with larger numbers of boreholes placed evenly and worsening of the system parameters in cases of distorted geometry among the boreholes. Studied variants are verified by specialized software FEFLOW.

Keywords

geothermal borehole geometry, distortion of grid geometry, borehole deviation, numerical model of the borehole system

Authors

LEITER, A.

RIV year

2014

Released

17. 6. 2014

Publisher

STEF92 Technology Ltd., 1 "Andrey Lyapchev" Blvd., 1797 Sofia, Bulgaria

Location

Albena, Bulharsko

ISBN

978-619-7105-08-7

Book

14th GeoConference on SCIENCE AND TECHNOLOGIES IN GEOLOGY, EXPLORATION AND MINING (Conference Proceedings Volume II)

ISBN

1314-2704

Periodical

International multidisciplinary geoconference SGEM

Year of study

2014 (2)

State

Republic of Bulgaria

Pages from

791

Pages to

798

Pages count

8

BibTex

@inproceedings{BUT112684,
  author="Augustin {Leiter}",
  title="SIMPLIFIED NUMERICAL MODEL OF THERMAL CONDUCTION AROUND THE GEOTHERMAL BOREHOLES AND ITS VERIFICATION BY PROGRAM FEFLOW",
  booktitle="14th GeoConference on SCIENCE AND TECHNOLOGIES IN GEOLOGY, EXPLORATION AND MINING (Conference Proceedings Volume II)",
  year="2014",
  journal="International multidisciplinary geoconference SGEM",
  volume="2014 (2)",
  pages="791--798",
  publisher="STEF92 Technology Ltd., 1 {"}Andrey Lyapchev{"} Blvd., 1797 Sofia, Bulgaria",
  address="Albena, Bulharsko",
  doi="10.5593/sgem2014B12",
  isbn="978-619-7105-08-7",
  issn="1314-2704"
}