Some results about the sensitivity of the thermal conductivity of the ground and the design temperatures for the heat transfer fluid in the design of low enthalpy geothermal systems

  1. Ignacio Martín Nieto 1
  2. Cristina Sáez Blázquez 1
  3. Arturo Farfán Martín 1
  4. Diego González-Aguilera 1
  1. 1 Universidad de Salamanca

    Universidad de Salamanca

    Salamanca, España


Ibero-American Conference on Smart Cities

ISBN: 978-958-5583-78-8

Year of publication: 2019

Pages: 496-506

Congress: Ibero-American Conference on Smart Cities (ICSC-CITIES 2019)

Type: Conference paper


In the design of large geothermal installations, accurate knowledge of the thermal characteristics of the ground is very important. An erroneous estimation of the thermal conductivity of the geological environment can make our project a failure, because there are large differences between the correct drilling lengths for different values of this parameter. Apart from an exact knowledge of the thermal conductivity of the ground, there is another way to mitigate this negative effect, it is to reduce the restriction of the thermal fluid's working temperature. This work shows how there is an attenuation of the sensitivity of drilling length of the well field against thermal conductivity when we allow lower operating temperatures in the geothermal fluid.

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