Optimización teórico-experimental de sondas de calor para intercambio geotérmico (sge) según condiciones hidrogeológicas, características geométricas y propiedades de sus materiales

• Autores: Borja Badenes Badenes
• Directores de la Tesis: Javier Fermín Urchueguía Schölzel (dir. tes.), Javier Soriano Olivares (dir. tes.)
• Lectura: En la Universitat Politècnica de València ( España ) en 2020
• Idioma: español
• Tribunal Calificador de la Tesis: Jorge García Serra García (presid.), Miguel Ángel Pardo Picazo (secret.), César Chamorro Camazón (voc.)
• Programa de doctorado: Programa de Doctorado en Ingeniería del Agua y Medioambiental por la Universitat Politècnica de València
• Materias:
  • Ciencias tecnológicas
    • Tecnología energética
      • Fuentes no convencionales de energía
• Enlaces
  • Tesis en acceso abierto en: RiuNet
• Resumen

  • One of the biggest challenges for the ground source heat pump market is the high cost associated with drilling geothermal borehole heat exchangers. Achieving more efficient geothermal heat exchangers would reduce this cost, since a shorter exchanger length would be required to obtain the same working temperatures in it (same efficiency of the heat pump).

    The thermal efficiency of a geothermal heat exchanger is characterized by its borehole thermal resistance. This borehole thermal resistance depends on a number of parameters, mainly: properties and flow rate of the working fluid that flows through the borehole heat exchanger, diameter of the geothermal borehole, geometry and materials of the heat exchanger pipe and the properties of the borehole grouting material.

    The higher thermal resistance of the heat exchanger, the less heat is transferred between the heat carrier fluid and the ground, resulting in an increased requirement for the length of the buried heat exchanger. Consequently, it is essential to reduce this parameter to the minimum possible.

    Therefore, the main objective of this Ph. Doctoral Thesis is to carry out, based on a comprehensive analytical model of quantification of the impact of the above mentioned parameters, a detailed study to analyze their combined influence on the thermal resistance of the geothermal borehole, but also exploring this effect in other less researched areas, such as economic costs of running the exchanger and operating it (electricity consumption of the heat pump and associated pumping costs).