Influence of the heat transfer and operation time of a coaxial probe for deep geothermal energy
Sprache des Vortragstitels:
12. Minisymposium Verfahrenstechnik
Sprache des Tagungstitel:
For this exploratory study, a 6000?m deep coaxial borehole heat exchanger (CBHE) was investigated. The drilling for this CBHE is carried out at a depth of -1000?m from a cavern to minimize the heat losses. In this depth the surrounding reaches already higher temperatures, while a reduction of the heat extraction occurs caused by higher heat loss. In this study the temperature profile along the probe was calculated to present the influence of operating time and the outlet temperatures. Therefor a triple pipe heat exchanger was installed to control the numerical calculation with the experimental model. In addition, the first 1000 m pipe lengths are isolated in order to achieve higher outlet temperatures. The aim is to achieve high heat extraction rates from the underground.