Performance of Geothermal Thermosyphon Using Propane

Numerical investigation of the performance of a partially wetted geothermal thermosyphon at various power demand schemes

“…The temperatures are presented, see the bottom abscissa, for three selected times, namely, 0 min, 34 min and 183 min. The measurement data is obtained with a fibre-optic temperature measurement on the outside of the pipe (see Grab et al, 2011), and illustrated with errorbar symbols depicting the variation. The depth-dependent wetting ratio, see topside abscissa, follows Eq.…”

“…The fluid is liquefied at the condenser and the cycle starts again. For further details see Grab et al (2011).…”

“…The performance of a geothermal thermosyphon using propane has been measured and analysed, see Grab et al (2011), and transient temperature distributions along a 100 m pipe have been reported. Storch et al (2012) utilised the same test facility for visual observations of the falling liquid film flow by application of a specially designed camera system being descended inside the pipe down to its lower end.…”