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Dynamic simulation and experimental validation of a two-phase closed thermosyphon for geothermal application

Propulsion and Power Research 2017年第2期6卷 107-116页

作者： Johann-Christoph Ebeling Xing Luo stephan kabelac Sebastian Luckmann Horst Kruse Institute for Thermodynamics.Leibniz University of Hannover Callinstrafie 3630167 HannoverGermany Forschungszentrum fur Killtetechnik und Wdrmepumpen GmbH.Weidendamm 14 30167 HannoverGermany

The heat transfer perfonmance of a vertical two-phase closed thermosyphon(TPCT)used in a geothermal heat pump was experimentally *** TPCT is a verticalplain steel pipe with inner diameter of 114 mm and bored 368 m deep *** dioxide(CO_(2))is used as working *** the TPCT there is no condensation ***_(2)is condensed by the evaporator pf the heat pump,flows into the head of the TPCT and nuns down as a falling film along the inner wall of the *** the heat transfer simulation in the TPCT,a quasi-dynamic model in which the mass transfer between the liquid and vapor phases as well as the conduction heat transfer from the surrounding soil towards the pipe is treated *** the film flow modeling is based on the Nusselt theory of frilm *** compauison of the experimental data with the numerical simulation is presented and discussed.

关键词： Two-phase closed thermosyphon(TPCT) Geothermal thermosy-phon Falling film evaporation Geothermal heat pump Dynamic simulation Experimental validation

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