Pressure–enthalpy coupled thermal resistance and capacity model (PH-TRCM) for direct-expansion borehole heat exchangers: Application for supercritical CO2
| Autor: | Messaoud Badache, Parham Eslami-Nejad, A. Nguyen, Arash Bastani |
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| Rok vydání: | 2018 |
| Předmět: |
Work (thermodynamics)
Materials science Renewable Energy Sustainability and the Environment 020209 energy Thermal resistance Enthalpy Borehole Geology 02 engineering and technology Mechanics Physics::Classical Physics 010502 geochemistry & geophysics Geotechnical Engineering and Engineering Geology 01 natural sciences Supercritical fluid Physics::Geophysics Physics::Fluid Dynamics Heat exchanger 0202 electrical engineering electronic engineering information engineering Mass flow rate Transient (oscillation) 0105 earth and related environmental sciences |
| Zdroj: | Geothermics. 76:50-59 |
| ISSN: | 0375-6505 |
| DOI: | 10.1016/j.geothermics.2018.06.007 |
| Popis: | A fully transient model for a direct expansion borehole heat exchanger was modeled by means of the thermal resistance and capacity model approach. The fluid defined in terms of pressure and enthalpy is coupled to the borehole heat exchanger and the surrounding ground described in terms of temperature. This model was compared against the well known infinite cylindrical source model and showed very good agreements for the mean fluid temperature, borehole wall temperature and borehole resistance. For supercritical CO 2 applications, the work demonstrates that both the fluid's inlet pressure and mass flow rate influences the useful length of the BHE. |
| Databáze: | OpenAIRE |
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