An analytical solution for heat transfer at a boiling front moving through a porous medium
نویسنده
چکیده
A problem of current interest in geothermal energy extraction is the injection of cold water into a porous medium containing superheated vapor. Such injection will cause a boiling front to move away from the injection point. When flow is approximated as being one-dimensional radial, it can be shown from similarity variable concepts that temperature, pressure, and boiling rate at the front are constant, independent of time. From heat and mass balance considerations an analytical solution is obtained for front temperature and evaporation rate. Comparison with detailed numerical simulations of the injection process shows excellent agreement.
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