ENHANCED POWER AND DESALINATION PERFORMANCE IN MEDX PLANT DESIGN UTILIZING BRINE-WASTE AND SINGLE-TEMPERATURE- THERMAL ENERGY STORAGE COUPLED TO THERMAL VAPOR EXPANDER
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United States of America Patent
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Sep 21, 2023
app pub date -
Oct 20, 2022
filing date -
Feb 11, 2019
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Multi-effect-distillation (MED) systems of several designs are among the most energy-efficient technologies used in seawater desalination, throughout the world today; typically, energy consumed being <15 kWh / m^3 distillate produced. One caveat in all MED systems is the disposition of the brine-waste reject product with respect to the environment; per unit volume fresh water produced, typically, two units of waste brine media with salinity in excess of 50 g/l, must be dispersed responsibly. Herein is described a MEDX design coupled with thermal-vapor-expanders (TVX) utilizing energy recovered in said brine-waste media, wherein salt-gradient-solar-ponds (SGSP) are used alongside molten salts single-temperature thermal energy storage (SITTES) as principle thermal energy sources (TES) redirected to the MEDX plant, 24/7. Quantifiable electric power production and an additional ~2500 m^3/d distillate, is attained above that produced in a hypothetical 20-effect MEDX plant thru recycling said waste brines into said 20-effect MEDX plant, integrating both flash-chambers (FC) and negative pressure tanks (NPT) in the fore and end-stages, respectively of said MEDX plant.
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