Humidification-dehumidification desalination process using green hydrogen and heat recovery

Abstract We propose the use of green hydrogen as a fuel for seawater heater in humidification / dehumidification (HDH) desalination plant to increase its productivity, allow scaling large dimensions without negative environmental effects, and guarantee continuous operation. develop mathematical model proposed HDH configuration. For operating conditions that very low NOX production, consumption is ~0.03 kg H2 per pure water produced. If exhaust gases from are used heat recovery, GOR equipment may by up 39 % relation same recovery. The operation cost freshwater comparable costs obtained other literature. produced combustion condensed during recovery process then added produced, production reduced 20 %. found an excess air air+fuel mix beyond minimum value appropriate generation does not provide significant benefits. efficiency has impact on water, but this strongly mitigated process. Fuel increases proportionally with decrease effectiveness device, which key parameter optimal performance. A also good alternative auxiliary power source On sunny hours be productivity preheating seawater, at night system could operate 100 based H2.