Gas turbine waste heat recovery distillation system |
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| Institution: | 1. Universidad Autónoma de Querétaro, Facultad de Ingeniería, Cerro de las Campanas s/n Col. Las Campanas, Querétaro, Querétaro, 76010, México;2. Universidad Autónoma de Querétaro, Facultad de Química, Cerro de las Campanas s/n Col. Las Campanas, Querétaro, Querétaro 76010, México;3. Tecnológico Nacional de México, Instituto Tecnológico de Celaya, Departamento de Ingeniería Química, Av. Tecnológico y A.G. Cubas s/n, Celaya, Guanajuato, 38010, México |
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| Abstract: | This article presents a method for improving the gas turbine's performance through an efficient utilization of the waste heat in a distillation system with a special arrangement. This consists of two trains of VTE/MEB connected to increase the fresh water produced. Exhaust gases from the gas turbine are used in a multi-temperature level heat recovery system with five feed heaters, and gases are released to ambient at 130°C. Distillation top train has nine effects and evaporation range from 130 to 82°C while the bottom train has six effects with evaporation range from 76 to 46°C and is supplied with the steam leaves the last effect in the top train.Thermal analysis using a 32.67 MW gas turbine showed that the present arrangement can produce 3.2 million gallons per day (mgd) of fresh water with more than 4 g/kWh at a performance ratio (PR) of 8.8. This is 34% more than that produced in an existing gas-turbine distillation combination and 14% more than that expected from a reverse osmosis plant driven by a bottoming Rankine power cycle. |
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