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ENCIT 2022
19th Brazilian Congress of Thermal Sciences and Engineering
ASSESSMENT OF DESALINATION VIA MEMBRANE DISTILLATION USING LOW-GRADE WASTE HEAT IN SMALL MODULAR REACTORS
Submission Author:
Renato Machado Cotta , RJ
Co-Authors:
Gabriel Caetano Gomes Ribeiro da Silva, Kleber Marques Lisbôa, Su Jian, Carolina Palma Naveira Cotta, Renato Machado Cotta
Presenter: Gabriel Caetano Gomes Ribeiro da Silva
doi://10.26678/ABCM.ENCIT2022.CIT22-0670
Abstract
Membrane distillation has been gaining recognition as an alternative desalination method, with a niche in processing high salinity brines and using low-grade heat sources. In the present analysis, membrane distillation was estimated to produce 2,012.1 m³/day of distilled water using solely the waste heat from the turbine exhaust of NuScale, a well-known small modular reactor (SMR) design. The heat recovery unit was shown to be fundamental for improving the efficiency of the desalination system. When the recovery heat exchangers have an effectiveness of 0.9, the gain-output ratio (GOR), used to assess the desalination efficiency, increased nearly fourfold compared to the system without heat recovery. Results showed that the ratio between the feed and the permeate flow rates presented an optimum value of 2.1 for the studied configuration.
Keywords
nuclear desalination, membrane distillation, small modular reactors, cogeneration, Waste Heat Recovery (WHR)
