Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
OPTIMIZATION AND THERMOECONOMIC ANALYSES IN DUAL PLANTS TO THERMAL DESALINATION WITH INTEGRATED SOLAR RANKINE CYCLE FOR DEVELOPMENT IN SÃO MATEUS – ES
Submission Author:
Carlos Filipe Lacerda Martins , BA
Co-Authors:
Carlos Filipe Lacerda Martins, Felipe Malheiros, Hiago Braz, Igor Belisario, Izabela Barbosa, Carlos Eduardo Silva Abreu
Presenter: Carlos Filipe Lacerda Martins
doi://10.26678/ABCM.COBEM2021.COB2021-1496
Abstract
In drought times, the residents of São Mateus, in Espírito Santo, live with the high salinity in the water distributed for Supply Water and Sewage System (SAAE). It is justified due to low level from the Cricaré river in these times and, hence, the sea water goes to over to collect point to water treatment, as well as the alternative of the city was the construction of artesian posts. Another consequence of dry times is the increase of electric energy cost in Brazil, due to the incidence of tariff flags, when the emergency thermoelectric should be to turn it on. Then, a possible alternative is the use of an Integrated Solar Rankine Cycle (ISRC) to energy generation and a thermal desalination process to solution of these problems simultaneously. Thus, aims in this paper the evaluation and optimization of thermal parameters of a thermal plant to desalination type multi-effect (MED) with 4 different setups to the Rankine cycle integrated with parabolic solar collectors to power supply. Therefore, in this paper is used the genetic algorithms to the optimization method in the software Engineering Equation Solver (EES). It was defined as the decision variables the inlet pressure of turbine and condenser, isentropic efficiency of turbine and the pumps, the rate of steam to the desalination chamber, the temperature variation in the superheat and the collector area. It was used to the parabolic collectors the therminol VP1, due to its greater temperature to operation than others thermals oils like therminol XP and therminol 66, for example. Another objective in this paper is the exegetics and monetary costs analyses to electric energy and fresh water production using the H&S model, with annual average of 600W/m² radiation emission and 2,400 m³/day to fresh water production. With the first setup, it was possible to reach 8.15 R$/MWh and 0.75 R$/m³ to energy and fresh water production, respectively, with 12.41 MW of net power and a collector area of 90,279 m².
Keywords
desalination, ISRC, costs, Optimization
