Thermoeconomic comparison of integrating seawater desalination processes in a concentrating solar power plant of 5 MWe

Abstract In this work a thermoeconomic analysis of the joint production of electricity and water for a simulated 5 MWe Solar Thermal Power Plant (STPP) based on parabolic trough mirrors and Direct Steam Generation (DSG) is carried out. The location considered for this plant is Almeria, in southeast of Spain. Two different seawater technologies have been selected to be coupled with the STPP: Multi-Effect Distillation (MED) and Reverse Osmosis (RO). The Power Block (PB) has been designed to maximize the thermal efficiency, including regeneration and reheating. Four coupling arrangements have been investigated: the MED replacing the condenser of the PB, the MED being fed by one steam extraction of the PB, the RO directly using the electricity generated in the PB and the RO connected to the local grid. Results show that the best coupling option is with the RO unit being connected to the local grid, which produces the lower Levelized Water Cost (LWC).

[1]  Stefan Will,et al.  Techno-economic analysis of combined concentrating solar power and desalination plant configurations in Israel and Jordan , 2012 .

[2]  Lourdes García-Rodríguez,et al.  Thermoeconomic analysis of a solar parabolic trough collector distillation plant , 1999 .

[3]  Julián Blanco,et al.  Simulation and evaluation of the coupling of desalination units to parabolic-trough solar power plants in the Mediterranean region , 2011 .

[4]  Gonzalo Guillén-Gosálbez,et al.  Multi-objective optimization of solar Rankine cycles coupled with reverse osmosis desalination considering economic and life cycle environmental concerns , 2012 .

[5]  Baltasar Peñate,et al.  Seawater reverse osmosis desalination driven by a solar Organic Rankine Cycle: Design and technology assessment for medium capacity range , 2012 .

[6]  Massimo Moser,et al.  A flexible techno-economic model for the assessment of desalination plants driven by renewable energies , 2014 .

[7]  W. Wagner,et al.  The IAPWS Formulation 1995 for the Thermodynamic Properties of Ordinary Water Substance for General and Scientific Use , 2002 .

[8]  E. Zarza,et al.  INDITEP: The first pre-commercial DSG solar power plant , 2006 .

[9]  Walid ElMoudir,et al.  Economic assessment of thermal desalination processes , 2015 .

[10]  Julián Blanco,et al.  Assessment of different configurations for combined parabolic-trough (PT) solar power and desalinati , 2011 .

[11]  Lawrence L. Kazmerski,et al.  Energy Consumption and Water Production Cost of Conventional and Renewable-Energy-Powered Desalination Processes , 2013 .

[12]  M. J. Moran,et al.  Thermal design and optimization , 1995 .

[13]  Guillermo Zaragoza,et al.  Large-scale solar desalination by combination with CSP: Techno-economic analysis of different options for the Mediterranean Sea and the Arabian Gulf , 2015 .

[14]  Massimo Moser,et al.  Renewable desalination: a methodology for cost comparison , 2013 .

[15]  A. M. Blanco-Marigorta,et al.  Exergetic comparison of two different cooling technologies for the power cycle of a thermal power pl , 2011 .

[16]  J. Lienhard,et al.  Erratum to Thermophysical properties of seawater: A review of existing correlations and data , 2010 .

[17]  N. Fylaktos,et al.  Economic analysis of an electricity and desalinated water cogeneration plant in Cyprus. , 2015 .

[18]  Julián Blanco,et al.  Evaluation of cooling technologies of concentrated solar power plants and their combination with desalination in the mediterranean area , 2013 .

[19]  A. S. Mujumdar,et al.  Combined water and power plant (CWPP) — a novel desalination technology , 2009 .

[20]  Julián Blanco,et al.  Comparison between CSP+MED and CSP+RO in Mediterranean Area and MENA Region: Techno-economic Analysis☆ , 2015 .

[21]  Juan María Sánchez Sánchez,et al.  Estado del arte en el diseño del proceso de plantas desaladoras de agua de mar de gran capacidad , 2008 .

[22]  Gonzalo Guillén-Gosálbez,et al.  Multi-objective design of reverse osmosis plants integrated with solar Rankine cycles and thermal energy storage , 2013 .

[23]  Guillermo Zaragoza,et al.  Characterisation of the coupling of multi-effect distillation plants to concentrating solar power plants , 2015 .

[24]  Carmelo Mineo,et al.  MED parallel system powered by concentrating solar power (CSP). Model and case study: Trapani, Sicily , 2015 .