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Cogeneration using multi-effect distillation and a solar-powered supercritical carbon dioxide Brayton cycle

Journal Article · · Desalination
 [1];  [1];  [1];  [1]
  1. National Renewable Energy Lab. (NREL), Golden, CO (United States)
Supercritical carbon dioxide (sCO2) Brayton cycles are considered to be a potentially viable option for reducing the cost of electricity generation from solar power tower plants, owing to theoretically high efficiency, low compressor work, and compact turbomachinery. These cycles have relatively high heat rejection temperatures (>70 degrees C), which are ideal for integration with multi-effect distillation (MED) for distillate generation from seawater, without being a parasitic load to the power plant as compared to cogeneration with steam Rankine cycle. The intermittency of solar radiation reduces the annual capacity factor of concentrating solar power (CSP) plants to about 50-60% even with a molten salt storage tank of 10-h. This reduces the annual distillate generation and increases the cost of the distillate. A novel concept to reduce distillate cost is introduced, whereby the waste heat from the sCO2 Brayton cycle is stored. A two-tank demineralized water storage tank is selected and is shown to allow for the integration of a smaller MED system operating at an increased capacity factor. The optimal storage tank design reduces the distillate cost by 19% and increase the MED capacity factor from 46.4% to 75%. Different coastal locations with good solar resource are studied for cogeneration with the CSP-sCO2 Brayton cycle. Techno-economic analysis shows the cost of distillate produced by MED is 16% cheaper than the distillate produced from reverse osmosis system for Yanbu, Saudi Arabia.
Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE; USDOE National Renewable Energy Laboratory (NREL), Laboratory Directed Research and Development (LDRD) Program
Grant/Contract Number:
AC36-08GO28308
OSTI ID:
1502344
Alternate ID(s):
OSTI ID: 1547660
Report Number(s):
NREL/JA--5500-72113
Journal Information:
Desalination, Journal Name: Desalination Journal Issue: C Vol. 459; ISSN 0011-9164
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (31)

Optimal Temperature Selection for Energy Integrated Multiple-Effect Evaporator System journal July 2017
A review of low-flow, stratified-tank solar water heating systems journal January 1989
The economic feasibility of small solar MED seawater desalination plants for remote arid areas journal April 2001
Thermal energy storage for low and medium temperature applications using phase change materials – A review journal September 2016
Integration of thermo-vapor compressor with multiple-effect evaporator journal December 2016
Multi-objective optimization of RO desalination plants journal March 2008
Steady state model for multi-effect distillation case study: Plataforma Solar de Almería MED pilot plant journal March 2014
Boosted Multi-Effect Distillation for sensible low-grade heat sources: A comparison with feed pre-heating Multi-Effect Distillation journal June 2015
Effect of design parameters on thermodynamic losses of the heat transfer process in LT-MEE desalination plant journal November 2015
Thermoeconomic comparison of integrating seawater desalination processes in a concentrating solar power plant of 5 MWe journal August 2016
Improving power and desalination capabilities of a large nuclear power plant with supercritical CO 2 power technology journal May 2017
A Comparison of Supercritical Carbon Dioxide Power Cycle Configurations with an Emphasis on CSP Applications journal January 2014
Thermal Analysis of a Multi Effect Distillation Plant Powered by a Solar Tower Plant journal May 2015
Comparison between CSP+MED and CSP+RO in Mediterranean Area and MENA Region: Techno-economic Analysis journal May 2015
Energy optimization in parallel/cross feed multiple-effect evaporator based desalination system journal September 2016
Energy integration of multiple-effect evaporator, thermo-vapor compressor, and background process journal October 2017
Optimal feed flow sequence for multi-effect distillation system integrated with supercritical carbon dioxide Brayton cycle for seawater desalination journal September 2018
Review of supercritical CO2 power cycle technology and current status of research and development journal October 2015
Thermal energy storage technologies and systems for concentrating solar power plants journal August 2013
Thermal energy storage: Recent developments and practical aspects journal March 2016
Integrating desalination with concentrating solar thermal power: A Namibian case study journal January 2018
Optimal time-invariant operation of a power and water cogeneration solar-thermal plant journal September 2011
Molten salt power towers operating at 600–650 °C: Salt selection and cost benefits journal April 2018
SolarPILOT: A power tower solar field layout and characterization tool journal September 2018
Energy Integration of Multiple Effect Evaporators with Background Process and Appropriate Temperature Selection journal February 2016
Quasi-steady state simulations of thermal vapor compression multi-effect distillation plants coupled to parabolic trough solar thermal power plants journal April 2016
Integration between concentrated solar power plant and desalination journal June 2016
Performance Characteristics of an Operating Supercritical CO2 Brayton Cycle journal September 2012
Thermodynamic Study of Advanced Supercritical Carbon Dioxide Power Cycles for Concentrating Solar Power Systems journal June 2013
Potential of Concentrating Solar Power Plants for the Combined Production of Water and Electricity in MENA Countries journal June 2013
On the Path to SunShot - Advancing Concentrating Solar Power Technology, Performance, and Dispatchability report May 2016

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