New Trends in Energy - OSeMOSYS
Transcript of New Trends in Energy - OSeMOSYS
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New Trends in EnergyDesalination
Constantinos Taliotis
2017-10-10 New trends in Energy 1
Introductory lecture – Energy commodities and technologiesThis work by OpTIMUS.community is licensed under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
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Motivation for energy technology research and development
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Why innovate?
Energy Efficiency – Cost Efficiency
• The cheapest kWh is a kWh not generated
• Making the best out of the available resources
Energy Security
• Resilient and robust energy system
• Taking advantage of domestic energy sources leads to reduced reliance on fuel imports
Climate Change
• Transition to low-carbon economy
Health and environment
• Reduced emission of air and water pollutants that adversely affect health
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Water Desalination
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Water availability - 2011
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Source: Maplecroft, WaterStress Index 2011
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Projections of Global Water Stress
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Source: PhilippeRekacewicz (Le Monde diplomatique), February2006
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Water consumption projection - Israel
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Source: OECD EnvironmentalPerformanceReviews: Israel 2011
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Desalination
Removal of minerals from saline water (i.e. brackish or seawater) to produce freshwater
• Increasing importance in arid/semi-arid countries
• Energy intensive process - hence an expensive option• Processes tend to need either input of thermal energy (e.g. multi-effect distillation) or
electricity (reverse-osmosis)
• Used in 150 countries (International Desalination Association, 2015)
• 86.8 million m3 per day
• Serves more than 300 million people
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Main desalination technologies
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Mechanical
• Reverse Osmosis – a form of diffusion and occurs when two solutions of different concentrations are separated by means of a semipermeable membrane.
Thermal
• Multi-stage Flash - based on vapour generation from seawater or brine as it enters a chamber (stage) which is at a lower pressure than its saturation pressure, causing flash evaporation.
• Multi-effect Distillation – seawater is sprayed as a thin film and is distilled through a series of distillation steps.
Total worldwideinstalled capacity bytechnology (Pankratz2014)
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Main desalination technologies
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Reverse Osmosis
Source: Fritzmannet al, 2007
Multi-stage Flash
Multi-effect distillation (example of one effect)
Source: Palenzuelaet al, 2015
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Desalinated seawater – reverse osmosis costs
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Source: OECD EnvironmentalPerformanceReviews: Israel 20112017-10-10
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Coupling of RE with desalination?
Strong potential for co-benefits
• Intermittency in RE generation can be accommodated with varying desalination output in reverse osmosis plants• Desalination as a form of storage in
electricity systems
• Direct use of solar heat –combined power and water
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Source: Palenzuelaet al, 2015
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Solar still and Desalination
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Source: Abutayehet al, 2014
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Solar PV and Reverse Osmosis
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Source: Al-Karaghouliand Kazmerski, 2011
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CSP and Multi-Stage Flash
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Source: Abutayehet al, 2014
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Suggested further reading
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• The Future of Seawater Desalination: Energy, Technology, and the Environment http://science.sciencemag.org/content/333/6043/712.full
• Desalination using renewable energy sources on the arid islands of South Aegean Sea http://www.sciencedirect.com/science/article/pii/S0360544215015248
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Date Author Reviewer Reviser
2017-10-10 Constantinos Taliotis Agnese Beltramo Constantinos Taliotis
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Changelog and attribution
To correctly reference this work, please use the following:Taliotis, C., 2017. New Trends in Energy – Desalination, OpTIMUS.community. Available at: http://www.osemosys.org/understanding-the-energy-system.html. [Access date]