solar thermal group department of engineering solar thermal group department of engineering and...
TRANSCRIPT
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Solar Thermal GroupDepartment Of Engineering
Solar Thermal GroupDepartment Of Engineering
and beyond!
Concentrated Solar Power:
to
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Solar Thermal GroupDepartment Of Engineering
OverviewJeff• Solar-thermal basics• The new Big Dish! **Now Even Bigger!**• Some research
Rebecca• Solar-thermal power in Las Vegas• Ammonia storage• Some more research
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Solar Thermal GroupDepartment Of Engineering
Concentrated Solar Power – The Basics
•Parabolic-shaped mirror
•Receiver at focal point
•Solar Radiation heats fluid medium or drives chemical reaction
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Solar Thermal GroupDepartment Of Engineering
Why Solar Thermal?
• Solar Thermal arrays as ‘baseload’ power stations
• Transition to renewables via add-on to existing plants
• Large-scale energy storage!
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Solar Thermal GroupDepartment Of Engineering
The old dish looks like this
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Solar Thermal GroupDepartment Of Engineering
Sorry, commercial in confidence ☻
The new dish looks like
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Solar Thermal GroupDepartment Of Engineering
Some clues…Some clues…• Its bigger (from 400m2 to 500m2)
• Square mirrors rule
• Joining frames like this is bloody expensive
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Solar Thermal GroupDepartment Of Engineering
The siteThe site
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Solar Thermal GroupDepartment Of Engineering
The site last weekThe site last week
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Solar Thermal GroupDepartment Of Engineering
1st big Dish demonstration power system planned for Whyalla, South Australia
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Solar Thermal GroupDepartment Of Engineering
Some Research Directions
• Videographic Flux Mapping• Raytracing• Receiver modelling• Transient Simulations
0
25,000
50,000
75,000
100,000
125,000
150,000
175,000
200,000
225,000
1988
1989
1990
1991
1992
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1994
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1996
1997
Gig
awat
ts
Power Output
Average Solar Radiation/month
Linear (Average SolarRadiation/month)Linear (Power Output)
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Solar Thermal GroupDepartment Of Engineering
Solar Thermal GroupDepartment Of Engineering
Concentrated Solar Power in Vegas!
• Nevada Solar One – 64 MW• Typical coal power station ~ 2000 MW• Home photovoltaic array ~ 2 kW
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Solar Thermal GroupDepartment Of Engineering
Solar Thermal GroupDepartment Of Engineering
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Solar Thermal GroupDepartment Of Engineering
Solar Thermal GroupDepartment Of Engineering
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Solar Thermal GroupDepartment Of Engineering
Solar Thermal GroupDepartment Of Engineering
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Solar Thermal GroupDepartment Of Engineering
Solar Thermal GroupDepartment Of Engineering
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Solar Thermal GroupDepartment Of Engineering
Solar Thermal GroupDepartment Of Engineering
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Solar Thermal GroupDepartment Of Engineering
Solar Thermal GroupDepartment Of Engineering
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Solar Thermal GroupDepartment Of Engineering
Back to storage
Solar Thermal GroupDepartment Of Engineering
• Molten salt• Hot oil• Superheated steam
concentrator storage24 hour electricity
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Solar Thermal GroupDepartment Of Engineering
Solar Thermal GroupDepartment Of Engineering
Ammonia storage
ammonia (liquid)
heat nitrogen (gas)
hydrogen(gas)
700oC500oC
Ruthenium catalyst3 2 22 3NH H N H
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Solar Thermal GroupDepartment Of Engineering
Solar Thermal GroupDepartment Of Engineering
Little Dish
20m2 (Big Dish 400m2)
Ammonia thermochemistry
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Solar Thermal GroupDepartment Of Engineering
Solar Thermal GroupDepartment Of Engineering
Rim angle = 70o
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Solar Thermal GroupDepartment Of Engineering
Solar Thermal GroupDepartment Of Engineering
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Solar Thermal GroupDepartment Of Engineering
Solar Thermal GroupDepartment Of Engineering
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Solar Thermal GroupDepartment Of Engineering
Solar Thermal GroupDepartment Of Engineering
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Solar Thermal GroupDepartment Of Engineering
Solar Thermal GroupDepartment Of Engineering
Questions?
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Solar Power station to provide all of Australia’s energy needs ?
Legend
greater than 24MJ/m2day
less than 24 but greater than 23mJ/m2day
less than 23 but greater than 22mJ/m2day
less than 22 but greater than 20mJ/m2day
less than 20 but greater than 18mJ/m2day
less than 18 but greater than 16mJ/m2day
less than 16MJ/m2day
Australian and New Zealand Solar Energy Society
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Land Area for a Solar Future
• Assume:
5000Wh/m2/day average insolation
5000PJ = 5x1018J required per year
Conversion of solar energy at 20% efficiency
• 5000Wh/m2/day x 365days x 0.2 = 1314MJ/m2/year• (5 x 1018J/year)/(1.314 x 109J/m2 /year) = 3.81 x 109m2
=3805km2 = 61.7km x 61.7km• Allowing for spacing between collectors:
@ 10% coverage; 38052km2 = 195km x 195km
@ 20% coverage; 19026km2 = 138km x 138km