engines with working fluids of argon (dibble cycle ... - tju
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Engines with Working fluids of Argon (Dibble Cycle)
Carbon Dioxide (Allam Cycle )No Exhaust Power Plants,
Energy Storage, Enhanced Oil Recovery,
Ships and Locomotives Professor Robert W Dibble
Department of Mechanical EngineeringClean Combustion Research Center
KAUST Saudi Arabia
Wed. 22 August 2018 SKLE Tianjin China
Exciting times in Combustion Research for two reasons:
1.Price of Fuel Steadily Increasing ?
2.“Global Warming” Legislation Increasing
As a consequence of either topic above, there is
renewed effort for increased engine efficiency
(use less money and generate less CO2 ) and a
search for alternative “ renewable” fuels.
There is also new money for new (and old) ideas.
KAUST is in West Saudi Arabiathe oil in in the East
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“70 % of Aramco oil goes to China”
Enhance Oil Recovery: EOR.
Inject 6 tons of CO2 to stimulate “production ” of 1 ton of Oil
Each ton of oil is now carbon negative
? Carbon credits ?
? Bitcoins ?
Injection pressure is about 300 bar.
A likely route for Saudi Arabia to combat Climate Change: profitable !
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Brayton Cycle, with “regeneration” ( a heat exchanger ! )
Whoa !
1…low gamma ! “k”
CO2 better than N2 !
2….low pressure ratio, r=1 ?
Whoa !
2….low pressure ratio, r=1 ?
1…low gamma ! “k”
CO2 better than N2 !
What about SF6 ? Freon? NH3?
AMA “Ask Me Anything”
Allam cycle Oxy-fuel combustion at 300bar
10 Mega Watts, no “new” combustion
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Deviation from ideal gas behaviour “ Z-Chart
Less Work to compress a van der Waals gas
𝑾𝑹𝒆𝒂𝒍
𝑾𝑰𝒅𝒆𝒂𝒍= 𝟎. 𝟓𝟎
Limiting case isothermal compression (k=1)
Clever ! Less work !
𝑾𝑹𝒆𝒂𝒍
𝑾𝑰𝒅𝒆𝒂𝒍= 𝟎. 𝟕𝟒
Limiting case adiabatic compression
Review
• CO2 cycle can replace a combine cycle of gas turbine and steam turbine…. Save $$ 50% ?
• Allam cycle at 300 bar machine is Smaller ! ?
• Heat exchanger is “essential”
• Compression near critical point clever trick
• BONUS see next slide
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Think Big !Ocean Container Ships have 100MW engines
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60% Efficient Engines exist NOW !
Efficiency increases with size, less heat lossNote: 10 to 50 MegaWatts ….WOW
Argon Engine is Simple
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Think Big !Ocean Container Ships have 100MW engines
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idea
l en
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compression ratio,
The most efficient and cleanest engine in history (~60% and zero emissions) by optimizing the working
fluid Use argon instead of nitrogen !!!
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CRefficiencyengine
=1.67
=1.3
=1.4gasolineengines
diesel
H2-O2-Arengines
= cp/cv, specific heat ratio
CR
? Dibble Cycle ?
CCRC SAB 16-17 March 2015
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Zero Emissions Power Cycles Apr 23, 2009.
by Evgeny Yantovsky , J. Gorski , Mykola Shokotov ·
Kindle Edition. $46.36$4636. Available for download now.
Engines with Working fluids of Argon (Dibble Cycle)
Carbon Dioxide (Allam Cycle )No Exhaust Power Plants,
Energy Storage, Enhanced Oil Recovery,
Ships and Locomotives Professor Robert W Dibble
Department of Mechanical EngineeringClean Combustion Research Center
KAUST Saudi Arabia
Wed. 22 August 2018 SKLE Tianjin China