engines with working fluids of argon (dibble cycle ... - tju

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