BHARATI VIDYAPEETH INSTITUTE OF TECHNOLGY

Department of mechanical engineeringPresentation on-

CRYOCARPresented By-

Dilip Thakur & Nikhil Boble

Introduction:

Use of alternate resources

PollutionHuman greed

CRYOCAR

uses

Cryogenic fuel

like

Liquid Nitrogen

What is liquid nitrogen vehicle?

Cryogenic fluid as a working fluid

Cryogenic substance is used as a heat sink

CRYOGENICS

Why Liquid Nitrogen?

• Liquid nitrogen is the liquefied form of the element “nitrogen” that is commercially produced by fractional distillation of liquid air.

Dust Precipitator

Inter Cooler

Nozzle

Insulated Chamber

LN2

Turbo Pumps

Air Inlet

Fractional

distillation

Dewar Flask

Formation Of LN2:

Expansion

Main Components of the Engine:

Dewar Flask

Heat Exchanger

Pressurant Bottles

Air Motor

Economizer

Exhaust

Working Principle:

Cryogen storage vessel

Pump

EconomizerHeat Exchanger

Expander Engine

EXHAU

ST

Efficiency:

The first LN2 car could travel 79 miles (127.58 km) on a full 24 gallon (90 liter) tank of liquid nitrogen going 32 Kmph.

Its maximum speed was over 56 Kmph.

After further Researches, the Efficiency has improved as follows: Power : 78KW or 104.5bhp @ 97Kmph 400 Liters (106 gallon) gives a mileage of 560Km and weighs

280Kg Operating Cost is around 2.4cents per Km( Re 1 per Km)

Advantages:

• Car is much lighter in weight

• Refilling its tank takes only 15 minutes.

• Eco-friendly• Minimal Maintenance

Costs

• Requires a lot of energy• Gas is so cold that the

moisture in the surrounding air would condense on the outside of the tubes.

• Safety issue

• Leakage of N2 leads to prove fatal.

Disadvantages:

Even though the technology is 10 to 12 years old, still it has not come to the market for two reasons:

• Safety issues have not been sorted out as yet.

• Lack of funds for research.

Why not commercialized?

Probable Solutions:

• A tube within a tube design.• N2 passes back and forth inside a set of three nested

tubes. • By the time it reaches the outermost tubes, the N2 is

warm enough that the exterior wall of the tube remains above the freezing point of water.

Conclusion:

• In a real sense, the more such vehicles are used, the cleaner the air will become.

• In addition to the environmental impact of these vehicles, refueling using current technology can take only a few minutes, which is very similar to current gas refueling times.

References:

• “LN2000”, University of Washington Research Team, Sept. 18, 2007

• “Liquid Nitrogen”, Wikipedia Online Encyclopedia.• www.slideshare.com• www.authorstream.com• www.royalauto.in

THANK YOU!