13-06-2012, 05:19 PM
FROST FREE HEAT EXCHANGER FOR CRYOGENIC AUTOMOTIVE PROPULSION
[attachment=24409]
INTRODUCTION
The Air Resources Board enacted the Low Emission Vehicle(LEV).
Zero Emission Vehicle (ZEV).
Pollution can cause aching lungs, wheezing, coughing and head aches.
Serious health problems.
Children are at particular risk.
Currently, battery powered electric vehicle is the only commercially available technology that meet ZEV standards.
Slow recharge and high initial cost.
The energy storage medium may well be liquid nitrogen.
Frost free heat exchanger performance.
CRYOGENIC AUTOMOTIVE PROPILSION
The cryogenic automobile is a ZEV.
Operates on the thermo dynamic potential between the ambient atmosphere and a reservoir of liquid nitrogen.
The liquid nitrogen is drawn from a tank ,pumped up to system pressure.
Vaporized and superheated in a heat exchange system.
High pressure and ambient temperature gas-system does work.
The spent low pressure gas is exhausted back to atmosphere.
CONCLUSION
The cryogenic automobile is a potential contender in the ZEV market , provided certain key technologies are demonstrated. One of these technologies is the development of an all weather heat exchange system.
A heat exchanger that works well in a variety of operating conditions, is structurally robust, and is not hampered by the build up of frost is a necessary technology for the cryogenic automobile.
Experiments are yet to be conducted to determine the actual performance.
Until road test experiments are conducted, the actual thermal performance will not be known with enough accuracy to support an overall recommendation for the final heat exchange system design.
[attachment=24409]
INTRODUCTION
The Air Resources Board enacted the Low Emission Vehicle(LEV).
Zero Emission Vehicle (ZEV).
Pollution can cause aching lungs, wheezing, coughing and head aches.
Serious health problems.
Children are at particular risk.
Currently, battery powered electric vehicle is the only commercially available technology that meet ZEV standards.
Slow recharge and high initial cost.
The energy storage medium may well be liquid nitrogen.
Frost free heat exchanger performance.
CRYOGENIC AUTOMOTIVE PROPILSION
The cryogenic automobile is a ZEV.
Operates on the thermo dynamic potential between the ambient atmosphere and a reservoir of liquid nitrogen.
The liquid nitrogen is drawn from a tank ,pumped up to system pressure.
Vaporized and superheated in a heat exchange system.
High pressure and ambient temperature gas-system does work.
The spent low pressure gas is exhausted back to atmosphere.
CONCLUSION
The cryogenic automobile is a potential contender in the ZEV market , provided certain key technologies are demonstrated. One of these technologies is the development of an all weather heat exchange system.
A heat exchanger that works well in a variety of operating conditions, is structurally robust, and is not hampered by the build up of frost is a necessary technology for the cryogenic automobile.
Experiments are yet to be conducted to determine the actual performance.
Until road test experiments are conducted, the actual thermal performance will not be known with enough accuracy to support an overall recommendation for the final heat exchange system design.