Vortex Tube Cryogenic & Pressurized Liquid Vaporization
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Transcript of Vortex Tube Cryogenic & Pressurized Liquid Vaporization
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Vortex Tube Cryogenic & Pressurized Liquid Vaporization
An application of the innovative technology of
Prepared by: Gasficient Consulting Services
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Cryogenic & Pressurized Liquids
• Cryogenic Liquids - stored at very low temperatures so remain liquid at low pressure (eg LNG, CO2, N2, O2)
• Pressurized Liquids - stored at ambient air temperature but under pressure so remain liquid (eg Propane, Butane, LPG)
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Vaporization of Cryogenic & Pressurized Liquids
• Cryogenic & Pressurized liquids require heat to gasify
• Where in-tank vaporization does not produce sufficiently rapid vaporization liquid is drawn off and heated outside the tank.
• Often a heat source is used to warm the liquid and to overcome the latent heat of vaporization
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LPG Liquid Vaporization Outside Tank
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Vortex Tube Liquid Vaporization (LPG)
• Vortex tube reduces vaporized LPG pressure and provides mass and energy separation resulting in hot and cold stream outlet from the vortex pressure reducer.
• Vortex tube pre-heats the liquid LPG upstream of the LPG vaporizer thus reducing the fuel consumption of the conventional vaporizer
• The air source heat exchanger warms the vortex cold fraction to compensate for the heat transferred to the liquid LPG
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Process Description
• LPG is vaporized at the storage pressure in the tank (eg 6 bar)
• Pressure reduction (eg to 1 barg) required for distribution or utilization
• Vortex pressure reducer with an integral heat exchange chamber that is warmed due to the mass and energy separation
• Liquid LPG is pre-heated before it enters the LPG vaporizer.
• LPG vapor cold fraction is warmed in the ambient air heat exchanger thus ensuring the vaporized LPG remains in vapor form
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LPG Vaporization
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Benefits
• Enhance LPG vaporization to reduce the amount of energy, greenhouse gas emissions and the expense of operation
• Vortex tube can provide a reduction (eg 10-15% depending on ambient air temperature) in fuel required for LPG vaporization
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Conclusion
• Discussion