NON FREEZE VORTEX TUBE
It is understood that the benefits of the vortex technology become greater when the Vortex Tube operates as a primarily pressure regulator in the process that requires gas pressure reduction. In this case the vortex cooling and heating is generated at no cost at all. Keeping this in mind it is no wonder the most of the VT's based products and applications developed by UVI are related to natural gas pressure regulation.
To secure natural gas (and any non- dried gas) non freeze pressure reduction in a vortex tube and, thus, to eliminate the need in the VT feed pre-heat, the unique Self-Heating design has been developed (USA and Foreign Patents).
The Dual Flow Vortex Tube
The Dual Flow Vortex Tube (VT) is a specially designed cylindrical device with no moving parts. In the Vortex Tube a high pressure gas expands in the unit’s tangential inlet nozzles down to the delivery pressure. While in the VT’s cylindrical part, the rotating low-pressure gas undergoes energy division (vortex phenomenon), forming two currents: the cold that is located in the VT’s center and the hot at the unit’s periphery, close to the VT’s walls. The cold and the hot currents exit the VT separately as the cold and the hot outlets.
In the proprietary Universal Vortex’ Self-Heating VT the generated hot gas prior to exiting the VT is used to warm the unit inlet nozzles (spot heating) thus eliminating the likelihood of depressurizing gas freezing (self-heating provision).
Intensity of the vortex energy division depends on ratio of the VT inlet and outlet pressures and is not affected by the gas flow rate through the unit. The actual temperatures of the VT cold and hot outlet are expressed as follow:
T cold =T inlet - ∆T Joule-Thomson - ∆ T (vortex, cold); T hot=T inlet- ∆T Joule-Thomson + ∆ T (vortex, hot). Intensity of vortex energy division in the VT (∆T vortex) is, roughly, proportional to ratio of inlet to outlet gas pressure. A valve at the VT outlet is used to set a desirable ratio between the VT cold and hot outputs.
Non Freeze pressure reduction of non pre-heated gas with the subsequent temperature increase of the pressure regulated gas without applying any man-made energy: Pipeline Pressure Regulation Stations, Pressure To Power Technologies, Fuel gas conditioning at Power Plants, Vortex Cooling System for CNG compression (Daughter Tank Refill), LNG Feed Precool, Well Head Gas Conditioning.
The Single Flow Vortex Tube
In the Single Flow VT high pressure gas expands in the unit’s tangential nozzle of a fixed size down to the delivery pressure. While in the VPR’s cylindrical body, the rotating low-pressure gas undergoes energy division (vortex phenomenon), forming two currents: cold and hot. The currents coexist in the VPR and exit the unit through a single discharge orifice. Prior to exiting the VPR, the hottest portion of the hot flow is internally directed to warm up the unit’s inlet nozzle (self-heating provision), thus protecting the inlet depressurized flow from a freeze up. The vortex cold and the hot flows recombining at the VPR discharge negate their temperature differences. Therefore, the temperature of the combined flow at the VPR single discharge reflects only the Joule Thomson temperature drop in the expanded gas.
The Single Flow Vortex Tube provides for the most intensive energy division in the vortex flow and accordingly for the most effective spot heating
Non Freeze pressure reduction of non pre-heated gas with the subsequent temperature increase of the pressure regulated gas without applying any man made energy:
CNG decompression, Vortex Pilot Gas Heater, Vortex Farm Tap installations, Vortex Cooling System for CNG compression (Daughter Tank Refill); Heavy Hydrocarbons Recovery from wellhead gas, Vortex Gas Sample Heater
Noise. The noise in the UVI designed Vortex Tubes has never been an issue during the unit’s usage at pressure regulation facilities. The VT’s low noise performance is caused by a spiral trajectory of the gas depressurized in the Vortex Tube versus a one dimensional movement that is typical for the gas flow expanding in any pressure regulator. As a result the Vortex Tube (in the VPGH, VPR, One Flow VT or Counter Flow VT configuration) produces much less noise than any equally sized pressure regulator.