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Vortex Tubes || Vortex Tubes are available in a wide range of sizes to meet the needs of many process and spot cooling applications. Vortex Tubes offer cooling capacities beyond those available from our Cold Air Guns.
Features:
Vortex Tube Phenomenon The vortex tube was discovered in 1930 by French physicist Georges Ranque. Vortec was the first company to develop this phenomenon into practical, effective cooling solutions for industrial applications. Here's how it works.
Fluid that rotates about an axis -- like a tornado -- is called a vortex. A vortex tube creates a vortex from compressed air and separates it into two air streams -- one hot and one cold. Compressed air enters a cylindrical generator which is proportionately larger than the hot (long) tube where it causes the air to rotate. Then, the rotating air is forced down the inner walls of the hot tube at speeds reaching 1,000,000 rpm. At the end of the hot tube, a small portion of this air exits through a needle valve as hot air exhaust. The remaining air is forced back through the center of the incoming air stream at a slower speed. The heat in the slower moving air is transferred to the faster moving incoming air. This super-cooled air flows through the center of the generator and exits through the cold air exhaust port.
Choose one of our Cold Air Guns for quick, easy installation or the model from our complete vortex tube line that best fits the specific needs of your application.
* Airflow temperature can be dropped up to an additional 20° F (11° C). Colder airflow temperatures are produced by adjusting the needle valve to increase the hot airflow. The needle valve is located in the hot exhaust. Vortex Tubes produce less airflow at colder temperatures and have less BTUH (kcal/H) capacity.
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link to Vortex Tubes Dimension Page
Accessories:
Model 610 Adjustable Cold Air Gun The Model 610 Adjustable Cold Air Gun is ideal for use in machining applications and for cooling parts and industrial processes. Model 610's adjustable feature allows you to set the cold airflow rate (BTUH) at optimum levels for your application. The Adjustable Cold Air Gun's maximum temperature drop is 100° F (55.6° C) below inlet air temperature and the maximum cooling capacity is 1500 BTUH (378 kcal/H). Model 610's compressed air supply requirement is 15 SCFM (425 SLPM) at 100 PSIG (6.9 Bar).
Model 610 comes complete with a flexible nozzle for directing cold air and a magnetic base for quick, easy installation and use.
link to Cold Air Gun VOR.610 detailed Page
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Needle Cooler Watch your piece rate jump with ITW Vortec's Model 424 Thread Guard®. The Thread Guard delivers a continuous stream of cold air onto the sewing machine needle to virtually eliminate downtime caused by needle breakage and thread burning caused by overheating. It's effective even in the most challenging sewing operations including belt loops and tough materials. Cooling also prevents holes caused by hot needles burning synthetic fabrics. Model 424's compressed air supply requirement is 4 SCFM (113 SLPM) at 100 PSIG (6.9 Bar).
link to Model VOR.424 Thread Guard® detailed Page
VOR.609 Adjustable Hot Air Gun Spot Heating Systems Use filtered compressed air to produce air temperatures up to 250°F (121°C) for spot preheating of parts & processes. Intrinsically safe, it is ideal when moderate heat levels are required for applications including preheating and softening
link to Model VOR.609 Hot Air Gun detailed Page
Operation Any fluid that flows and rotates about an axis such as a tornado, is called a vortex. A vortex tube creates a vortex and separates it into two air streams-one hot and one cold. Figure 1 shows how a vortex tube works. Compressed air enters a cylindrical generator which is proportionately larger than the hot (long) tube. The generator causes the air to spiral. The spiraling air is forced down the inner walls of the hot tube at speeds reaching 1,000,000 rpm. At the end of the hot tube, a small portion of this air exits through a needle valve as hot air. The remaining air is forced back through the center of the incoming air stream but at a slower speed. The heat in slower moving air is transferred to the faster moving incoming air. This super-cooled air flows through the center of the generator and exits through the cold air exhaust port. Temperature Separation Effects The Vortex Tube Creates two types of vortices: free and forced. In a free vortex (like a whirlpool) the angular velocity of a fluid particle increases as it moves toward the Center of the vortex-that is, the closer a particle of fluid is to the center of a vortex, the faster it rotates. In a forced vortex, the velocity is directly, proportional to the radius of the vortex-the closer the center, the slower the velocity. In a vortex tube, the outer (hot) air stream is a free vortex. The inner (cold) air stream is a forced vortex. The rotational movement of the forced vortex is controlled by the free vortex (hot air stream). The turbulence of both the hot and cold air streams cause the layers to be locked together in a single, rotational mass. The inner air stream flows through the hollow core of the outer air stream at a slower velocity than the outer air stream. Since the energy is proportional to the square of the velocity, the cold air stream loses its energy by heat transfer. This allows energy to flow from the inner air stream to the outer air stream as heat creating a cold inner air stream. Cold Fraction The percentage of total input air volume released through the cold air exhaust of a Vortex Tube is called the Cold Fraction. A valve located in the hot air exhaust of the Vortex Tube controls the Cold Fraction. For example, if the total compressed air input is 15 SCFM (424.5 SLPM) and the Cold Fraction is 70%, the amount of air exiting the cold end wilt be 10.5 SCFM (297.2 SLPM); 4.5 SCFM (127.4 SLPM) exits the hot end. Cold Fractions of 60-80% produce maximum efficiency-greatest power (BTUH) output- and are ideal for cooling machining operations, electrical controls and enclosures, liquid baths and workers. Low Cold Fractions (less than 50%) have reduced airflows and produce the lowest temperatures for cooling glass, laboratory experiments and for testing electronic components.
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