Vortex cooler

Fabrics that inhibit moisture loss may eliminate evaporation as a means of heat loss when the air inside the fabric becomes saturated with moisture. Equipment, such as vortex coolers and water-cooled helmets or underwear can remove heat from the microclimate inside some types of clothing assemblies. 

There are also vortex coolers. Compressed air passes from a tube or pipe into a chamber that causes the air to spin in a vortex. The temperature of the air along the outer surface of the vortex drops as a result of rotation. Bleeding off the outer air can provide a significant amount of cooling capacity with little cost. 

A pump circulates cool dry air throughout the suit or portions of it via an air line. Cooling may be enhanced by use of a vortex cooler, refrigeration coils, or a heat exchanger. generated by worker activity, the equipment, or the environment. (1) Pumps circulating cool air require 10 to 20 ft (0.3 to 0.6 m ) of respirable air per minute, so they are often uneconomical for use at a waste site... 

Figure 34 A typical NEMA 4X process enclosure used for a Raman analyzer picture of the enclosure showing the location of the control PC, a vortex cooler, and an easy serviceable analyzer utilizing a two-removal-tray construction. (Reproduced with permission from Kaiser Optical Systems, Inc.)...

Vortex coolers operate by injecting compressed air tangentially into a specially designed tube. The air forms a vortex, rotating at speeds approaching 1,000,000 rpm. The portion of the vortex closest to the outer wall of the tube moves axially upward, where the inner part of the vortex moves in the opposite direction (Fig. 35). In this design, energy (heat) is transferred from the inner vortex to the outer. Valves are positioned at the ends of the tube to bleed off hot air from the outer vortex (which is vented outside the enclosure) and cool air from the inner vortex (which is directed into the enclosure). 

In a direct-current plasma source (DCP) initial heating of an inert gas, usually argon, is produced by a dc-arc. Experimentally it is arranged for the plasma to be established in a high-velocity gas stream. When the edges of the plasma are cooled with an inert gas vortex, the cooler outer parts have... 

Refrigerators coolers (vapor-compression, vortex, thermoacoustic, thermoelectric/Peltier)... 

During testing in the glass furnace environment, the detector assembly was cooled using a vortex tube cooler, with an adjustable air flow rate, in order to minimize the temperature excursions. Additionally, the temperature of the detector assembly was measured and documented for later use in data reduction. A statistical analysis of all calibration data including the temperature dependence of the detectors reveals an estimated uncertainty in measured temperature of +2% of the total measured absolute temperature. 

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