Vortex Tube Refrigerator Apparatus From compressed air at ambient temperature and a high speed rotating vortex, the unit produces air temperatures down to -20Â °C, can perform 75 watts of cooling and discharges a hot air stream at up to 70Â °C.
The Vortex Tube Refrigerator Apparatus is a fully instrumented bench top Vortex Tube Refrigerator Apparatus having no moving parts and requiring only a compressed air or other suitable gas supply to operate.
For clinical laboratory applications. Used to ensure thorough and vigorous mixing of samples and reagents.
....
The product consists of a transparent vessel on a support frame, which mounts on a DigitalHydraulic Bench. A low-voltage, variable-speed motor rotates the vessel aboutits vertical axis. The Vortex Apparatus enables students to produce both freeand forced vortices, and measure the vortex water surface profile. To produce a forced vortex, studentsadd water to the rotating vessel until it is about half full. A forced vortexforms. After a few minutes the vortex becomes constant, and students canmeasure the surface profile using the traverse probe. A speed-control unit (included), sited away from the mainapparatus, controls the speed of rotation. Students can also measure distribution of total head by replacing the traverseprobe with a Pitot tube. The traverse probe canmove both horizontally and vertically, and both axes have linear scales.
....
Vortex and/or Multivortex
....
The profile of the vortex formed at the top of the vessel is determined by a gauge, housed on a diametrically mounted bridge piece, which measures the diameter of the vortex at various depths. Free and Forced Vortex Unit for the study of the shape of 'free and forced vortices' consists of a 250 mm diameter cylindrical, transparent vessel 180 mm depth, having two pairs of diametrically opposed inlet tubes of 9.0 mm and 12.5 mm diameter. The 12.5 mm diameter inlet tubes which are angled at 15° to the diameter, so that a swirling motion is imparted to the liquid entering the vessel, are used as entry tubes for the free vortex experiment. The input water from these tubes impinges on a simple two blade paddle which acts as a stirrer/flow straightener. The water 'leaves' the vessel via the 12.5 mm diameter angled tubes which are used as the 'entry' tubes for the free vortex experiment. The two bladed paddle rotates on a vertical shaft supported by a bushed plug, in the hole used as the outlet for the free vortex experiment, and located at the top by a suitable hole in the bridge piece fitting across the diameter of the vessel. A smooth outlet is centrally positioned in the base of the vessel and a set of push-in orifices of 24, 16, 12 and 8 mm diameter is supplied to reduce the outlet diameter to a suitable value. This gives the co-ordinate points required to plot the vortex profile. The forced vortex is created in the vessel described above by using as the inlet the 9 mm bore tubes which are angled at 60° to the diameter. This bridge piece also houses the probes required to determine the co-ordinates of the vortex profile to be measured.
....
Main metallic elements in stainless steel.
Diagram in the front panel with similar distribution to the elements in the real unit.
Bench-top unit.
Anodized aluminum frame and panels of painted steel.
The experimental unit generates cold and hot air with the aid of ordinary compressed air. A vortex cooling device does not have any moving parts, is maintenance-free and immediately ready for operation. The vortex cooling device is used for the convective cooling of high-speed tools, the air conditioning of protection suits and the cooling of switch cabinets. The central element of the experimental unit is a vortex cooling device also known as a vortex tube. In the vortex tube the tangentially incoming compressed air is moved in rapid rotation. It is particularly suited for use in explosive environments. One benefit here is that the vortex cooling device does not require an electric power supply. This creates a cold and hot air flow in the vortex tube which leaves the vortex tube at opposite ends.
....
High-visibility unilens provides maximum field of vision
A soft nose bridge and rubber-tipped side arms offer a comfortable grip.
Exceptional protection and style.
Transparent tank allows visualisation of vortex formation
Two nozzles for tangential water supply (forced vortex)
Generation and investigation of vortices
Impeller for generating a forced vortex
Point gauges detect the surface profile
Two nozzles for radial water supply (free vortex)
Different inserts for the water drain to generate free vortex.
The apparatus includes a clear acrylic cylinder on a plinth developed to produce & measure free and forced vortices.
The forced vortex is induced by a paddle in the base of the cylinder which is rotated by jets of water. The profile of the forced vortex is determined using a series of depth gauges.
The free vortex is generated by water discharging through an interchangeable orifice in the base of the cylinder and the resulting profile is measured using a combined caliper and depth scale.
Dye crystals (not supplied) may be used to demonstrate secondary flow at the base of the free vortex
Velocity at any point in the free or forced vortices may be measured using the appropriate pitot tube supplied.
