Product Description
Three Different Features allow the FIREBAR heater to operate at a lower sheath temperature than a equally powered round tubular element
1. Flat surface geometry
Because of its design and geometry,flat tubular heaters will heat viscous fluids from ambient temperature faster than round tubular elements with the same wattage and at a lower sheath temperature.
The benefit of this shape is the enhanced flow of liquid past the surface of the heating element.The round tubular has a much more erratic flow pattern.The currents swirl around and trap heat next to the sheath due to the round shape.
The flow pattern around the flat tubular heater is streamlined;the flat surface has less restriction on the liquid as it moves up and past the heater sides.The efficient and faster flow pattern permits the liquid to move the heat away from the sheath very quickly;resulting in the flat tubular heater’s lower operating sheath temperature.
2. Greater “buoyancy force”
Natural convection phenomena depends partially upon the ratio of a buoyant force to the viscus force of the heated fluid. This buoyant force,or flow of liquid up and across the heater surface,is primarily determined by the size of the boundary layer of the heater(the sides of the heater).
The boundary layer of a FIREBAR heater is 1 in.(25.4mm),compared to the 0.43 in.(10.9mm)boundary layer of a typical diameter round tubular element.Depending on the material being heated,this creates a buoyancy force up to 10 times greater than a round tubular element.
3. Smaller dimension normal to the flow:
The thin,0.235 in. (5.9mm)dimension of the FIREBAR heater normal to flow reduces the drag force on liquid flowing past the heater.Typical commercial round tubular elements have a 0.43 in. (10.9mm)dimension normal to flow.
A heat pipe is a heat-transfer device that combines the principles of both thermal conductivity and phase transition to effectively transfer heat between two solid interfaces.
At the hot interface of a heat pipe a liquid in contact with a thermally conductive solid surface turns into a vapor by absorbing heat from that surface. The vapor then travels along the heat pipe to the cold interface and condenses back into a liquid – releasing the latent heat. The liquid then returns to the hot interface through either capillary action, centrifugal force, or gravity, and the cycle repeats. Due to the very high heat transfer coefficients for boiling and condensation, heat pipes are highly effective thermal conductors.
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