Technology
Bosetech brings you the technology for your unique application. We believe in understanding the customer’s needs and providing a custom fit solution. When it comes to solving problems, our flexible approach ensures that your requirements will be met.
Heat Transfer
Finned Tubes
What are fin tubes?
Fins increase the surface area of an object to increase the rate of heat transfer. In the study of heat transfer, fins are surfaces that extend from an object to increase the rate of heat transfer. The amount of conduction, convection, or radiation of an object determines the amount of heat it transfers. Increasing the convection heat transfer co-efficient or increasing the surface area of the object increases the heat transfer. Thus, adding a fin to an object, increases the surface area and can sometimes be an economical solution to heat transfer problems.
What are Finned Tube Heat Exchangers?
Finned tube heat exchangers are the type of heat exchangers in which fins are attached to the outer tube of the exchanger. Adding fins facilitates the transfer of fluid outside the tube, generally for air or a gas. In a finned tube heat exchanger, an overall flow pattern is often crossflow, but it can also be counterflow or parallel flow. A finned tube is very helpful as one of the fluids is air or any other gas in an air heat exchanger. There is a low air-side heat transfer coefficient, which increases the surface area of heat transfer.
Types of Finned Tubes
Most
common
in heat
rejection
Fin Type
Serrated
Extruded fins
Spiral wound brazed fins
Spiral wound
(L-foot, embedded)
Studded
H-fins
Longitudinal
Applications
High temperature, high pressure, clean environments
Suitable for low dirt applications requiring uniform performance. E.g. refineries
Suitable to high temperature applications, low pressure, clean environment e.g. waste heat recovery
High heat transfer efficiency, stable performance, low corrosion risk
Advantages
Very high heat transfer efficiency
High heat transfer efficiency, stable performance, low corrosion risk
High heat transfer efficiency, low cost
High heat transfer efficiency, stable performance, low corrosion risk
Draw backs
Subject to fouling and catching dirt and soot
Subject to collecting dirt and soot
Subject to fouling and catching dirt and soot
Subject to collecting dirt and soot
-
Static filters come in Simplex and Duplex forms, with various types of closures. They can be cast or welded. Cast filters are primarily used in filtration of water, oil and fuels and available directly from stock. Welded simplex filters were developed for liquid, gaseous and low-viscosity media and can be designed for a pressure of up to 64 bar.
-
During normal filtration, particles accumulate from top to bottom on the inside of the strainer. The cleaning sequence is initiated by a timer setting or alternatively triggered by differential pressure. Standard cleaning cycle trigger is set to 60 minutes. During the pre-flushing phase, the flushing valve opens and particularly larger particles are flushed out.
