How is finned tube area calculated?
How is finned tube area calculated?
- The area of the outside surface per 1 m of the tube length is calculated: A 1 = A r 1 + A t 1 = 1.219 + 0.0645 = 1.284 m 2 .
- The total surface area of the finning-carrying tube per 1 m of the tube length is calculated:
- The area of the inside surface per 1 m of the tube length is shown:
How do you calculate fin area?
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- The fin efficiency is defined as the ratio of the heat transfer to the fin to the heat transfer to an ideal fin. ηth =
- qfin. hAfin(Tb − T∞) , Tf = T∞,and Afin = 2Ac + Atip (Square and Recatngular ) 1.35.
- Atip = t × W. Fig. 2.4. Rectangular Fin. For cylindrical: Afin = πDL +
What is fin efficiency formula?
The fin efficiency is defined by the division of the actual by the theoretical heat transfer, that is, (9.35) The actual heat flow through the fin is. (9.36) The actual heat flow is calculated by multiplying the fin outer surface area by the fin efficiency.
What is finning on tubes?
They are a series of tubes where fins have been added on the outside to increase the contact area with the outside fluid, to exchange heat and between the fluid inside the tube and the fluid outside the tube.
What is fin and tube heat exchanger?
Tube Fin Heat Exchangers, also called finned coil heat exchangers, consist of tubes that pass through a dense fin stack that is mechanically supported by a mounting frame. Fluid passes through the tube coils, conducts heat to the fins and dissipates heat to air forced through the heat exchanger.
How do you calculate the number of tubes in an evaporator?
Number of tubes (N ): Number of tubes = Heating surface / π x Dm x L. The thickness of the tube generally take for juice heaters and for evaporator 18G and for pans take 16G.
Where are fins used?
Uses. Fins are most commonly used in heat exchanging devices such as radiators in cars, computer CPU heatsinks, and heat exchangers in power plants. They are also used in newer technology such as hydrogen fuel cells.
What is fin performance?
Fin performance can also be characterized by fin efficiency. This is the ratio of the fin heat transfer rate to the heat transfer rate of the fin if the entire fin were at the base temperature, in this equation is equal to the surface area of the fin.
What is gilled tube?
Gilled tubes (also known as finned tubes) are central to the heating or cooling of liquids and gases across many industries. With a larger surface area than plain tubes, gilled tubes enable more compact designs.
What is the use of fin in heat exchanger?
Fins are thus used whenever the available surface area is found insufficient to transfer required quantity of heat with available temperature gradient and heat transfer coefficient. In the case of fins the direction of heat transfer by convection is perpendicular to the direction of conduction heat flow.
