How do you find the surface area of a finned tube?
How do you find the surface area of a finned tube?
The total surface area of the finning-carrying tube per 1 m of the tube length is calculated: A rct 1 = π · d · L r = π · 0.028 · 1 = 0.088 m 2 .
How do fins increase surface area?
Fins are extensions on exterior surfaces of objects that increase the rate of heat transfer to or from the object by increasing convection. This is achieved by increasing the surface area of the body, which in turn increases the heat transfer rate by a sufficient degree.
What is finned tubing?
Finned tubes are the main components of heat exchangers. 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.
How are finned tubes made?
It is formed by screwing fin strips made of copper or aluminum into machined grooves and backfilling to secure the lock. Fill the base tube material. Compared with other finned tubes, G type fin tubes are firmer. Therefore, it is widely used in places where high-temperature heat transfer is required.
What is fin equation?
The rate of heat transfer from a solid surface to atmosphere is given by Q = hA ∆ T where, h and ∆T are not controllable. So, to increase the value of Q surface area should be increased. The extended surface which increases the rate of heat transfer is known as fin.
What is finned surface?
In the study of heat transfer, fins are surfaces that extend from an object to increase the rate of heat transfer to or from the environment by increasing convection. The amount of conduction, convection, or radiation of an object determines the amount of heat it transfers.
What is the fin efficiency?
Fin efficiency is defined as the ratio of actual heat flow of the fin to that which would be obtained with a fin of constant temperature uniformly equal to the base surface temperature, that is, one with infinite thermal conductivity.
The surface area of fins per 1 m of the tube length (according to Eq. [2.3]) is shown: A r1 = π 2(D 2 − d 2 + 2Dδ r)Lrs sr z = π 2 (0.0552 − 0.0282 + 2 · 0.055 · 0.0008) 1 0.0031 = 1.219 m 2. The surface area of the carrying tube, not occupied by fins, per 1 m of the length of the finned tube is shown next:
How do you find the surface area of a carrying tube?
The surface area of the carrying tube, not occupied by fins, per 1 m of the length of the finned tube is shown next: A t1 = π · d[L rs(1 − δr sr)z + L t] = π · 0.028[1(1 − 0.0008 0.003)1 + 0] = 0.0645 m 2.
How is the type of finned tube chosen?
The type of finned tube is chosen (ie, the fin type and combination of materials) depending on the specific requirements of each process equipment unit. Commonly, tubes currently have circular cross-section fins.
What is a finned tube heat exchanger?
Igor Pioro, in Handbook for Transversely Finned Tube Heat Exchanger Design, 2016 Finned tubes are the heart of any gas–gas or gas–liquid type of heat exchanger. Finned tube banks are compact units of robust and corrosion-resistant construction.
