What is the main disadvantage of double pipe heat exchanger over the shell & tube, heat exchanger?
The disadvantage of the double-pipe heat exchanger is that it covers a large area. At the same time, the metal consumption per unit heat transfer area is much, about 5 times that of the shell-and-tube heat exchanger.
What is the working principle of double pipe heat exchanger?
The double pipe heat exchanger works via conduction, where the heat from one flow is transferred through the inner pipe wall, which is made of a conductive material such as steel or aluminum. The double pipe heat exchanger is often used in counterflow, where its fluids move in opposite directions (as shown above).
Which is more efficient shell-and-tube heat exchangers or double pipe exchangers?
The increment in heat transfer coefficient was determined for both cases and compared. It was found that the increment in heat transfer performance in shell and tube heat exchanger is better in comparison to double pipe heat exchanger.
Is double pipe heat exchanger same as shell and tube?
The correct answer is: The double-pipe and the 1–1 (1 shell pass-1 tube pass) shell-and-tube heat exchangers have the same effectiveness, since both are essentially counterflow.
What are the advantages of heat exchangers?
3 Important Benefits of Using Heat Exchangers
- Smaller Spatial Footprint. With the advancement of modern technology, it seems that more powerful also means smaller; smaller personal devices, smaller and more versatile manufacturing equipment, and more.
- Lower Environmental Impact.
- Minimal Operating Costs.
How do you calculate the heat transfer area of a double pipe heat exchanger?
(Pr) number for each stream. For first iteration a Length of double pipe exchanger is assumed and heat transfer coefficient is calculated. Viscosity correction factor (μ / μw)0.14 due to wall temperature is considered 1. For Laminar Flow (Re <= 2300), Seider Tate equation is used.
What is the difference between double pipe heat exchanger and shell and tube heat exchanger?
One fluid hot or cold flow in shell and other hot or cold flow in the tubes. Also in case of shell & tube(S) the hot fluid will have more turbulence than in double pipe heat exchanger (HE) since there are no of tubes within a shell the area for convective heat transfer is considerably increased.
Which heat exchanger is more efficient?
Plate exchanger
Plate exchanger is the most efficient due to turbulent flow on both sides. High heat-transfer coefficient and high turbulence due to even flow distribution are important. However, a plate heat exchanger regenerator is restricted to low viscosities. With high viscosities, a special tubular may be required.
What are advantages and disadvantages of heat transfer?
What are the advantages and disadvantages of conduction? Advantages: Metals and stone are good conductors since they can transfer heat fast, and the metal will heat up your food or cook it faster. Disadvantages: You cannot make a fire really fast because conduction works really poorly with wood, paper, air, and cloth.
How do you increase heat transfer in a double pipe heat exchanger?
Rotation of inner pipe of the double pipe heat exchanger enhances the heat transfer rate and the performance of the heat exchanger especially at low Reynolds number.
Which pipe is more efficient in terms of heat transfer?
A loop heat pipe (LHP) is a passive two-phase transfer device related to the heat pipe. It can carry higher power over longer distances by having co-current liquid and vapor flow, in contrast to the counter-current flow in a heat pipe.
What are the 2 two types of heat exchanger?
Plate Heat Exchanger Or Gasket Plate Heat Exchanger.
What are the benefits of a double pipe heat exchanger?
The main benefits of double pipe heat exchangers are listed below: You can provide good efficiency with lower capital costs. They are small compared to the shell and tube and do not need much space for maintenance, while the heat transfer is acceptable.
What is the best book on double pipe heat exchanger?
Williams, J. B., Thomas W & Dong-Hoon H. (2002). Double Pipe Heat Exchanger, 1 st edition, Project No. 1H Laboratory Manual, USA: Robert Cox MEB3520 Coulson, J.M., Richardson, J.F & Sinnot, R.K. (2009).
Can a double-pipe helical heat exchanger be numerically modeled?
A double-pipe helical heat exchanger was numerically modeled for laminar fluid flow and heat transfer characteristics under different fluid flow rates and tube sizes. Two different tube diameters were used. The overall heat transfer coefficients were calculated for both parallel flow and counterflow.
What is the mass flow rate of a double pipe heat exchanger?
Here standardized the new fabricated double pipe heat exchanger using Wilson plot and found out the value of constant ‘K’ for mass flow rate range between 0.02 Kg/sec – 0.033 Kg/sec. … … … … Content may be subject to copyright. Content may be subject to copyright. petrochemical, food, beverage, ther mal etc.