Contents
- 1 Which fluid should be allocated to tube side in shell and tube exchanger?
- 2 What factors are involve in fluid allocation in shell and tube heat exchanger?
- 3 What is the advantage of a shell and tube heat exchanger over a double pipe heat exchanger?
- 4 What are the types of baffles exist for a shell and tube heat exchanger?
- 5 How does fluid allocation work in a heat exchanger?
- 6 When to use shellside or tubeside heat exchanger fluid?
Which fluid should be allocated to tube side in shell and tube exchanger?
corrosive fluid
Put a corrosive fluid on the tube side. That way, only the tubes, tubesheets, heads and channels will need expensive corrosion-resistant alloys. In contrast, a corrosive fluid on the shell side requires the entire exchanger to use the materials. Low pressure drop.
How do you decide which fluid goes in the tubes shell of a heat exchanger?
For example, in Shell and Tube heat exchangers, it is better to choose whichever fluid appears higher in the following list to pass inside tubes:
- Cooling water,
- Corrosive fluid,
- A fluid which is fouling,
- The less viscous of two fluids,
- The fluid under higher pressure,
- The hotter fluid,
What factors are involve in fluid allocation in shell and tube heat exchanger?
Fluids that are or will become vapors inside the heat exchanger should generally be allocated to the shellside because they have a larger volume and a lower heat-transfer coefficient. This will maximize its heat-transfer coefficient and lower the pressure drop.
When a fluid is used in a shell and tube heat exchanger which one of the following is not true?
8. When a fluid is used in a Shell and Tube heat exchanger, which one of the following is not true? Explanation: Fins are generally used to increase the Heat transfer Area when the heat transfer coefficient on that fluid side is comparatively low.
What is the advantage of a shell and tube heat exchanger over a double pipe heat exchanger?
The advantage is it is simple to construct and easy to operate. However, in shell and tube HE, we can pack a large heat transfer area within a small volume. As the numbers of tubes are more in a shell and tube HE, we can expect a higher turbulence which will result in higher heat transfer rates.
How many times do we calculate for pressure drop in a shell and tube heat exchanger Mcq?
4. How many times do we have to calculate for Pressure drop in a Shell and Tube Heat Exchanger? Explanation: For a Shell and Tube HE, we have to calculate pressure drop twice, once for the tube to check whether the equipment can handle that pressure. Similarly, the second time for the shell side.
What are the types of baffles exist for a shell and tube heat exchanger?
Explanation: There exist only three possible baffles to be used in a shell and tube heat exchanger which are Orifice baffle, segmental baffle and doughnut baffle.
Why is viscous fluid on the shell side?
When more viscous fluid is kept on the shell side, the increased turbulence will result in increased heat transfer coefficient and improved overall heat transfer. Fluid with higher flow rate is generally preferred to be kept on the shell side.
How does fluid allocation work in a heat exchanger?
But each time when you design for a new shell and tube heat exchanger, you will need to decide where the hot / cold fluid streams must be places. Which should go through shellside and which will go through the tubes. This decision is commonly referred to as fluid allocation for the shell & tube heat exchanger.
Where does heat transfer occur in a shell and tube exchanger?
Correspondingly, we have 2 distinct spaces in a shell and tube exchanger – shell side and tube side. The hot of the cold fluids are passed through these spaces, each one through either the shell or tube side. And then heat transfer occurs between the two fluids.
When to use shellside or tubeside heat exchanger fluid?
Thermal expansion problems may govern selection of fluid for tube-side and shell-side. (i.e. if fluid temperature change is > 150°C (300°F) then normally you would put it in the shells-side which can better handle large temperature change in certain exchanger designs)
Why are tubes used in a heat exchanger?
Tubes facilitate a streamlined flow, lower turbulence. They can allow flow with lower pressure drop. Mechanical cleaning of the tube bundle from inside. Considering these important features of the tube bundle in an exchanger, following fluid services are better suited for the tube side.