Table of Contents
- 1 What flows through shell and tube heat exchanger?
- 2 What is shell side and tube side?
- 3 Why is steam on the shell side?
- 4 What is hot side and cold side in heat exchanger?
- 5 Why shell and tube heat exchanger is used?
- 6 Why do we use shell and tube in heat exchanger?
- 7 Why does the fluid pass from shell side to tube side?
- 8 How is heat transferred from one fluid to the other?
What flows through shell and tube heat exchanger?
A shell and tube exchanger consists of a number of tubes mounted inside a cylindrical shell. Two fluids can exchange heat, one fluid flows over the outside of the tubes while the second fluid flows through the tubes. The fluids can be single or two phase and can flow in a parallel or a cross/counter flow arrangement.
What is shell side and tube side?
Two fluids, of different starting temperatures, flow through the heat exchanger. One flows through the tubes (the tube side) and the other flows outside the tubes but inside the shell (the shell side). In order to transfer heat efficiently, a large heat transfer area should be used, leading to the use of many tubes.
When hot and cold fluid flows in the same direction in heat exchanger then it is called?
operation of heat exchangers This flow arrangement is called parallel flow. Heat is transferred from the warm fluid through the wall of the inner tube (the so-called heating surface) to the cold fluid.
Why is steam on the shell side?
The design is very flexible to meet the strenuous requirements found in steam and condensate systems. Typically, steam is delivered to the shell side and transfers the energy from the steam to the process fluids in the tubes without direct contact or mixing the steam with the fluid.
What is hot side and cold side in heat exchanger?
Temperature program This means the inlet and outlet temperatures of both media in the heat exchanger. T1 = Inlet temperature – hot side. T2 = Outlet temperature – hot side. T3 = Inlet temperature – cold side. T4 = Outlet temperature – cold side.
What is hot fluid in heat exchanger?
On the liquid side of these heat exchangers, the common fluids are water, a water-glycol solution, steam, or a refrigerant. For heating coils, hot water and steam are the most common, and this heated fluid is supplied by boilers, for example. For cooling coils, chilled water and refrigerant are most common.
Why shell and tube heat exchanger is used?
Shell and tube heat exchangers make it possible to pump materials as soon as possible, and they transfer temperatures efficiently so you can ensure the materials are at the necessary temperature without expending extra energy to do so.
Why do we use shell and tube in heat exchanger?
Shell and tube Heat Exchangers have the ability to transfer large amounts of heat in relatively low cost, servicable designs. They can provide large amounts of effective tube surface while minimizing the requirements of floor space, liquid volume and weight.
Why is hot fluid kept in the rubber side of heat exchanger?
In shell & tube heat exchanger, if hot fluid kept in shell then hot fluid transfer the heat to the cold fluid as well as the surrounding atmosphere( insulation provided in heat exchanger but still at high temperature large amount heat transferred) so it decreases it’s efficiency aaje also loss of heat. So, hot fluid always in rubber side.
Why does the fluid pass from shell side to tube side?
For viscous fluids : If the fluid is viscous in nature it should of-course pass from shell side. Due to the presence of baffles velocity of flow increases causes high pressure drop as a result high heat transfer coefficient. If you pass from tube side this tends to have high pressure drop and low heat transfer.
How is heat transferred from one fluid to the other?
Heat is transferred from one fluid to the other through the tube walls, either from tube side to shell side or vice versa. The fluids can be either liquids or gases on either the shell or the tube side. In order to transfer heat efficiently, a large heat transfer area should be used, leading to the use of many tubes.
Do you put cold fluid in the shell or tube?
As pointed out by others, it’s not a good practice to always put cold fluid in the shell. 1- The most general practice is that you calculate the flow areas for both, shell and tube, and put the fluid with higher flow rate in the larger flow area. Otherwise, the pressure drop will shoot up, resulting in a poor design.