A double pipe heat exchanger is equipment made up of double tubes where one has a hot fluid and another has cold fluid.
There are fins attached to the outside of double tubes which increase the surface area available for heat transfer by improving convection heat transfer.
Both fluids can either be gasses or liquids, but it does not matter whether they are different fluids or the same fluids.
One fluid flows inside double tubes while the other flow above double tubes.
It serves as a means to transport thermal energy from one point to another point within a system with minimum loss.
Heat exchangers are classified into various types based on their design and applications.
Their main objective is to increase the thermal efficiency of a system by minimizing entropy generation with maximum heat transfer area.
Why would you use one
There are various reasons for using double tube double pipe heat exchangers in various industries.
Some of them are
1) It is easy to install a double tube double pipe heat exchanger
2) No need to use additional equipment’s like pumps & valves
3) The double tube double pipes are available at very affordable prices when compared with other types of double tubes.
The vertical radiator is a common choice for heating and cooling systems.
They are versatile, with many different mounting options available to fit any need.
Horizontal when the process isn’t too hot or hazardous, hanging from ceilings in industrial settings.
Where there’s limited space between supports; they also come in sticking out of wall types.
If required double tube heat exchanger can be used in a vertical position if the process is extremely hot.
5) It has more surface area for heat transfer.
6) double-tube double pipe heat exchanger can be used in plant-like sugar, chemical, pharmaceuticals, etc.
7) if the double tube double pipe heat exchanger is made up of metal.
It can withstand high pressure & temperature because metals don’t fail unless the temperature goes beyond the melting point.
And if the double tube heat exchanger is made up of plastic double tube double pipe heat exchanger can bear mild pressure & temperature.
8) Heat exchanger contains fins to increase the surface area available for heat transfer.
The double tubes are arranged in two rows so that one hot fluid enters the bottom of the first row.
Similarly, cold fluid will enter the top of the double tube double pipe heat exchanger from one side and it will leave.
In this way, two fluids can be used for heating & cooling purpose at the same time to increase efficiency.
Advantages of double pipe heat exchanger
There is an increased area of heat transfer because double tubes have a double area for convection.
As a result, it can be used where reduced size and weight are required.
Because double tubes need less space than shell and tube exchangers with the same thermal duty.
It allows installation in equipment that is difficult to get double tube heat exchangers into.
This is possible by replacing double tube heat exchangers with double pipe shells, double tube shells.
Which have easy access to installation due to their compact arrangement.
Disadvantages of double pipe heat exchanger
It requires more time for installation because double tubes are relatively long in comparison with double tube-shell exchangers.
A double pipe heat exchanger is equipment made up of double tubes where one has a hot fluid.
There are fins attached to the outside of double tubes which increase the surface area available for heat transfer.
Both fluids can either be gasses or liquids, but it does not matter whether they are different fluids.
One fluid flows inside double tubes while the other flow above double tubes.
It serves as a means to transport thermal energy from one point to another point within a system with minimum loss.
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