What is a double pipe heat exchanger used for?

Double-pipe heat exchangers are used in many industries because of their low design and maintenance costs, flexibility, and low installation costs [25]. They are mainly used for sensible heating or cooling of process fluids in applications of small heat transfer areas of up to 50 m2 [38].

What is double heat exchanger?

DOUBLE PIPE HEAT EXCHANGER. A double pipe exchanger consists of one or more pipes or tubes inside a pipe shell. Basically two straight pipe lengths are connected at one end to form a U or “hair-pin.” Longitudinal fins may be used on the outside of the inner tube.

What is the work of heat exchanger?

Heat exchangers, metal shells and tubes, work by transferring heat from one place to another. When a furnace burns natural gas or propane fuel, its exhaust/combustion by-products (also known as flue gas) enter and travel through the heat exchanger.

What are the characteristics of double pipe heat exchanger?

It consists of concentric pipes separated by mechanical closures. Inexpensive, rugged and easily maintained, they are primarily adapted to high-temperature, high-pressure applications due to their relatively small diameters. Double pipe heat exchangers have a simple construction.

Where would you use shell and tube double pipe heat exchangers?

When to use double pipe heat exchanger and shell and tube heat exchanger? Double pipe heat exchangers are used when the heat transfer area is small say up to 14 m2. If we connect them in series to increase the heat transfer area it will require much space as well the pressure drop will be higher due to more fittings.

What is the difference between double pipe and shell and tube heat exchanger?

Double pipe heat exchanger consists of two concentric pipes of different diameters. One pipe is for hot fluid and another is for cold fluid. Shell and tube heat exchanger consists of a shell in which large number of parallel tubes are present. One fluid hot or cold flow in shell and other hot or cold flow in the tubes.

How does shell and tube heat exchanger work?

As its name implies, this type of heat exchanger consists of a shell (a large pressure vessel) with a bundle of tubes inside it. One fluid runs through the tubes, and another fluid flows over the tubes (through the shell) to transfer heat between the two fluids.

What does double the pipe mean?

The double pipe operator (||) is the logical OR operator . In most languages it works the following way: If the first value is false, it checks the second value. If it’s true, it returns true and if it’s false, it returns false. If the first value is true, it always returns true, no matter what the second value is.

What are practical applications of double pipe heat exchanger?

The double pipe heat exchanger is a small, modular design that is most useful in applications where conventional shell and tube exchangers are too large or too expensive to use. Double pipe exchangers can be paired in series or in parallel to increase the heat transfer rate through a system without complication.

Should I replace heat exchanger?

There are only two options if a Heat Exchanger is bad: Replace the heat exchanger or replace the furnace. If the heat exchanger is under warranty, this option is a good way to go unless it is unavailable in the time frame needed, which can be immediate in cold weather.

What exactly does a heat exchanger do?

A heat exchanger is a device designed to efficiently transfer or “exchange” heat from one matter to another. When a fluid is used to transfer heat, the fluid could be a liquid, such as water or oil, or could be moving air. The most well known type of heat exchanger is a car radiator.

What is the purpose of the heat exchanger?

The general function of a heat exchanger is to transfer heat from one fluid to another. The basic component of a heat exchanger can be viewed as a tube with one fluid running through it and another fluid flowing by on the outside.

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