Technology

WHAT ARE HAIRPIN HEAT EXCHANGERS?

HAIRPIN HEAT EXCHANGERS are the latest advancement in the field of thermal power engineering.

And so many Steam Power Plants have been equipped with Hairpin Heat Exchangers for this purpose.

The principle of heat transfer is based on coiling a tube around another tube.

Heating one coil while cooling the other, causing water or steam to pass through them. 

During World War II, the British Admiralty Laboratories used this principle to develop high-pressure boilers.

ADVANTAGES HAIRPIN HEAT EXCHANGERS

  • In order to overcome the weight restrictions imposed by their size, engineers have developed a new method for heating large buildings.
  • This involves wrapping coils around another pipe which reduces their diameter and volume so as to increase heat transfer surfaces at once!
  • Heated floors can help save you a bundle on your utility bill.
  • The increased surface area greatly decreases how much energy is required from the heating system per square foot.
  • Which means less power spent running those oversized radiators!
  • And this means more comfort in all sorts of spaces: classrooms, offices etcetera
  • As compared to the conventional arrangement of straight-tube coils exposed directly to the fire, the present arrangement prevents the escape of superheat from feed heater and economizer outlets thru boiler walls. 
  • The Hairpin Coil Heat Exchanger is a revolutionary new design that can be used in both water heater and heat pump applications.
  • It’s small size, high efficiency rate, long service life are just some of its many advantages!
  • It has the advantages of being inexpensive, easy to install with short feedwater headers for high superheat operation.
  • Which avoid chilling – making this an ideal solution when it comes time for you next upgrade your home’s heating system!

DISADVANTAGES HAIRPIN HEAT EXCHANGERS

  • There is no furnace casing for this equipment;
  • Tubes are exposed to high temperatures and the smoke from firebox.
  • This makes them vulnerable to erosion and corrosion if not properly treated during design/construction.
  • As a result, service life could be less than that of conventional heat exchangers.
  • This coil heat exchanger arrangement is expensive as compared to an arrangement.
  • Tube coils are welded or riveted into a shell with furnace casings around it.
  • This creates the perfect environment for heat transfer, insulation and durability!
  • In the case of heat exchangers with tall water headers, differential pressure will be considerably high.
  • This results in reduced efficiency of the heat transfer process.
  • To ensure that the material won’tcorrode at elevated temperatures, it must beof sufficient strength and resistance.
  • Often stainless steelis used for this purpose because of its durability in hot environments.
  • Like thesehighwaysides or by riversides where corrosion typically occurs.

BEST FEATURES OF HAIRPIN HEAT EXCHANGERS

  • Hairpin coils are an efficient yet simple way to transfer heat.
  • The Coiled Tube line offers a variety of sizes, and the smallest ones will work well for low pressure or medium temperature applications.
  • Coil Tubes come in different shapes with varying efficiencies at handling fluids – so be sure to find one that’s right for you!
  • Larger coiled tube furnaces serve high-pressure purposes effectively!
  • The unique shape of this type manufacturer’s device allows them remain ice free no matter what temperature is outside – even close to freezing point!
  • This improves the overall performance of the plant considerably, especially when combined with an Organic Rankine Cycle or an Accelerator Reactor Steam Power Plant.
  • Which increases flexibility in locating these exchangers wherever required within the plant layout. 
  • These equipment have good resistance to corrosion because of their location away from the firebox and flue gas path at higher temperatures.
  • Because there are multiple paths for steam to pass through. This reduces the risk of boiler trips due to just one tube failure.

ALLOY TYPE TUBING MATERIAL USED IN HAIRPIN HEAT EXCHANGERS

Over the recent years, manufacturers have introduced high-strength stainless steel alloy tubing materials.

Which are especially suitable for high-pressure applications (up to 100 atm.).

Where most conventional tubes fail within the specified time period.

The most common application for Alloy 20CB 3 is on external surfaces.

For those who work outside in harsh environments and need protection from the elements – this alloy makes a perfect choice!

OVERVIEW:

The Hairpin Coil heat exchanger is a type of high-efficiency, thermodynamic solution that consists primarily of coils.

This device works as an economical and efficient way to solve problems faced by thermal engineers.

When designing large steam generators or turbines because it offers more surface area per unit length.

Than straight tube sheets can do in cases where volumetric efficiency needs optimization over specific dimensions like circumference height.

 

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