Ljungström air preheater is an
air preheater
An air preheater is any device designed to heat air before another process (for example, combustion in a boiler With the primary objective of increasing the thermal efficiency of the process. They may be used alone or to replace a recuperative ...
invented by the Swedish engineer
Fredrik Ljungström
Fredrik Ljungström (16 June 1875 – 18 February 1964) was a Swedish engineer, technical designer, and industrialist.
Considered one of the foremost inventors of Sweden, Fredrik Ljungström accounted for hundreds of technical patents a ...
(1875-1964). The patent was achieved in 1930.
Even in a modern utility boiler the preheater provides up to 20 percent of the total heat transfer in the boiler process, but only represents two percent of the investment.
The factory and workshop activities and laboratories in Lidingö would remain throughout the 1920s, with some 70 personnel. In the 1930s it was used as a film studio, and was finally demolished in the 1970s to give space for new industry premises.
Fredrik Ljungström's technology of the air preheater is implemented in a vast number of modern
power station
A power station, also referred to as a power plant and sometimes generating station or generating plant, is an industrial facility for the generation of electric power. Power stations are generally connected to an electrical grid.
Many ...
s around the world until this day, with total attributed worldwide
fuel savings estimated at 4,960,000,000
ton
Ton is the name of any one of several units of measure. It has a long history and has acquired several meanings and uses.
Mainly it describes units of weight. Confusion can arise because ''ton'' can mean
* the long ton, which is 2,240 pounds
...
s of
oil
An oil is any nonpolar chemical substance that is composed primarily of hydrocarbons and is hydrophobic (does not mix with water) & lipophilic (mixes with other oils). Oils are usually flammable and surface active. Most oils are unsaturated ...
, "few inventions have been as successful in saving fuel as the Ljungström Air Preheater".
In 1995, the Ljungström air preheater was distinguished as the 44th
International Historic Mechanical Engineering Landmark by the
American Society of Mechanical Engineers.
References
External links
History of the Ljungström Air PreheaterLJUNGSTRÖM Air Preheater (APH) & Gas-gas Heater (GGH) Power Plant Overview
Chemical equipment
Mechanical engineering
Power station technology
Engineering thermodynamics
Ljungström
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