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What is the comparison between forced circulation and natural circulation boilers?
Natural circulation
Force circulation
1.
In Natural circulation boiler the circulation is done by means of nature.
In Forced circulation Boiler the circulation is done by the means of pumps.
2.
These type boilers are low capacity boilers.
These type boilers are of high capacity boilers.
3.
The heating of boiler parts is not uniform, so, there are chances of differential expansion of parts and hence chances of cracks are maximum.
The heating of boiler parts is uniform, so, there is no chance of differential expansion of parts and hence chances of cracks are minimum.
4.
These boilers take maximum time from cold start.
These boilers take minimum time from cold start.
5.
There is a scale formation between the water tubes and hence blockage of pipes.
There is no scale formation between the water tubes and hence no blockage of pipes.
6.
These boilers produce lesser steam and have low pressure steam.
These boilers produce steam at 30 to 650 tons per hour, at the temp of temp. & 160 bar pressure.
What else can I help you with?
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What is the difference between natural and force commutation?
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Why are boilers placed beneath hot water tanks in people's homes?
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What is forced and natural circulation in boilers?
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What object weighs 149 tons?
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Who invented the corner tube boiler?
November 12, 1944, the first basic patent for Corner Tube Boilers (= Eckrohrkessel, Berlin, Germany) was applied for. During this time oil as fuel ran short. All efforts, to save energy and use domestic and alternate resources, were to be made. One came up with an idea, to operate cars and trucks, not on gasoline or diesel fuel, but with steam.Dr. Vorkauf, a specialist for water circulation in boilers, especially in La Mont boilers (forced circulation boilers), got the order to design a small boiler for a steam engine fired with coal or wood. The result was not as expected a forced circulation boiler, but a natural circulation boiler. A forced circulation boiler of this size would have been too costly.Due to his experience with the La Mont boiler Dr. Vorkauf had the idea to obtain a pre-separation of the steam - water mixture in front of the drum. An extremely lively water circulation resulted from unheated downcomers and a suitable arrangement of the mixture tubes. The unheated downcomers were installed in the 4 corners of the boiler, where they not only served the purpose of water circulation, but also as a support frame for the boiler. The boiler with such an arrangement of the downcomers in the corners was called Corner Tube Boiler (Eckrohrkessel, Eckrohr-Boiler).
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