Ships Nostalgia - View Single Post - Boiler probably of the 19th century
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Old 27th November 2019, 19:13
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Organisation: Merchant Navy
Department: Engineering
Active: 1957 - 1961
 
Join Date: Dec 2007
Posts: 9,064
Hello there Sidnik, The furnace tube diameters and the number of stay bars would indicate that it is a boiler designed for higher pressures than usual while the two furnace design was not uncommon ,the number being dependent on the required boiler steam output and the heat value of the fuel.
At 100 years old it was most likely coal fired but if younger and oil fired everything changes.
When designing coal fuelled fire tube boilers only the top half of the furnace tube is regarded as effective heating surface due to the grate or fire bars shielding the lower section while oil or gas firing can utilise the whole diameter and can be proportionally smaller .
The photo suggests that it is sitting under water ,end up.

Bob
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