Re: Steam engine question?

Posted by Coldiron on May 12, 2005 at 10:13:52 from (205.188.117.74):

In Reply to: Steam engine question? posted by Chances R on May 11, 2005 at 19:20:59:

Chances Are, I fired boilers 1958 to 2003 and believe me there were winters when the only warmth was up next to the brickwork. Boilers have to have combustion air and the boiler rooms are generally open so the air can get into the forced draft fans for combustion. There are a lot of different ways to get the water into the boiler but the colder the makeup water the more btu`s it is going to take to make the steam. You try to get it through a contact heater or Deareator tank to heat the water to flash off the gasses that are destructive to the water sides of the boiler. Boilers can work into the minus deg ambient temps or as some call it sub zero temps. The older pneumatic instruments would freeze up if there were moisture in the lines which would cause failure but with the newer electronic there is little worry like it was years ago. The boilers I fired by complete manual operation had their problems in cold weather if the makeup water was very cold, it would shrink the water level which would hang low until the heat was in the mass again then the level would jump up so if you added a lot when low now you would have extreme high water and it would go out into the system causing damage to equipment, pipes etc. After you got the feel of it things went pretty smooth.

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• cont`d Coldiron 10:25:11 05/12/05 (0)

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