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Connected load in steam systems

Franky
Franky Member Posts: 5
in THE MAIN WALL
A steam boiler is generally sized to match the instaled radiation & piping.

Does the actual load vary depending upon the outdoor temperature or is it constant? In a hydronic system the load varies depending on the outdoor temperature?

Can you heat 500 sq. foot of radiation with a 400sq. foot boiler if the temperature outside is 40 degrees or will it not make steam under any circumstances?

Is it a physics thing?

Comments

  • Unknown
    Unknown Member
    It is a physics thing

    At atmospheric pressure, once steam drops below 212° F, it stops being steam (as a gas)

    Since the air in the room stays the same temp, and since the low end temp of steam stays the same, you need to have the same amount of boiler as load. If not, some radiators will stay stone cold, rather than all of them being a little cooler.

    Noel
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