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Air Volume, pipes and radiators...

drtom
drtom Member Posts: 31
in Strictly Steam
What is the formula to determine the volume of air that has to move out of my pipes and radiators? I have the PDF file Balancing Steam Sytems, so I have a basic instruction. What does EDR mean?

I am not a professional, simply a home owner, so I do not have Dan's workbook from Dead Men's Steam School. I have two different types of radiators (pictured below). The first type comes in three sizes, and the second type is unique in my system.



<a href="http://img408.imageshack.us/i/r0701.jpg/"><img src="http://img408.imageshack.us/img408/3918/r0701.th.jpg" width="113" height="150" alt="" /></a>

Type one, small.



<a href="http://img338.imageshack.us/i/r020.jpg/"><img src="http://img338.imageshack.us/img338/5903/r020.th.jpg" width="113" height="150" alt="" /></a>

Type one, large.



<a href="http://img526.imageshack.us/i/r06m.jpg/"><img src="http://img526.imageshack.us/img526/1271/r06m.th.jpg" alt="" /></a>



Type two.

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Comments

  • nicholas bonham-carter
    nicholas bonham-carter Member Posts: 8,578
    rad volume

    it's unusual to have vents on those rads with 2 pipes. are you sure they should be there?

    that looks like a very low pressure vapor system, whose flow of incoming steam  is carefully valved so that only the amount which can be condensed is allowed in. i would think that all the venting would be handled in the returns.

    nice floors!--nbc
  • Jamie Hall
    Jamie Hall Member Posts: 24,857
    see your other thread...

    it is a little unusual to see vents on the radiators on a two pipe system, but this looks like one of the very old systems, which did have vents -- and no traps.  Should run on a maximum of 1 to 2 psi.



    EDR is the effective direct radiating area of a radiator -- there are references on this site for it.



    You might also pick up the three books in "A Steamy Deal", from the shop on this site -- then although you don't have Dan's workbooks, you'll be able to get a pretty good idea as to what is going on.



    Please refer to my post on your other thread for more...
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • drtom
    drtom Member Posts: 31
    edited December 2010
    EDRs

    It looks like the only way to calculate EDRs is with a $25.00 book. Is there another way? As a home owner, I want to get the proper vents, but I would hate to buy the EDR book and then never use it again.

    Does anyone on here have the book and perhaps willing to look up my radiators?

    There was an error rendering this rich post.

  • Rod
    Rod Posts: 2,067
    Work Sheet

    Hi-  Attached is a work sheet that might be of help to you

    - Rod
  • Steamhead
    Steamhead Member Posts: 17,384
    edited December 2010
    Type One is a "Column" radiator

    and the number of vertical members in each section determines whether it's one-column, two-column, three-column etc.



    Type two is a "small-tube" radiator. The same vertical member rule applies here- but on this one it's 3-small-tube, 5-small-tube, etc.



    If you're not sure what you're looking at, take pics of each from one end. Then post them and we'll tell you what you have. Also include the height of each.
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
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