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Gallon per EDR question...

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Is anyone aware of a chart that shows how many gallons of water are contained within a typical cast iron radiator per EDR square foot?



I am trying to help my friends in Breitenbush with an estimate of water volume for the purpose of sizing an expansion tank system.



Gratzi, and Happy Labor Day weekend. Am getting ready for 100 or so of my and my wifes friends to come over tomorrow for the annual get together..



ME

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Comments

  • JStar
    JStar Member Posts: 2,752
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    Do you have...

    ...the chart for balancing a steam system with air vents? They have the multiplier to figure out the air in a radiator. Should be the same to find water volume.
  • World Plumber
    World Plumber Member Posts: 389
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    Some formulas

    Mark,

       I couldn't find anything in the EDR book , I'll continue to look.

    Ft./Lb.

    Energy

    1 HP 0.746 KW 746 Watts 2,545 BTU/h 1.0 kVA

    1 KW 1,000 Watts 3,413 BTU/h 1.341 HP

    1 Watt 3.413 BTU/h

    1 Ton Ac 12,000 BTU/h Cooling 15,000 BTU/h Heat

    Rejection

    1 BTU/h 1 BTU per hour

    1 BHP 34,500 BTU/h (33,472 BTU/h) 34.5 Lb.

    Steam per hour 34.5 Lb. H2O/Hr. 0.069 GPM 4.14

    GPH 140 EDR (Sq. Ft. of Equivalent Radiation)

    1 Therm 100,000 BTU/h

    1 MBH 1,000 BTU/h

    1 Lb. Stm./Hr. 0.002 GPM

    1 GPM 500 Lbs. Steam per hour

    EDR Equivalent Direct Radiation

    1 EDR 0.000496 GPM 0.25 Lbs. Steam

    Condensate per hour

    1000 EDR 0.496 GPM

    1 EDR Hot Water 150 BTU/h

    1 EDR Steam 240 BTU/h

    1 EDR 240 BTU/h (Up to 1,000 Ft. Above Sea Level)

    1 EDR 230 BTU/h (1,000 Ft–3,000 Ft. Above

    Sea Level)

    USEFUL HVAC CONVERSION MEASURES (cont.)

    USEFUL HVAC CONVERSION MEASURES (cont.)

    1 EDR 223 BTU/h (3,000 Ft.–5,000 Ft. Above Sea Level)

    1 EDR 216 BTU/h (5,000 Ft.–7,000 Ft. Above Sea Level)

    1 EDR 209 BTU/h (7,000 Ft.–10,000 Ft. Above Sea

    Level)

    Flow

    1 mgd (million gal. per day) 1.547 Cu. Ft./Sec.

    694.4 GPM

    1 Cu.Ft/Min. 62.43 Lbs. H2O/Min. 448.8 Gal. per

    hour

    Metric Conversions

    KJ/Hr BTU/h 1.055

    CMM CFM 0.02832

    LPM GPM 3.785

    KJ/Lb. BTU/lb. 2.326

    Meters Feet 0.3048

    Sq. Meters Sq.
  • World Plumber
    World Plumber Member Posts: 389
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    Gpm=btu/500

    Mark: if we Take GPM = BTU/HR

    500 (water) X temp diff deg F

     So if we take 150 as the average BTU /ft. EDR at 170 degree water say we have 17 ft EDR.  17X150= 2550/500= 5.1 gal It sounds like it might be close. That is the amount of water needed for that many BUT's.     ?????
  • World Plumber
    World Plumber Member Posts: 389
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    Found it!

    Mark:

    Burnham's heating helper page 50. I tried to copy paste but the columns when all over.

        I tried to doctor up the water content column.

            MC



    A. RADIATION

    Based on Sq. Ft. Rating                       Water Content/Gal. Weight/Lbs.

    Slenderized Radiators                                   0.066                   4.5

    Large Tube Radiators                                    0.103

    Column Radiators                                          0.188

    Convectors (Non-Ferrous)                             0.004

    Convectors (Cast Iron)                                  0.040

    Radiant Radiators                                          0.066

    Base-Ray (Cast Iron Baseboard)                   0.066

    0.066

    0.103

    0.188

    0.004

    0.040

    0.066

    0.066

    4.5

    5.25

    7.0

    1.5

    3.4

    5.0

    4.4

    B. STEEL AND WROUGHT IRON PIPE (STD. WGT.)

    Nominal Size:

    Inches

    Based On Lineal Foot

    Water Content/Gal. Weight/Lbs.

    1/2"

    3/4"

    1"

    1-1/4"

    1-1/2"

    2"

    2-1/2"

    3"

    4"

    5"

    6"

    .016

    .028

    .045

    .078

    .106

    .174

    .249

    .384

    .661

    1.039

    1.501

    .132

    .231

    .375

    .648

    .883

    1.455

    2.076

    3.205

    5.519

    8.662

    12.510

    C. COPPER TUBING (TYPE L)

    Nominal Size:

    Inches

    Based on Lineal Foot

    Water Content/Gal. Weight/Lbs.

    3/8"

    1/2"

    5/8"

    3/4"

    1"

    1-1/4"

    1-1/2"

    2"

    .007

    .012

    .018

    .025

    .043

    .065

    .092

    .161

    .063

    .101

    .151

    .210

    .357

    .544

    .770

    1.340

    D. WATER CONVERSION FACTORS

    Lbs. of
  • Mark Eatherton
    Mark Eatherton Member Posts: 5,853
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    Thanks Mark...

    and to the other posters as well. SHould be able to get them into the ball park.



    ME

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