Gallon per EDR question...

Mark Eatherton

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

JStar

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

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

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

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

Thanks Mark...

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



ME