|
 |
Boiler Formulas |
 |
|
Common Conversion Factors
|
|
|
Boiler HP x 34.5
Boiler HP x .069
Boiler HP x 33.4
Boiler HP x 139
BTU/Hour Output ÷ 240
EDR/1000 x 0.5
Lbs of Steam /Hr ÷ 500
|
=
Lbs. of Steam per Hour
= Evaporation Rate Gallons per Minute
(GPM)
= MBTU per Hour Output (MBH)
= Sq. Feet of Equivalent Direct Radiation
(EDR)
= Sq. Feet of Equivalent Direct Radiation
(EDR)
= Evaporation Rate Gallons per Minute
(GPM)
= Evaporation Rate Gallons per Minute
(GPM)
|
|
|
Condensate Pump Sizing
|
|
|
Evaporation Rate x
3
Pump GPM x 1
|
= Pump GPM Required
= Receiver Tank Size (Gallons Storage)
|
|
|
|
Example: 2,400,000 output
boiler ÷ 240
10,000 EDR ÷ 1000 ÷
2
5 GPM x 3
15 GPM x 1
|
= 10,000 EDR
= 5 GPM
= 15 GPM pump capacity
= 15 gallon tank
|
|
|
|
Boiler Feed Unit Sizing
|
|
|
Evaporation Rate x 1.85
Evaporation Rate x 20
Rule of Thumb:
|
= Pump GPM Required
= Receiver Tank Size (Gallon Storage @ 20
minutes)
Use one gallon of storage per boiler
horsepower.
|
|
|
|
Example: 3,347,900 output boiler
÷ 33,479
100 BHP x .069
6.9 GPM x 1.85
6.9 GPM x 20
|
= 100 BHP
= 6.9 GPM
= 12.7 Pump GPM Req.
= 138 Gallons Storage
|
|
|
|
Determining Existing Tank Capacity
|
|
|
Square Tank Volume
Round Tank Volume
|
= H" x W" x
L" ÷ 231
= R" x R" x
3.141 x L" ÷ 231
|
= Gallons Capacity
= Gallons Capacity
|
|
|
|
H is height, W is width, L is length, R is
radius
|
|
|
Circulation Pump Sizing
|
|
|
BTU
GPM
^T
|
= 500 x GPM x
^T
= BTU ÷ 500 x
^T
= BTU ÷ 500 x
GPM
|
|
|
^T
is the change in temperature |
|
|
|
|
|
DEBCO EQUIPMENT COMPANY
º 1814 South Third St.
º St. Louis, MO 63104
|
|
