Boiler Horsepower

Determine boiler horsepower from heat transfer area

Boiler horsepower is used rating a boiler's capacity to deliver steam to a steam engine.

The amount of energy needed to produce 34.5 pounds (15.65 kg) of steam, per hour, at a pressure and temperature of 0 Psig (0 bar) and 212oF (100oC), with feed water at 0 Psig and 212oF. One boiler horsepower is about 33,479 Btu per hour (about 9,810 watts, 8430 Kcal/Hr).

Boiler horsepower can be determined from the heat transfer area

PBoHP = A / 17         (1)

where

PBoHP = boiler horsepower

A = heat transfer area (ft2)

Boiler Conversion Ratios

from multiply to
sq.ft. EDR steam 240 Btu per hr.
sq. ft. EDR water 160 Btu per hr.
Boiler hp 33.5 MBtu per hr.
Boiler hp 140 sq.ft. EDR steam
Boiler hp  223 sq.ft. EDR steam
Boiler hp. 34.5 lb. per hr. steam
lb. per hr. steam 970 Btu per hr.
to divide by above from

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