Boiler Horsepower Realtion to Capacity
Boiler Horsepower Realtion to Capacity
(OP)
How is it that a boiler horsepower can be defined as simply being equal to 34.5 #/hr of water evaporated at 212ºF?
Can this be adjusted to allow for varying feedwater temps and final steam temp/pressure?
Can this be adjusted to allow for varying feedwater temps and final steam temp/pressure?





RE: Boiler Horsepower Realtion to Capacity
RE: Boiler Horsepower Realtion to Capacity
That takes away any variation in FW temp, etc.
The term was used more in association with fire tube boilers than drum type boilers when I first encountered it in the early '70's. By the time a boiler got big enough to be a drum type, they were usually referred to by steam flow.
rmw
RE: Boiler Horsepower Realtion to Capacity
For example at ~ 150 psig:
latent heat of evap. ~ 857.3, and it took (338.2 - 180.17) BTU/# to heat the liquid from 212 to 365.5, which is 158.03 BTU's.
So given the definition of boiler hp, would it be correct to say that 1 bhp can produce [ 33478/(158.03 + 857.3) ] #/hr of 150 psig steam? ( = 32.97 #/hr)
I realize we're talking minor differences here, it's more of an academic exercise at this point I suppose.
RE: Boiler Horsepower Realtion to Capacity
RE: Boiler Horsepower Realtion to Capacity
Thank you for the reply. Good point about the elevation as well.