From lownox's link:
A boiler horsepower is used for boilers in power plants. It is equal to 33,475 Btu/h (9.8095 kW), which is the energy rate needed to evaporate 34.5 lb (15.65 kg) of water at 212 °F (100 °C) in one hour.
Compared to the value for electrical horsepower, .746 kW, we have a ratio of over 13:1.
A chart for HP to HP conversion would be a little more interesting than one for Hz to cy conversion.
The chart may include some of the following values:
# 1 Current definitions
* 1.1 Mechanical horsepower
* 1.2 Metric horsepower
o 1.2.1 PS
o 1.2.2 pk, hk and hv
o 1.2.3 CV and cv
o 1.2.4 ch
* 1.3 Boiler horsepower
* 1.4 Electrical horsepower
* 1.5 Relationship with torque
* 1.6 Drawbar horsepower
* 1.7 RAC horsepower (taxable horsepower)
# 2 Measurement
* 2.1 Nominal horsepower
* 2.2 Indicated horsepower
o 2.2.1 SAE gross horsepower
* 2.3 Brake horsepower
o 2.3.1 hp (SAE)
o 2.3.2 SAE-certified horsepower
o 2.3.3 hp (DIN)
o 2.3.4 hp (ECE)
o 2.3.5 9768-EC
o 2.3.6 ISO 14396
* 2.4 Shaft horsepower
* 2.5 Effective horsepower / true horsepower / wheel horsepower
# 3 History of the term "horsepower"
* 3.1 Horsepower from a horse
Bill
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