Search results
Results From The WOW.Com Content Network
The average steam consumption of those engines (per output horsepower) was determined to be the evaporation of 30 pounds (14 kg) of water per hour, based on feed water at 100 °F (38 °C), and saturated steam generated at 70 psi (480 kPa). This original definition is equivalent to a boiler heat output of 33,485 Btu/h (9.813 kW).
L.D. Porta gives the following equation determining the efficiency of a steam locomotive, applicable to steam engines of all kinds: power (kW) = steam Production (kg h −1)/Specific steam consumption (kg/kW h). A greater quantity of steam can be generated from a given quantity of water by superheating it.
The watt, kilogram, joule, and the second are part of the International System of Units (SI). The hour is not, though it is accepted for use with the SI.Since a watt equals one joule per second and because one hour equals 3600 seconds, one watt-hour per kilogram can be expressed in SI units as 3600 joules per kilogram.
A typical turbocharged V8 diesel engine might have an engine power of 250 kW (340 hp) and a mass of 380 kg (840 lb), [1] giving it a power-to-weight ratio of 0.65 kW/kg (0.40 hp/lb). Examples of high power-to-weight ratios can often be found in turbines.
A kilowatt is a unit of power (rate of flow of energy per unit of time). A kilowatt-hour is a unit of energy. Kilowatt per hour would be a rate of change of power flow with time. Work is the amount of energy transferred to a system; power is the rate of delivery of energy. Energy is measured in joules, or watt-seconds.
The capacity of the generating plant was 575 kW and the maximum load was 156 kW. ... 2 × Holdsworth 12,000 lb/hr (1.51 kg/s), steam conditions were 180 psi at 600 ...
2 × Babcock and Wilcox Land type each 23,000 lb/hr (2.89 kg/s) 2 × Babcock and Wilcox CTM each 20,000 lb/hr (2.52 kg/s) The total steam capacity was 86,000 lb/hr (10.83 kg/s), which fed; Turboalternators 2 × 3 MW Metro-Vickers turboalternators. The electricity supplied by Hinckley power station in the post war period is shown in the table. [3]
The machines were supplied by five Lancashire boilers each with an evaporative output of 5,000 lb/h (2,268 kg/h) of steam. [4] There were also motor generators and batteries. In 1898 the electricity generating capacity was 1,386 kW. There were estimated to be 39,407 lamps of 8-candle power plus 257 public lamps. [1]