Kilowatt, defined

During the testing, the power to the motor or prime mover driving the pump is recorded. Multiplying this input power by the prime mover efficiency produces the brake or shaft power. In the figure, the powers are measured in terms of kilowatts (or kW). Call the head corresponding to the brake power as The brake efficiency of a pump is defined as the ratio of TDH to the brake input power to the pump. Therefore, brake efficiency q is... 

The common units of energy in the field of electrical engineering are the watt-second and the kilowatt-hour. These energy units are usually thought of as being inherently electrical in nature, yet they are, in reality, mechanical energy units. The watt-second, for example, is defined as being equal to 1 (joule) = 10 (erg) = 10 (dyne) (cm). 

Using defined constants and conversion factors for mass, length, time, and temperature, caleulate conversion factors for (a) foot-pounds force to kilowatt-hours, (b) gallons (1 gal = 231 in. ) to liters (10 cm ), (c) Btu per pound mole to joules per kilogram mole. 

The EE/0 is a semi-empirical parameter useful in various water treatment processes. The EE/0 is defined as the kilowatt-hours of electricity required to reduce the concentration of a compound in 1000 gallons of water by one order of magnitude (Bolton and Cater, 1994 Notarfonzo and McPhee, 1994). 

Directly comparing the KPI values to define the most critical impact(s) is difficult since the inventory data have widely disparate units (i.e. kilowatt hour, litre and kilogram). Quantifying all the KPIs in amount of CO2 equivalent, as prescribed by... 

The fuel cell efficiency is defined as a ratio between the electricity produced and hydrogen consumed. Of course, both must be in same units, such as Watts or kilowatts. 

Energy density is the energy obtainable per unit weight of battery, (in, for example, kilowatt hours per kilogram) and is defined by ... 

The work required to continuously produce one watt of power for one second or one watt second (W-s) (compare kilowatt hour). This relationship can be used to define the watt. 

The term "portable power system" is not sharply defined. Hoogers (34] attempted to define it as "a small grid-independent electric power unit ranging from a few watts to roughly one kilowatt, which serves mainly a purpose of convenience rather than being a primarily a result of environ-... 

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