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In addition, since power and efficiency are important for present applications, the present tool can be used to estimate the data for those characteristics of the machines and even it can be beneficial for the applications, where a nonlinear relationship among the power generation, generator efficiency, speed and load is required.
Figure 12 Generator efficiency vs. Power.
The turbine isentropic efficiency and generator efficiency were 68.1% and 98.5% at a rotational speed of 14,000 rpm.
To maximize the generator efficiency, a control scheme is designed such that converting the wasted energy of pressure drop across the PRV to electricity does not affect the required water pressure and flow on the customer side.
A frequency scaling based on the empirical model indicates that a maximum power output of 84 W at 78% generator efficiency is feasible at the thermoacoustic engine's operating frequency of 250 Hz, not considering power electronic losses.
This modification has demonstrated also an increment of the electrical power produced by the gasification plant of about 40%, which means an increment in the motor generator efficiency of 35%.
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In a power system featuring a large share of intermittent renewables and inflexible thermal generators, efficiency gains could be achieved by curtailing the production of renewables.
This method considers the power source efficiency (i.e. the engine, motor and generator), transmission efficiency, vehicle driving cycle requirements, and primary control strategy.
Well steam generator increases efficiency of underground gasifier by recovery of the flue gas heat and converting it to the superheated steam.
In wind energy utilization the capacity factor and turbine performance index are commonly applied to evaluate a turbine generator's efficiency.
Then, the generator energy efficiency can be calculated as {eta}_g=frac{P_{out}}{P_{in}}=frac{T_e{omega}_r-{p}_{Cu}-{C}_{hys}{f}_s-{C}_{edy}{f}_s^2}{left {T}_e+{B}_m{omega}_rright){omega}_r}, (25 where B m is the machine viscous friction coefficient, C hys and C edy are the hysteresis and eddy current loss coefficients, respectively.
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