There are three important performance features of a synchronous generator. The first is the power factor of the power delivered by the generator, and the second is its ability to be connected in parallel with other similar or dissimilar synchronous machines and run in synchronism with them. Finally, the minimum and maximum mechanical torque, essential […]

Rotating pretwisted beams exhibit interesting coupling phenomena between extensional, torsional, and flexural vibrations and have been the subject of extensive research due to their use as wind turbine rotor blades. Due to the complex geometry introduced by the pretwist, a number of approximate theories were developed for the analysis of non-rotating and rotating pretwisted blades. […]

The availability of wind energy at offshore locations, particularly in the North Atlantic Ocean adjoining several northern European nations, the United Kingdom, North America as well as at several other locations on the planet offers the pos­sibility of extracting significantly large quantities of power. A single offshore wind turbine with a rotor diameter up to […]

To increase the steady-state value of AWc it is important to increase the steady flow delivered by the compressor. This can be done by increasing the input to the compressor. To incorporate such a feature in our model, one assumes a distribution of pressure sources at the inlet to the compressor and writes the compressor […]

The electrochemical reactions occurring in a FC at the anode are H2 — 2H+ + 2e~, where the corresponding anode thermodynamic potential is E0a = 0.00 V under SHE (under standard hydrogen electrode conditions). At the cathode, the corresponding electrochemical reactions are O2 + 4H+ + 4e~ — 2H2O. Again, the corresponding cathode potential is […]

7.1 Introduction In a battery, reduction and oxidation reactions occur at each of the two electrodes, which are separated by an ionically conductive electrolyte. Typically in a battery, several electrochemical cells are connected in series to provide fixed electromotive force or voltage. Unlike a fuel cell, an electrochemical cell used in a battery is one […]

The equivalent circuit of a solar cell is shown in Fig. 8.12. The two important characteristics of a solar cell are the open circuit voltage output with an infinite load across its terminals and the short circuit current with no load across its terminals. The short circuit current is directly proportional to the illumination /. […]

The dynamic model of the AC induction generator is obtained with a d-q frame derived by the application of the Park transformation to the voltages, currents, and magnetic fluxes in the three phases of the generator. The use of d-q frame allows one to convert the rotating stator and rotor quantities into fixed quantities in […]