3. You have just purchased a remote uninhabited island where you plan to give pa

Question

3. You have just purchased a remote uninhabited island where you plan to give parties lasting till late at night. You need to install an electric power system that will provide at least 4 kW of lighting i. List and describe, in several sentences, three methods of generating power in this remote location (assuming that equipment and supplies can be transported to the island). ii. Assume that the decision has been made to produce the electric power by means of an engine- driven generator. Specifically, an engine will be direct-connected to a generator that delivers power to bulbs. Available choices are as follows Bulbs. 60-W bulbs at 110 V. The bulbs may be connected in parallel, in series, or irn cornb!nation, and the current flowing through a bulb must be above 70% of the rated current to obtain satisfactory lighting efficiency but below 110 percent of the rated current to achieve long life. Engines. A choice can be made between two engines whose power deliveries at wide-open throttle are as follows: 50 6.4 7.6 Hint: The engine can run at a given speed and put out less power by closing the throttle. Power delivery, kW, at a given speed, rev/s 30 4.5 5.6 20 2.7 .6 40 5.6 6.9 Engine Generators. Single phase, alternating current (AC). No adjustment of output voltage is possible except by varying the speed. The frequency must be greater than 35 Hz in order to prevent flickering of the lights. Neglect the voltage drop and power loss in the transmission lines. A choice can be made between the following two generators Maximum Allowable Output voltage, V, at given , rev/s 30 Generator Poles Efficiency Current, 10 20 40 50 0.72 0.83 100 50 38 140 170 224 270 106 174 4 Hint: regarding generator poles and frequency: 3600 RPM (60 rev/s), 2 pole, gives 60 1800 RPM (30 re/s), 4 pole, gives 60 Hz Make the following design selections a nd specifications: Engine number_ Gencrator number Engine Generator Speed rev/s Frequency- Power delivered by engine_kW Power delivered by generator Voltage Current kW Number of bulbs and circuiting (show a wiring schematic) iii. Review the design and list the decision that preclude possible optimization later in the design.

Explanation / Answer

Answer of question i)

Power generation can be done by various ways some of them are

Solar energy- Solar powered panels convert the sun rays into electricity by exciting electrons in silicon cells using the photons of light from the sun which is called photoelectrons.

Wind energy-Power of wind used to rotate wind turbines which is further connected through mechanical generators which produces electricity.

Tidal energy-It operates by the energy obtained from tides to move turbines placed on sea bed.

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