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A 1.2 MW wind turbine has a rotor diameter of 64 m. the turbine operates in an area with an average wind velocity of 7.5 m/s and the air density of 1.18 kg/m^3. the turbine power coefficient including the unit efficiency is 42.8 percent. (a) Determine the power output and the annual energy produce (b) the total installed cost is $1.2 million, and its annual cost is based on the equivalent of a 20-year, 5percent loan to cover the capital cost. the annual Debit payment (DP) is determined from DP=CRF x Total installed cost. The CRF is Capital Recovery Factor evaluated from CRF = (i(i+1)^n/(1+i)^n-1, where i is the interest rate in decimal form, and n is number of years. if the annual operation and maintenance cost 1 percent of the capital cost, determine the cost of electricity in cent/kWh.
The voltage across the load must remain between 4.7 and 5.0 V for all values of load current. Come up with (draw) a voltage-divider network to supply the load. You may assume that resistors of any value desired are available.
The river estuary is tidal causing the surface level of the water to rise and fall. At certain times of day, reflections from the water surface cause deep fading of the received signal.
Determine the transfer function for a first order low pass filter with a cutoff frequency of 1000 radians/sec (note radians and not Hertz) and a pass band gain of 1 using the following types.(a) Butterworth type(b) Chebyschev type
Need for radical future plans to alleviate the very real problem we are faced with in New Zealand and address this problem, by providing an answer to Transpower
Is the second law satisfied? Will this refrigerator still satisfy the second law if its coefficient of performance is 6?
A 250hp, 500v dc shunt motor draws a nominal field current of 5A under rated load. The resistance is 90ohms. Calculate the ohmic value and power of the series resistor needed so that the field current drops to 4.5A
Design a low pass FIR filter for 10 kHz sampling, with a pass band edge at 2 kHz, a stop band edge at 3 kHz, and 20 dB stop band attenuation. Find the impulse response and the difference equation for the filter.
In comparing the behaviour of an n-channel MOSFET with a p-channel device having identical geometry and threshold voltage, it is found that the n-channel FET has a greater drain current than that of the p-channel FET.
In a bank, among the accounts opened before 2005, 40% are saving accounts, 20% are chequing accounts and rest are mutual fund accounts. These numbers for accounts opened on or after 2005 are: 30% saving accounts,
A micrometer caliper is used to measure the diameter of a bolt and a reading of 0.768 inches is obtained. Based on this measurement, find the smallest possible diameter and the largest possible diameter.
The schematic of the traffic light controller
A heat engine operating in outer space may be assumed equivalent to a Carnot engine operating between reservoirs at temperatures TH and Tc The only way heat can be discarded from the engine is by radiation
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