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1) A gas turbine has an overall pressure ratio of 5;11 and a maxi¬mum cycle temperature of 550°C. The turbine drives the compressor and an electric generator, the mechanical efficiency of the drive being 97%. The ambient temperature is 20`C and the isentropic efficiencies of the compressor and turbine are 0.8 and 0.83 respectively. Calculate the power output in kilowatts for an air flow of 15 kgjs. Calculate also the thermal efficiency and the work ratio. Neglect changes in kinetic energy, and the loss of pressure in the combustion chamber.
2) In a marine gas turbine unit a high-pressure stage turbine drives the compressor, and a low-pressure stage turbine drives the propeller through suitable gearing. The overall pressure ratio is 4/1, and the maximum temperature is 650°C. The isentropic efficiencies of the compressor, H.P. turbine, and L.P. turbine, are 0-8, 0.83, and 0.85 respectively, and the mechanical efficiency of both shafts is 98%. Calculate the pressure between turbine stages when the air intake conditions are 1.01 bar and 25°C. Calculate also the thermal effi-ciency and the shaft power when the mass flow is 60 kg/s. Neglect kinetic energy changes, and the pressure loss in combustion.
3) For tae unit of problem 2, calculate the thermal efficiency obtainable when a heat exchanger is fitted. Assume a thermal ratio of 0-75. (23.4%)
Two batteries with 1.8 voltage and 10.5 Ohm internal resistance each are connected in series. This battery pack is used to boot a small electric motor with 275 Ohm resistance. Find the power delivered to the motor.
For a conductive metal the Fermi energy was determined to be 7.01eV at 300K. a)What is the probability of an electron occupying the energy level of 7.15eV b)What would the probability become if the temperature rises to 757°C
Problem: Consider the signal x(t) = 1.5cos(0.15π(t + 1.4)) + 3 cos(0.25π(t - 3)). (a) Sketch the two-sided spectrum for x(t).
An InP TED is 0.5 pm long with a cross sectional area of 10" cm2 and is operated in the transit-time mode.(a) Find the minimum electron density no required for transit-time mode.
The flip-flop input excitation equations are as follows: JA=XQ'B; KA=X'; JB=XQA; KB=X'Q'A The output equation: Z=XQAQB 1. Draw the circuit diagram 2. Obtain and simplify the flip-flop characteristic equations 3. Obtain the state table
Suppose you have a line charge and a point charge in space. A point charge of 16nC is located at Q(2,3,5) in free space, and a unifor line charge of 5nC/m is at the intersection of the planes x=2 and y=4. If the potential at the origin is 100V, fi..
assume QPSK is the modulation method used in a digital communication system.The communication system requires minimum bit error.what is the acceptable bit error assuming additive white gaussian noise.
1. materials are deep-seated in human culture. do you agree with this statement? why or why not? give examples of
Derive the equation of motion for the system to obtain the mathematical model and experimentally obtain the parameters of transfer function of the pendulum system.
What is the frequency response analysis. Which two parameters are used to determine frequency response. Draw Bode Plot for G(jw) = 10 (jw + 3) / [(jw)(jw + 2)]
Write the formula for the magnetization volume current density J M and magnetization surface current density JMS in terms of magnetization vector M. 4. A sphere has permanent magnetization where is a positive constant.
explain the construction of different types of power transformer 1. explain with the aid of diagrams the following in
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