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Calculate (a) the work output of the turbine (kJ/kg), (b) the feed pump work (kJ/kg), (c) the heat rejected in the condenser (kJ/kg).
Draw the system response for Kp = 1,2,3,4). Derive the transfer function of this system with a Proportional control Kp and an integral control Kl with a feedback loop.
If the coefficient of friction between the wheel and the incline is 0.5, calculate the friction force and the acceleration of the center of the wheel.
Determine the thermal efficiency, heat required, and net work output per mole of air, assuming (a) The heat capacities are temperature-independent at the values at 298 K.
Determine (a) the pressure and temperature at each point in the cycle. (b) The thermal efficiency (c) the mean effective pressure.
Determine the following. A) the efficiency of the heat engine, B) the heat added to the water in the heat engine, C)the work done by the heat engine.
What is the lowest maximum temperature at which the engine will run (i.e. no net power output)? b. If the maximum cycle temperature is 1150C, what is the cycle efficiency?
The maximum temperature in the cycle is 1100 C. a. Find the pressure and temperature at the end of each process in the cycle. b. Determine the compressor and turbine work and the cycle efficiency.
Heat transfer to the air per cycle is 1800 kJ/kg. Determine p and T at the end of each process in the cycle and the thermal efficiency.
Determine the entropy generation, in kJ/(Kg.K), for the control volume which includes the air flow and the immediate surroundings where heat transfer occurs.
Determine the entropy change, in kJ/K. (check units). Determine the direction of any heat transfer by using the entropy balance.
Find a 90% confidence interval for the difference in the average time for men and women who attend Mr. Ripper's party.
Write the equation for the 96% confidence interval of difference in the proportions of men and women who will get braces at the orthodontist.
Helium gas is compressed isentropically from 1 bar and 25 C to a pressure of 10 bar. What is the temperature of the Helium gas after compression?
Determine the mass flow rate in kg/s, the temperature at the exit of the turbine, in C, the power developed by the turbine in kW and the isentropic turbine efficiency.
Calculate the actual force (lb) output of the cylinder based on the amount the spring was compressed. Compare it with the theoretical force of the cylinder.
If the pressure of the cylinder is p = 365 psi, diameter of the piston is 5 in, diameter of the rod is 1 in calculate the load carrying capacity of the piston (lb) during extension.
What is the velocity in the bypass and the main pipe? What is the total volumetric flow rate in gallons per minute? Assume that the friction factor in both lines is f=.004.
What is the change in the cold air specific entropy per unit of cold air flow rate? What is the net entropy generation per unit of cold air flow rate?
Determine (a) the mass flow rate of the refrigerant (b) the rate of heat supply (c) the COP (d) the minimum power input to the compressor for the same rate of heat supply.
If the temperature in the house is 7 degrees C when the heat pump is turned on, how long will it take for the heat pump to raise the temperature of the house to 22 degrees C?
Determine the minimum power requirement in kW; determine the power requirement if the pump has an isentropic efficiency of 85%.
The temperature at the conclusion of the adiabatic expansion is 20°C. Sketch the cycle on T-s and P-v diagrams. Determine the heat added and net work in KJ, and the thermal efficiency.
If the process is carried out by heating the water in an internally reversible manner at constant pressure and temperature, determine the work and heat transfer in KJ/kg, and plot the process on T-s
Determine the position P where the ball and arrow will hit the ground, relative to the point O located directly under the point of impact.