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It is required to specify an ideal closed cycle gas turbine to produce electricity for a process plant. The first specification requires that the turbine produces the maximum work output possible between the peak temperature (1200 K) and the inlet temperature (300 K). The customer then feels that the efficiency of the turbine could be improved by
1. incorporating a heat exchanger;
2. introducing reheat to the turbine by splitting the turbine pressure ratio such that the pressure ratio of each stage is the square root of the compressor pressure ratio.
Evaluate the basic cycle efficiency, and then evaluate separately the effects of the heat exchanger and reheat. If these approaches have not increased the efficiency, propose another method by which the gas turbine performance might be improved (between the same temperature limits), without reducing the work output; evaluate the thermal efficiency of the proposed plant.
The ratio of specific heats may be taken as k = 1.4.[0.5; 0.4233; 0.5731]
if the atmospheric pressure is 1.025 bar at a location where you can dive in a lake to 30ft below the surface and then
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A strain gauge is used to measure the top surface strain on an end loaded cantilevered beam. From the end of the beam to the location of the strain gauge is L=12.1 inches. The width of the beam is w=0.99 inches, and the the thickness of the beam is t..
An outside company, McDonald Inc., made the machine seven years ago and can easily do the same modifications for $60,000. The cooling system used for this machine is not environmentally safe and would require some disposal costs. McDonald Inc. has..
Find (a) the angular acceleration, (b) the time taken, (c) the work done, (d) the maximum power developed, (e) the distance travelled by a point on the rim of the flywheel.
Determine the force P required to force the 10° wedge under the 90-kg uniform crate which rests against the small stop at A. The coefficient of friction for all surfaces is 0.40.
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a refrigerator removes heat from the refrigerated space at 2 oc at a rate of 300 kjmin and rejects heat to the kitchen
The main bearing on an engine crankshaft is lubricated with engine oil. The torque due to friction T0 depends on shaft diameter D, rotational speed, lubricated viscosity, and density. Use dimensional analysis to derive an expression for torque.
a shunt dc motor has ra 0.3 u03a9 and vt 999.9 v. for an output power of 31.6 hp we have nm 1483 rpm and ia 145.8 a.
a dynamics student is called on to investigate a two-car collision. its known that car a struck car b. mass of car a is
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