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A modified Brayton cycle is to be analyzed using the air-standard assumption with constant specific heats at a temperature of 300K. Air flows through the Brayton cycle with a mass flow rate of 400 kg/s and enters the first compressor with a pressure of 100kPa and a density of 1.2 kg/m3.It is then compressed to 800kPa in the first of two compressors with an isentropic efficiency of 85%. After this compression, the air is cooled at constant pressure where it is now found to have a volumetric flow rate of 57.4 m3/s when it enters the second compressor. The second compressor has an isentropic efficiency of 85% as well and the air leaves this stage of the cycle at a pressure of 2.5 MPa.The cycle has a regenerator with an effectiveness of 75% which heats the air to a temperature of 600K after leaving the final compressor. The air enters the first turbine which has an isentropic efficiency of 90% at a temperature of 1200K after which it expands to a pressure of 700 kPa. The second and last turbine stage has an isentropic efficiency of 80%.Determine:a) The temperature of the air leaving the last turbineb) The net power production of the cyclec) The thermal efficiency of the cycle
Carbon dioxide enters an adiabatic compressor at 100kPa and 300K at a rate of 0.5kg/s and exits at 600kPa and 450K. Considering constant specific heat, determine (a) isentropic efficiency of the compressor (b) the rate of entropy change in (kW/K) ..
A long electric wire of radius r0 generates heat at rate of q'''. The surface is maintained at uniform temp of T0. Write heat equation and boundary conditions for steady state one dimensional conduction.
(a) Determine the blade angles at leading and trailing edges of both the rotor and stator at the mean radii, (b) Calculate the mass flow rate and the power required for each stage.
two solid cylinders rods AB and BC are welded together at B and loaded. determine the magnitude of the force P for which the tensile stress in rod AB is twice the magnitude of the compressive stress in rod BC?
the lower end of the 30 kg slender rod is displaced a small amount and released from the rest. determine the natural
Consider a cylindrical titanium wire 3.0 mm in diameter and 2.5 x 104 mm long. Calculate its elongation when a load of 500N is applied, assuming that the deformation is totally elastic.
A plane can fly 305 mph in still air. If it can fly 185 miles downwind in the same amount of time it can fly 120 miles upwind, find the velocity of the wind.
What is the discharge revised discharge pressure of the compressor.
how penalty method is applied on a one dimensional heat equation in Meshless method.
Large stationary brayton cycly gas turbine power plant delivers a powr output of 100MW to an electric generator . Minimum temperature is 300K so T1= 300k max temp is 1600k
Determine the COP of the heat pump that applies energy to a house at a rate of 4500kj/h for each kW of electric power it draws. Also, determine the rate of the energy absorption from the outdoor air.
the man has mass 80kg and sits a distance 3m fromnbspthe center of the rotating platform. due to thenbsprotation his
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