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The mass flow rate through a steam turbine operating under steady conditions is 100 kg/s. Steam enters the turbine at 12 MPa and 400oC. A mixture of vapour and liquid water exits the turbine at 10 kPa. At the exit state 93% of the mass of the water is in vapour form. The turbine loses heat to the surroundings at the rate of 3 MW. Kinetic and potential energy effects can be ignored. Do the following: (a) Draw a schematic of the system and clearly indicate the system boundary using a dashed line. Indicate and label the mass flow inlets and outlets. Using arrows, illustrate the energy transfers between the system and surroundings by heat transfer and by work. 1(b) Write a 1st law energy balance for the system that agrees with your schematic. Cancel all unnecessary terms, providing justification for why these terms can be cancelled. (c) Draw the process on a T-s diagram, clearly indicating the state points and the isobars corresponding to the state points. (d) Calculate the power generated by the turbine in MW. (e) Calculate the change in specific entropy from inlet to exit in kJ/kgK.
A computer chip has dimensions 3 × 3 × 0.2 and a volumetric heat generation rate of 2.5 × 107/3. The bottom and side surfaces of the chip experience no heat loss, whereas the top surface is cooled by air convection, with = 310?? and = 300 /2 x . Find..
carbon is diffused into steel at 900oc over a period of 10 hrs. the solubility of carbon in steel at this temperature
An engineer insists that a component is fully constrained with 0 DOF because 2 plates are bolted together with 4 screws (assuming one of the 2 plates is considered "grounded"). Is he / she correct? Explain why or why not using concepts discuss..
how do you plot an isentropic compression process on a pressure-enthalpy diagram? i know how to do it on a
consider a metal single crystal oriented such that the normal to the slip plane and the slip direction are at angles of
An accelerometer is being designed to measure up to 6664 Hz while remaining under 1.7% error. If the natural frequency of the accelerometer is 9613 Hz, determine the damping ratio that will provide 1.7% error.
in an air compressor the pressure at inlet and outlet are 1bar and 5bar respectively. the temperature of the air at
Refrigerant-134a enters an adiabatic compressor as saturated vapor at -24 degrees Celsius and leaves at 0.8 Mpa and 60 degrees Celsius. The mass flow rate of the refrigerant is 1.2 kg/s. Determine (a) the power input to the compressor and (b) the vol..
an air standard brayton closed cycle receives air at 1 atm and 298 k. the upper temperature and pressure limits are 5
An iceberg with specific gravity (SGice) of 0.92 is partially submerged in seawater whose specific gravity is SGw= 1.025. Determine the relative volume of the iceberg that appears above the surface of the sea.
a laser is directed at a double-slit arrangement. if we increase the wavelength of the light which of the following
natural gas is primarily composed of methane ch4 while coal can be modeled as eicosane c20h42. methane has a heat of
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