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Air enters an adiabatic turbine at 408ºC and 1.3 MPa and leaves at 56 kPa. If the isentropic efficiency of the turbine is 92%, what is the actual exhaust temperature at the outlet in ºC?
Consider oxygen at 100 bar and specific volume of 0.08. Calculate the temperature T using the Van der Waal's equation of state.
Sample B is dry, but the density is the same as that of sample A. Assuming air to be an ideal gas, determine the temperature of sample B.
A laboratory test shows that the saturation pressure at -31 deg C is 0.9 bar and the saturation pressure at -29 deg C is 1.1 bar. If the mass flow rate of refrigerant is 0.01 m^3/s, find the refrige
Determine (a) the compressor power, in kW, (b) the refrigerating capacity, in tons(1 ton of refrigeration=3.52 kW), and (c) the coefficient of performance. Show the cycle on a T-s diagram.
Nitrogen at 900kPa and 300oC is expended adiabatically and reversibly in a closed system to 100kPa. Determine the minimum nitrogen temperature after the expansion.
The turbine isentropic efficiency is 0.75. Calculate the efficiency of the plant. If the unit produces 12.5 MW, what is the steam flow rate?
Determine (a) the net power developed in kW (b) the back work ratio, and (c) the thermal efficiency of the cycle . You may assume air to behave like an ideal gas.
Estimate the energy that a runner expends to overcome aerodynamic drag while running a complete marathon race. This expenditure of energy is equivalent to climbing a hill of what height?
The moist air is then passes through the heating unit. In the heating unit the moist air is heated to 24 oC without adding any moisture. Show the processes on a schematic psychome
Determine the minimum temperature at state 2 and the corresponding minimum power input required by the compressor.
Determine the rate of heat addition and rejection when this cycle produces 110 hp and the cycle is repeated 1580 times per minute. Use constant sp. heats at room temperature.
A different production line has 15 defectives in a sample of 40. Find a 95% Confidence Interval for the proportion of defectives coming off the production line.
What properties (i.e. parameters representing material characteristics) of these gels change over time? Explain this feature m terms of stress relaxation and creep behavior.
Determine the number of discrete frequencies from the minimum to and including the maximum frequency that will appear in an amplitude- frequency plot of a signal sampled every 0.2 s.
Water is boiled at 90 C by a horizontal brass heating element of diameter 7 mm. Determine the surface temperature of the heater for the minimum heat flux case.
Estimate the total number of hours throughout your lifetime that you will spend at work as a mechanical engineer throughout your professional career. Be sure to explain and sb your work.?
What is the maximum tensile load that may be applied without any permanent deformation of the spring wire? Assume that the shear yield strength is 0.6 y, where y, is the yield strength in tension.
Determine a) the air exit velocity to produce 5lbf b) the volumetric flow rate needed, and c) the minimum mechanical power that must be supplied to the airstream. Take the air density to be .078 lb
The surface of the plate has an emissivity of .6. the critical renolds number is 5x10^5 for the flow. Find the heat transfer rate rom one side of the plate in watts.
An SAE 4140 OQT 1000 sleeve is to be secured to a solid pin of the same material with an actual diametral interference of 0.005 inch.
The average convection heat transfer coefficent of the air flow around it is 100 w/m^2 times K. find the amount of heat removed in Watts by a fin of = legenth but twice the diameter under similar co
Calculate the average density of an interply hybrid beam containing m layers of IM7 carbon fiber- epoxy and n layers of E-glass fiber-epoxy.
This type of device is isobaric. Assume the device is adiabatic and neglect kinetic and potential energy changes: h(tot) = h. What is the mass flow rate of liquid water?