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Determine the exergy of the energy, assuming an environment temperature of 77°F. Does the source of the heat energy matter in terms of exergy?
Calculate the force required in direct extrusion of 1100-O aluminum (Y=105 MPA) from a diameter of 100mm in to 50mm.
The ratio of specific heats for the working fluid is Y(gema). Given temperature ratio (t) what is the optimal compression ration (r) in this cycle?
Find the nozzle throat area, the Mach numbers before and after the shock, the nozzle areas at the point where the shock occurs and on the exit plane, and the air density on the exit plane of the noz
Mass of beam is 900 lbm and gravity is 32.174 ft/s^2. What is the value of the Force "F" that makes the reaction at A 75% of the reaction at B when the position x = 13 ft.
The static pressure as 55 kPa and stagnation temperature as 95 °C. Estimate the velocity of the stream assuming that the flow is supersonic.
Using a unifrom mesh size deltaX = deltaY, determine the finite difference equations and the nodal temperatures with the Gauss-Seidel iterative method.
What is the "maximum" length of the surface crack you can tolerate for this same component alloy at a stress of 325 MPa? Assume the crack geometric constant to be 1.5?
Calculate the shear stress at Point E. Point E lies on the outer edge of secion CD. Calculate the shear stress at point F. Point F lies on the inner edge of section CD.
What electric output would you estimate for this electric generator? This system is called a combined cycle where you combine a gas turbine with a Rankine cycle.
Air (modeled as an ideal gas) enters a steady state adiabatic turbine at 1200 K and exits at 100 kPa, 700 K. The isentropic efficiency is 0.855. Find: the power per unit mass air flowing (kJ/kg)
If the refrigerator is reconfigured to work as a heat pump, for same COP and work input, what is heat removal rate from cold space?
The change in diameter of the specimen. Indicate an increase in diameter with a positive number and a decrease with a negative number.
Calculate the critical radius given values of -3.1 × 108 J/m3 and 25 × 10-3 J/m2, respectively, for the latent heat of fusion and the surface free energy.
What steady-state creep rate would you predict for this alloy at 600oC and 55 MPa? What useful life would you predict for this component at 600oC and 55 MPa
Determine the fatigue strength at 5 X 105 cycles. What is the predicted useful life of this component at 200 MPa? Does this material show an ENDURANCE LIMIT.
If the dislocation is pi nned at two points 1 micron apart so that it can be a Frank-Read source, what stress is needed to make it an active source?
Find the amount of energy the freezer must remove from the R-134a and the extra amount of work input to the freezer to perform the process.
Carbon dioxide at 20 degrees celsius and a pressure of 550 kpa flows through a pipe at 0.04 N/s, what would be the maximum diameter of the pipe for the flow to be turbulent?
Now the same airfoil is turned upside-down (so it becomes an airfoil with a negative camber). Calculate its lift coefficient at the same angle of attack of 5 as in part a.
Determine the outlet temperature for both the isentropic and actual compression processes. Determine the actual power input required Draw both the actual and isentro pi c processes on a well-labeled
The compressor has an isentro pi c efficiency of 95%. Assume constant specific heats for air. What is the ACTUAL outlet temperature of the air?
The average surface temperature of the plates is 10 degree in celcius. Determine the average heat transfer coefficient and the rate of ammonia condensation.
If the turbine inlet pressure in a Rankine cycle is 5MPa and the inlet temperature is 350C, determine the efficiency of the cycle if pump work is neglected.
Air is compressed in the compressor of a turbojet engine. Find mass specific enthalpy change associated with compression process.