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A round casting is 0.1 m in diameter and .5 m in length. What is the difference in the solidification time of the two castings?
Find the maximum thermal efficiency of this heat engine (62.1%). Determine whether this engine can produce its desired power output (no).
The maximum temperature is 800*C, and the turbine has a total power output of 5 MW. Find the fraction of the extraction flow to the FWH and the total condenser heat transfer rate.
An annual maintenance and operation cost of $27,000 and a $50,000 salvage value. Which should be selected on the basis of a future worth comparison at an interest rate of 15% per ye
A Steady flow centrifugal compressor is supplied with saturated water vapor at 15kPa and 500kg of the water is compressed per hour to 250kPa, 400C. Determine the power required to compress the water
Heat in the amount of 190kJ is transferred directly from an energy-source at 790K to an energy-sink at 2065K. Prove that this violates the increase of entropy principle, as it must according to Cla
Find the reheat temperature so the turbine output is satured vapor. 1) Find the total turbine power output 2) Find the heat transfer into the boiler.
A investor offers to purchase the lease for a single payment of $174,642 payable 10 years from the present. Find the IRR on this investment.
If the power plant has an overall thermal efficiency of 32%, determine (a) the amount of coal consumed during one day in kg and (b) the mass flow rate of air through the furnace in kg/s.
Steam enters a well-insulated turbine operating at steady state at p1=4MPa, T1=320C. Determine the power developed by the turbine.
Differentiate between macroscopic and microscopic approaches. Which approach is used in the study of engineering thermodynamics.
What are the hoop and axial stresses sigmatheta, sigmaz when the cylinder carries an internal pressure of 10 MPa? How much does the radius of the cylinder expand due to the internal pressure?
What are the hoop and axial stresses , when the cylinder carries an internal pressure of 10 MPa? How much does the radius of the cylinder expand due to the internal pressure?
The number of vacancies in some hypothetical metal increases by a factor of 4 when the temperature is increased from 1010 K to 1160 K.
Consider an ocean thermal energy conversion power plant in Hawaii designed to operate between temperature limits of 90°F (ocean surface). Calculate thermal efficiency (%) of the power plant.
Air enters a compressor operating at steady state at 1.05 bar, 300 K, with a volumetric flow rate of 12 m3/min and exits at 12 bar, 400 K. Heat transfer occurs at a rate of 2 kW from the compressor
Determine the pressure (kPa) at the start and end of adiabatic compression. Find the volume (m3) of at the start and end of isothermal heat rejection.
A spring-mass system is found to vibrate with a frequency of 120 cycles per minute in air and 100 cycles per minute in a liquid. Find the spring constant k, the damping constant c, and the damping r
The actual combustion is to take place with 15% excess air. Determine the composition (vol%) and flowrate (std L /min) of the gases leaving the burner if 95% of the fuel is completely consumed and t
What is the shape of isopycanal surface between 400 and 600m? Estimate the density differance across the thermocline. Is this a warm or a cold core ring?
Steam is leaving a pressure cooker whose operating pressure is 30 psia. The amount of liquid inside the pressure cooker is found to decrease by 0.4 gallon in 45 minutes when steady operating conditi
Suppose a liquid level ranging from 5.5 to 8.6 m is linearly converted to pneumatic pressure ranging from 3 to 15 psi. What pressure will result from a level of 7.2 m ?
A fan drawing electricity at a rate of 1.5 kW is located within a well insulated 60 cubic meter rigid enclosure filled with air at 27 degrees C and 1 atm.
A NACA 2415 airfoil with a 0.6 m chord and a 2.5 meter span is being tested in a wind tunnel at standard sea-level conditions and a test section velocity of 175 m/s and an angle of attack of 8 degre
What is the realative vorticity associated with the ring. (consider current shear but ignore any curvature Based on thios value for relative vorticity, estimate Rossby number?