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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?
A spherical hot-air balloon is initially filled with air at 120 kPa and 35oC with an initial diameter of 3 m. Air enters this balloon at 120 kPa and 35oC with a velocity of 2 m/s through a 1-m diame
A J type thermocouple referenced at 70F has a measured emf of 2.878mV. What is the Tempature of the measured Junction?
A diatomic calorically perfect ideal gas in a piston-cylinder assembly undergoes a cycle. Find the specific heat transfer of the cycle.
Find how much should be cut off from free length of the spring to reduce the Fo from 40.49 to 31.3 lbf? Assuming that the lengths of Lo and Li stay the same.
Boron is diffused into highly pure germanium at 1000oC (Q = 105 kcal/mol; DO = 1.1 x 10 m2/sec). A steady surface concentration of 1.5 at.% B prevails at this temperature. a) After diffusing for &am
If the water is not to spill out of the tank once a steady-state free surface condition is reached, what is the largest acceleration (ax) permissible?
In a certain industrial dryer 4 kg/h of water is to be removed from a moist material. The drying is accomplished by passing air over this material.
Draw a sketch showing where those cracks initiate. and explain why do they devolop. and why they devolope at those particular points?