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Assume constant specific heat ideal gas properties evaluated at 400 K. Find T2 in degrees K and heat transfer Q and the work W for this process in kJ.
Steam at T1=600 degrees C, P1=15 MPa enters a reversible and adiabatic turbine at a flow rate of 300 kg/s. The steam exits at a temperature of T2=20 degrees.
If the work output of the engine 1 is twice more than that of engine 2, determine a. the intermediate temperature b. the heat rejected to the cold sink c. the efficiency of each heat engine.
A heat-engine of 32% thermal efficiency is used to drive a refrigerator having coefficient of performance of 5. Determine the heat input into the engine for each MJ removed from the refrigerated spa
Cruising at 20.1 m/s (45 mph), the gage reads 14 inches of Hg (Mercury) vacuum. If the local atmospheric pressure is 99.5 kPa, what is the absolute intake manifold pressure in kPa. Show all your ste
A steel shaft 120 mm in diameter is supported in flexible bearings at its ends. Two pulleys, each 500 mm in diameter, are keyed to the shaft.
Does can the forklifts lift it up? Explain your answer with the positioning of the forklift. Can it both lift up in the middle of the shaft or does it both need to be spread evenly?
Then in another 4s it moves from Sb to Sc +2.5 m. Determine the particle's average velocity amd average speed during the 6-s time interval.
Find a unique four-bar mechanism; one that was not mentioned in class like the (vise grips). Sketch the mechanism and provide a short description about the function and purpose of your four-bar mech
The convection coefficient is 5.5 W/m^2 *k and radiation coefficient is 10 W/m^2 * k. Determine the heat rate per unit length from the pipe (W/M) and the insulation outer surface temperature (K).
2 Balloons filled with helium, made of latex, same unfilled thickness (2mm) & 3cm diameter released at sea-level. What h will the balloons explode?
The time t=30s the velocity = 26m/s and displacement at time t = Dt metres. Derive expressions for both velocity and displacement as a function of time t.
What is the maxium distance for which the device will work if the water is in a cavern with a pressure of 0.05 bar rather than being exposed to the atmoshpere?
What is the maxium distance between the top of the well and the water for which the device will work if the atmospheric pressure is 1 bar?
Find the net amount of new disorder created and the irreversibility of the process. What might account for the calculated irreversibility and how could it be reduced?
The inlet temperature is 1000 K and the exhaust pressure is 100 kPa. Find the required inlet pressure and the exhaust temperature. Assume air is an ideal constant-Cv0 gas.
10 kg of gaseous oxygen is compressed in a piston-cylinder device from an initial state of .8 m^3/kg, to a final state of .1 m^3/kg, 287 deg C, with all heat transfer taking place with the surroundi
If heat is also transferred to the cooler from the surroundings (at 15 deg C) at 25o kW, find the rate of heat transfer from the ball bearings and the rate of production of new disorder in this quen
Two flows of H2O, one of which is saturated vapor at .6 MPa and the other of which is at .6 MPa, 600 deg C, mix adiabatically in a steady-flow process to produce a single outflow at .6 MPa, 400 deg
It is estimated that the isentropic efficiency of the turbine is 70%. What is the maximum turbine inlet pressure if the exhaust is not to be in the two-phase region?
Steam flows steadily into a turbine at 2 MPa and 400 deg C, at a flow rate of 25 kg/s. If the turbine is adiabatic and the steam leaves the turbine at 100 kPa, what is the maximum power output of t
The tank then cools to the ambient temperature, at which point the pressure is 5 MPa. Find P2 an PS for the overall process. Assume air is an ideal constant-Cv0 gas.
Consider an air-standard Brayton cycle. What is the efficiency of the Brayton cycle if the pressure ratio is 20 and the specific heat ratio is 1.4?
Consider an air-standard Otto cycle. What is the efficiency of the Otto cycle if the compression ratio is 10 and the specific heat ratio is 1.4?
In a cogeneration scheme, a Diesel engine-generator is used. The Diesel engine-generator is rated at 2000 kWe. What is the total efficiency of the cogeneration scheme?