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The heat engine does maximum work equal to 600kJ. Determine the heat supplied to the heat engine, heat rejected to the heat sink, and the temperature of the heat sink.
A household refrigerator that has a power input of 450 W and a COP of 2.5 is to cool five large watermelons, 10 kg each, to 8 degrees celsius. if the watermelons are initially at 20 degrees celsius.
A highway curve with a radius of 1200 Ft is designed in such a way that the maximum safe speed for a car on this curve should have a normal acceleration no greater than 7ft/sec^2. What is the maxim
If the pressure distribution on the front of the disk is of the form p(r) = 2.5 - 10r2 kN/m2, find the drag contribution on the front side.
Determine the temperature distribution along the fin and the total heat transfer rate from the fin to the surroundings. State any assumptions you make clearly.
The power P required to drive a fan is believed to depend on density p, flow rate Q, impeller dia. D, and angular veloctiy w in Hz.
A particular coal has the following mass analysis: inert ash, 10 percent; nitrogen, 2 percent; oxygen, 12 percent; sulfur 1 percent; hydrogen 5 percent; and, carbon, 70 percent. For complete combust
An axial flow compressor stage has blade root,mean and tip velocities of 150,200 and 250 m/s. The stage is to be designed for a stagnation temperature rise of 20K and axial velocity of 150 m/s, both
A stream of gaseous propane is burned with air in an adiabatic and zero-work steady flow process. The reactants enter at 298 K and 1 atm. The products pressure also is 1 atm. Calculate the adiabati
Determine the intermediate pressures that minimize the total work input. How can you generalize this to n-stage compression with intercooling?
A tunnel 150 m long, 7.2 m high and 5.8 m wide ( with a flat roof) is to be constructed 60 m beneath the ground. The tunnel roof is to be supported entirely by square steel columns, each with a cros
AC has a diameter of 0.5 in L=5in, and CDB has a diameter of 1 in Lcd=8 in Ldb=12 in. If it is fixed at its ends A and B and subjected to a torque of 500 lb-ft, determine The reaction Torques at A and
Compare the turbine exit quality for a simple cycle (without reheat) with that for the low-pressure turbine exit quality of a reheat cycle where the exit at 0.8 MPa of the high-pressure turbine is r
The extraction steam from the turbine enters the heater at 4 MPa, 275°C, and leaves as saturated liquid. What is the required mass flow of the extraction steam (kg/s)?
The isentropic efficiencies of the turbine and pump are 85% and 82% respectively. Determine the turbine exit quality and the cycle efficiency.
Explain the differences between the Otto, Diesel and Stirling reciprocating cycles . Discuss the application and energy sources for all three cycles.
Determine the outlet steam temperature, the turbine power output, and the specific entropy change for the turbine process, neglecting ΔKE and ΔPE.
You as a project manager have been successful in communicating and receiving feedback from your entire clients except one. This client has been a nagging problem. What should you do?
Describe some of the important steps in the preparation of a written document. What role do written documents play in the communication process?
A four cylinder four-stroke internal combustion spark-ignition engine operates on the ideal cycle (the Otto cycle). The engine has a bore of 3.5 in and a stroke of 3.5 in.
Describe the basics of the Carnot cycle of thermodynamics and it's application to heat engines such as Diesel Engines and Gas Turbines.
Determine the pressure drop across the contraction section. How much of this pressure difference is due to losses and how much is due to kinetic energy changes.
For operation at steady state, determine the net power input, in kW per kW of cooling, required by (a) the actual refrigeration cycle and (b) the reversible refrigeration cycle. Compare values.
The heat transfer rate through the walls and roof of a building is 3570 kJ/h per degree temperature difference between the inside and outside. For outdoor temperatures ranging from 20 to -20 degrees
The cutting force F_c is found to be 1780N (400lb) and the normal force F_t is 890 N(200lb). The rake angle of the tool is +8 degrees. Find the power required for the cut in KW (hp).