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Calculate the overall efficiency of the unit. Compare this to the efficiency of a Carnot cycle operating entirely inside the saturation dome, between the same maximum and minimum pressures. State wh
You are designing a remote-area power supply based on a miniature wind turbine that is 20% efficient. Meteorological data indicates an average wind speed of 24Km/h at an air temperature of 10 degree
Determine in a steady state heat transfer through a 2.4in thick homogenous trapezodial flap with its faces maintained at temperature of 120oF and 70oF.
How do you plot an isentropic compression process on a Pressure-Enthalpy diagram? I know how to do it on a Enthalpy-Entropy diagram but not a Pressure-Enthalpy one.
Calculate the composition of both elements, in mass percent, if the alloy consists of 87 atom percent Ag and 13 atom percent Cu.
A mixture of propane and butane is burned with pure oxygen. The combustion products contain 47.4 mole% H2O. What is the mole percent of propane in the fuel?
A closed gaseous system undergoes a reversible process in which 35 kJ of heat is rejected and the volume changes from 0.26 m3 to 0.14 m3. The pressure is constant at 160 kPa.
Five pounds of propane have a volume of 1 ft3 and a pressure of 600 psi. Determine the temperature (in °R) using each of the following methods. Comment on how the answers compare
The Question is: During the compression of 0.6 kg of gas in a cylinder, an amount of work equal to 80 kJ is supplied to the system. The internal energy of the gas rises from 65 kJ/kg to 178 kJ/kg.
There is no significant change in kinetic energy and no heat is transfered during the process. Determine the power required by the pump, in kW. Let g = 9.81 m/s^2.
A catheter is a specialised needle intended for long-term insertion into a vein in a patient's arm. Engineers are redesigning them to cause less discomfort and damage.
If ice is to be produced at a rate of 3500kg/hour, what is the rate of entropy generation for this process? h(i f) water= 333.7 kJ/kg.
a flow of liquid water at 5 MPa, 40°C are mixed. If saturated water vapor at 4.5 MPa is desired, what is the required flow rate of liquid water (kg/s)?
Methane is preheated to 80 C degree and is burned in 20 percent excess air that is preheated 200 C degree in a adiabatic furnace.
A plastic ring (or hula-hoop) is thrown to the right with a velocity of 8m/s, and it moves in such a way that it produces a counterclockwise rotation at an angular velocity of 4 rad/s.
Determine the mass of helium withdrawn (lbm) and the heat input to the resistor (Btu). Note that the problem can be worked without explicitly using values for enthalpy and internal energy.
Calculate the total mass that has escaped when the tank pressure reaches 1 MPa. Note that value of the saturated vapor enthalpy leaving the tank changes as the pressure drops.
The length of a cast iron pipe is to be 4200 ft. the head causing flow is to be 12.6 ft. after the pipe has been in service for 5 years, it is expected to discharge water at a rate equal to 3.2 cfs
How is diffusion time related to diffusion temperature for the case where the concentration at some distance into an inifintely thick solid is the same? Give an example.
A thick cylindrical sleeve, when shrunk onto a hollow shaft of a different material had its internal diameter extended by 0,2mm. The shaft has an internal diameter of 100mm and the internal and exte
The shelf and bracket have a combined mass of 5 kg with a mass center at Gp and the motor has a mass of 18 kg with the center at Gm. Draw an appropriate free body diagram of the shelf system.
A 100ft cable is made using a 12-gauge (0.1055in) steel wire and three strands of 10gauge (.1019in) copper wire. Find the deflection of the cable and the stress in each wire if the cable is subject
Ben Johnson set a world record of 9.83 seconds in the 100-meter dash on August 31, 1987. He had also set the record for the 60-meter dash of 6.40 seconds that same year.
Steam at 1.6MPa and 400 degrees C is contained in a rigid box. The system is then cooled to 200 degrees C. Compare the Amount of heat that needs to be removed by using (a) specific heats versus (b)