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1. Steam at 550 lbf/in.2, 7008F enters an insulated turbine operating at steady state with a mass flow rate of 1 lb/s. A two-phase liquid-vapor mixture exits the turbine at 14.7 lbf/2 (d) the rate of entropy production, in kW/K, for an enlarged control volume that includes the pipe and enough of its immediate surroundings so that heat transfer from the control volume occurs at 300 K.
2. Air at 500 kPa, 500 K and a mass flow of 600 kg/h enters a pipe passing overhead in a factory space. At the pipe exit, the pressure and temperature of the air are 475 kPa and 450 K, respectively. Air can be modeled as an ideal gas with k 5 1.39. Kinetic and potential energy effects can be ignored. Determine at steady state, (a) the rate of heat transfer, in kW, for a control volume comprising the pipe and its contents, and (b) the rate of entropy production, in kW/K, for an enlarged control volume that includes the pipe and enough of its surroundings that heat transfer occurs at the ambient temperature, 300 K.
Steam at 3 MPa, 400C enters a turbine with a volume flow rate of 5 m^3/s. An extraction of 15% of the inlet mass flow rate exits at 600 KPa, 200C. The rest exits the turbine at 20KPa with a quality of 90% and a velocity of 20 m/s. Determine the volum..
Consider the following Dornbusch model under perfect foresight
A cylindrical tank of diameter 1 m has a well-rounded orifice of diameter 2 cm in its base. How long will it take an initial depth of acetone equal to 2 m to drain completely from the tank? How long would it take if the orifice were sharp-edged? If n..
a system executes a power cycle while receiving 1050 kj by heat transfer at a temperature of 525 k and discharging 700
A material with a true stress strain curve? = 350 E0.25 MPa is used in wire drawing. Calculate the maximum reduction in cross sectional area per pass based on ideal conditions.
an hydraulic turbine operates under an available head of 85 m at a flow rate of 0.25 m3s. the electrical power output
The subsidized cost of producing water at the El Paso Water Utilities (EPWU) Kay Bailey Hutchison (KBH) desalting plant is $1.56 per 1000 gallons. Under a contract that EPWU has with Fort Bliss, the utility sells water to the Army post at a discounte..
determine the resultant internal normal force acting on the cross section through point of the signpost. the post is
Water Distribution: Assume that the pipe has a 12” diameter, is plastic with C = 140 and has a total elevation change of 20 ft. How much energy is required per year to pump the water through the pipe to the customer? Assume that your pump is 80% effi..
Design value for the molded friction material and steel disks to be used 0.06 and pressure max=1400kpa. Determine appropriate values for the disk inside dimmeter, the total number of disks and the actuating force?
a 700 kg automobile is traveling at 30 msec when it suddenly applies its breaks and lock the wheels. when this happens
a discuss the assumption that when a piece of metal is deformed at constant temperature its volume is unchanged.b a
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