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Liquid water at 120°F and a mass flow rate of 3 ×105 lb/h enters a cooling tower operating at steady state. Liquid water exits the tower at 80°F. No makeup water is provided. Atmospheric air enters at 1 atm with a dry-bulb temperature of 70°F and a wet-bulb temperature of 60°F. Saturated air exits at 110°F, 1 atm. Ignoring kinetic and potential energy effects, determine the mass flow rate of the cooled water stream exiting the tower, in lb/h.
at the beginning of the compression stroke the volume of a certain diesel engine cylin-der is 1.000 liter and it is
A particular thermal system involves three objects of fixed shape with conduction resistances of R1 = 1 K/W, R2 = 2 K/W and R3 = 4 K/W, respectively. An objec- tive is to minimize the total thermal resistance Rtot asso- ciated with a combination of R..
steam enters a turbine with a pressure of 30 bar a temperature of 400 degc at a velocity of 160 ms. steam exits as
Water flows through the pipe at a constant average velocity of 0.5 m/s into the the tank having the width of 1.5 m. Determine the relation between the time needed to fill the tank to a depth of h = 3 m and the diameter D of the pipe at. Plot the time..
Air is contained in a piston-cylinder assembly, initially at 40 lbf/in^2 and 600R. The air expands in a polytropic process with n=k=1.4 until the volume is doubled. Modeling the air as an ideal gas with constant specific heats,
200mm DN pipeline has to deliver 80m³/h of water at a discharge pressure of 5,550 kPa. Approximately how many pump stations would be needed for a pipeline 300km long?
water vapor enters a compressor at 50 kpa and 150 c and leaves at 400 kpa with the same specific entropy as at the
Teresa measures the distance that a traverse system moves an object for a given computer-controlled input pulse. She makes 100 readings, and the mean value is 6.832 m with a sample standard deviation of 1.0 cm. The errors in the measurements are assu..
a submarine is cruising in the ocean at a depth of 320 m. salt water has a specific gravity of 1.03. determine the
water enters a condenser at a pressure of 200 kpa and a quality of 0.95. the pressure drops by 25 kpa across the
a piston cylinder arrangement contains 1.0 kg of nitrogen gas initially at 100 kpa and 27c. the gas will be compressed
a domestic water heater holds 189 l of water at 60 degrees c 1 atm. determine the exergy of the hot water in kj. to
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