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In a refrigeration system Refrigerant 22 enters the compressor at 150 kPa and -10 C. It leaves the compressor at 1.0 MPa and 90 C. Assume the mass rate of flow through the compressor is 0.016 kg/s and that the power input to the compressor is 1 kW. The refrigerant leaving the compressor enters a water-cooled condenser at 1.0 MPa and 80 C and leaves the condenser as liquid at 0.90 MPa and 35 C. Liquid water enters the condenser at 10 C and leaves at 20 C (both in the compressed liquid state). Assume no pressure change of the water through the condenser. Assume all processes are steady and the all potential and kinetic energy changes are negligible. For the condenser assume no heat transfer with the surroundings.
a. determine the heat transfer rate from the compressor.
b. determine the rate at which cooling water flows through the condenser.
Measurements indicate that to cause this flow the force acting on the contents of the control volume is 40i lb. Determine the net rate of flow of linear momentum through the control surface.
A steel tank hold 120 ft^3 of water at atmospheric pressure(14.7psi and 68.4 degrees f). the water is subjected to a 100 fold increase in pressure. determine the initial weight and final density of the water if the volume decreases by .545 ft ^3.
Design a square column footing for a 18-in square tied interior column that supports a dead load D= 220 k and a live load L=180 k. The column isreinforced with eight bars, the base of the footing is 4 ft below grade
A complete mix activated sludge plant operates at design Q, with the reactor tank volume set by a nominal= 6 hours.. a) It was anticipated that it would operate at 25% RAS for an expected Xr= 2,000 mg/l. What would the actual be
If the time required to pay for parking is exponentially distributed with a mean of 15 seconds, find the average time in system.
A cylindrical pressure tank has internal dimensions of 14.0 inches diameter, and 36 inches length from end to end. Max. recommended pressure at 70degF is 200 PSI. The cylinder has a safety relief valve which is set at 250 PSI.
What pressure gradient is required to accelerate water vertically upward in a vertical pipe at a rate of 0.5g
design a square individual footing to support a 16 inch square reinforced concrete column. service loads include a dead load of 180 kips and a live load of 140 kips. both column and footing have fc=3000psi and fy=60000 psi.
determine the value of Po, as a funciton of H, for these two investment alternatives to be equivalent at an interest rate of i=15% per year.
The bar is 1m long and its weight, W, acts at its midpoint. The angle is a=30 degrees, and the the spring constant k= 100N/m. The spring in its current position is 1.52m long, and its unstretched length of 1.25 m occurs when the bar is vertical a=..
A differential leveling loop started and closed on BM Juno, elevation 5194.02 ft. The BS and FS distancces were kept approximately equal. Readings (in ft) listed in the order takken are 9.65, 2.11, 2.51, 8.35, 2.06, 9.25, 7.93, 2.83, 5.05, and 4.6..
A Ferris wheel with a radius of 35 feet starts from rest and undergoes an angular acceleration of 0.05 rad/s^2. Compute the magnitude of the velocity and acceleration vectors at 5 seconds for a point on the rim of the Ferris wheel.
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