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An empty cannister of volume 1 L is filled with R-134a from a line flowing saturated liquid R-134a at 0oC. The filling is done quickly so it is adiabatic
An elastic balloon behaves such that pressure is proportional to diameter and the balloon contains 0.5 kg air at 200 kPa
An adiabatic heat exchanger is used to heat cold water at 15°C entering at a rate of 5 kg/s by hot water at 90°C entering at a rate of 4 kg/s.
An air compressor receives atmospheric air at T0 = 17°C, 100 kPa, and compresses it up to 1400 kPa. The compressor has an isentropic efficiency of 88%
An adiabatic constant-volume tank contains a mixture of 1 kmol of hydrogen (H2) gas and the stoichiometric amount of air at 25°C and 1 atm
A pure copper sphere of radius 1 cm is dropped into an agitated oil bath that has a uniform temperature of 130C. The initial temperature of copper sphere is 20C
An air-conditioning system operates at a total pressure of 1 atm and consists of a heating section and a humidifier that supplies wet steam
If the temperature of the outdoors is 35°C, the power required to operate this air-conditioning system.
An air-conditioner provides 1 kg/s of air at 15°C cooled from outside atmospheric air at 35°C. Estimate the amount of power needed to operate
An air conditioner removes heat steadily from a house at a rate of 750 kJ/min while drawing electric power at a rate of 6 kW Determine
An air conditioner cools a house at TL = 20°C with a maximum of 1.2 kW power input. The house gains 0.6 kW per degree temperature difference to the ambient
An air compressor takes in air at 100 kPa, 17°C and delivers it at 1 MPa, 600 K to a constant-pressure cooler, which it exits at 300 K
A solid food is being cooled in a cylindrical can of dimensions 12 cm diameter and 3 cm thickness. The cooling medium is cold water at 2C
An air-standard cycle is executed in a closed system with 0.004 kg of air and consists of the following three processes:
An air-standard cycle with variable specific heats is executed in a closed system with 0.003 kg of air, and it consists of the following three processes:
An air-standard Carnot cycle is executed in a closed system between the temperature limits of 350 and 1200 K
Air whose density is 0.078 lbm/ft3 enters the duct of an air-conditioning system at a volume flow rate of 450 ft3/min.
An air-conditioning system requires a 20-m-long section of 15-cm diameter duct work to be laid underwater. Determine the upward force the water will exert
An air-conditioning system operating on the reversed Carnot cycle is required to transfer heat from a house at a rate of 750 kJ/min to maintain its temperature
Ambient air at 100 kPa, 30°C, 40% relative humidity goes through a constant pressure heat exchanger in a SSSF process
Ambient air at 100 kPa and 300 K is compressed isentropically in a steady-flow device to 1 MPa. Determine
Airplane takeoff from an aircraft carrier is assisted by a steam driven piston/cylinder with an average pressure of 750 kPa
Air leaves the compressor of a jet engine at a temperature of 300 F, a pressure of 45lbf/in2, and a velocity of 400 ft/s.
Air is to be compressed steadily and isentropically from 1 atm to 25 atm by a two-stage compressor
Ammonia is contained in a rigid sealed tank unknown quality at 0oC. When heated in boiling water to 100oC its pressure reaches 1200 kPa