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Air flows through a refrigeration cycle consisting of three processes: Process 1-2 is an isothermal expansion from a pressure of 6.25 bar; Process 2-3 is an adiabatic compression to a temperature of 550 K and a pressure of 6.25 bar; Process 3-1 is a constant pressure cooling. (a) Determine the temperature at state 1. (b) Determine the coefficient of performance of the cycle. Hint: Process 1-2 is the heat input from the cold state process for the cycle.
a circular tube of outer diameter 5 cm and inner diameter 4 cm is used to convey hot fluid. the inner surface of the
a heat pump has a second law efficiency of of 74. it supplies heat to a room at a rate of 46000 btuhr in order to
A steam powered catapult on an aircraft carrier sends a 60,000-lb aircraft 250 feet, from zero to 180 mph. Assuming that the acceleration is constant, A) determine the time for taxing. B) Determine the acceleration of the aircraft. C) Determine the f..
a titanium alloy with a modulus of elasticity of 16 x 106 psi is used to make a 1000 lb part for a manned space
a refrigeration system using r-22 as the working fluid has condenser and evaporator pressures of 250 psi and 30 psi
a four cylinder 2.4 liter engine operates on a four stroke cycle at 3200 rpm. the compression ratio is 9.41 the
the cylinder-piston arrangement contains carbon dioxide at 300kpa and 200 degrees celsius and the volume 0.2m3. weight
a 40kn axial load is applied to a short wooden post that is supported by a concrete footing resting on undisturbed
calculate the flowrate throught this pipeline and nozzle assuming no frictional energy losses i.e. ideal. calculate the
A compressor is employed to compress gas flowing steadily through it . The gas enters the compressor at a temperature of 16°C, a pressure of 100 kPa, and with an enthalpy of 391.2 kJ/kg. The gas leaves the compressor at a temperature of 245°C, a pres..
A hypothetical element has an atomic weight of 91.6 g/mol, a density of 9.60 g/cm3, and an atomic radius of 0.137 nm. Determine whether its crystal structure is FCC, BCC, or simple cubic.
(a) Draw and label a schematic of the system. (b) Determine the mass flow rate (kg/s) of water vapor neededand (c) the rate of exergy destruction (kW)
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