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Consider a Carnot heat pump cycle executed in a steady-flow system in the saturated liquid-vapor mixture region of R-134a. The R-134a is flowing at a rate of 0.264 kg/s. It is known that the maximum absolute temperature in the cycle is 1.25 times the minimum absolute temperature, and the net power input to the cycle is 7 kW. If the refrigerant changes from saturated vapor to saturated liquid during the heat rejection process, determine the ratio of the maximum and minimum pressures in the cycle. HINT: Recall that hfg = hg – hf
consider two-dimensionallaminar unidirectional flow between parallel spacing 2hvertical plates. one plate to the left
White noise has a constant level when measured in frequency bands of constant width. Suppose a noise generator produces white noise over the octave bands 0.5,1,2,4,8 khz. Find the overall un weighted and a-weighted sound pressures if a sound pressure..
an electric wire made of c14500 copper is stretched between two street supports at 20degc so that a stress of 40 mpa is
a piston-cylinder contains 0.8 kg of nitrogen initially at 100 kpa and 27 degrees. the nitrogen is compressed slowly in
a thin flat plate is installed in a water tunnel as a splitter. the plate is 0.3 m long and 1 m wide. the freestream
Calculate the specific heat at constant pressure, and specific heat at constant volume for propane which is compressed at the following inlet condition;
steam at 5mpa at 500 degrees enters a nozzle steadily with velocity of 80ms and leaves it at 2mpa at 400 degrees. the
two spinning discs have the same angular momentum, but disk 1 has more kinetic energy than disk 2. Which one has the bigger moment of inertia - explain your reasoning?
Electronic components are mounted on the inner surface of a horizontal cylindrical duct whose inner diameter is 0.2 m, as shown in Fig. P6.96. To prevent overheating of the electronics, the cylinder is cooled by a stream of air flowing through it and..
Acceleration was uniform. If it assumed that the acceleration was uniform where the magnitute of the volocity of an airplane was changed from 120mph to 360mph in 6 seconds.
air at 30 celcius and 2 mpa flows at steady state in a horizontal pipeline with a velocity of 25ms . it passes through
consider a large cubic ice block floating in seawater. the specific gravities of ice and seawater are 0.92 and 1.025
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