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Refrigerant R134a is compressed under steady conditions from a saturated vapour at 100 kPa to 500 kPa. The compressor’s isentropic efficiency is 85%. Heat losses from the compressor can be ignored, as can kinetic energy and potential energy effects.
Determine the temperature of the refrigerant exiting the compressor.
consider a carnot-cycle refrigerator with ammonia as the working fluid. heat is rejected from the ammonia at 20 deg c
question 1 evaluate distribution of shear force bending moment and stress due to bending in the simply supported beam
Two spheres are hanging from cords. The distance from the ceiling to the center of each sphere is 2m, and the coefficient of restitution is 0.75. If sphere “A” (mA = 2kg) is drawn back 60o and released from rest,
a rotating shaft has power transferred into a gear at b by a bevel gear resulting in a steady radial force f1100lb and
Water is being heated in a vertical piston-cylinder device. The piston has a mass of 20 kg and a cross-sectional area of 100 cm2. If the local atmospheric pressure is 100 kPa, determine the temperature at which the water starts boiling.
a gas that is contained in a cylinder undergoes two processes that are in series. the first process from 1 to 2 consist
the outdoor air temperature is 6 degrees c while a building maintains the inside temperature at 22 degrees c and loses
100 kmol/h of biogas (75 mol% CH4 and 25 mol% CO2) is produced in a digester and is drawn off from the headspace under a slight vacuum and piped to a natural gas burning boiler. A slight leak develops in the pipe allowing air (79 mol% N2 and 21 mol% ..
A heat engine operates between two temperature limits of 1200 K and 300 K. It receives 1 MJ of heat while producing 450 kJ of useful work.
calculate the span of a differential pressure transmitter that is mounted 10 inches below the bottom instrument tap on
an electron is released from rest at the negative plate of a parallel plate capacitor and accelerates to the positive
air at 30 celcius and 2 mpa flows at steady state in a horizontal pipeline with a velocity of 25ms . it passes through
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