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A heat pump operates on the ideal vapor compression refrigeration cycle with R-134a as the working fluid between the pressure limits of 0.32 MPa and 1.4 MPa. If the mass flow rate of the refrigerant is 0.25 kg/s,Find the rate of heat supply by the heat pump to the heated space.
design a turbojet engine to flight at an altitude of 10000m. the pressure ratio across the compressor is 3. the
a gas that is contained in a cylinder undergoes two processes that are in series. the first process from 1 to 2 consist
what is the reason for the change in enthalpy between the throttle valve and the evaporator in a practical refrigeration cycle that is using R12 refrigerant.
some hypothetical metal has the simple cubic crystal structure i.e. atoms positioned at each of the eight corners with
helium at 810 r 45 ibfin2 and a velovity of 10 fts enters an insulated nozzle operating at steady state and exits at
a cylindrical tank of methanol has a mass of 40 kg and a volume of 51 l. determine the methanols weight density and
determine the power needed to drive the low speed turbine given maximum velocity in the test section 140 mih with 12 x
a pulley 250 mm in diameter drives a second pulley 1000 mm in diameter by means of a belt. the moment of inertia of the
estimate the activation energy for creep for the low carbon nickel alloy using the following temperature dependence of
calculate the specific exergy for i water and ii r-134a and iii air at p 0.6 bar and t 10oc. assume to 20oc and po
steel rods of 0.05m diameter are heat treated by being passed through a heat-treating furnace in which the atmosphere
an adiabatic heat exchanger is used to heat cold water at 8 deg c entering at a rate of 3kgs by hot air at 150 deg c
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