Engineering, 13.08.2021 03:00 okokalyssa

Refrigerant 134a is the working fluid in an ideal vapor-compression refrigeration cycle that communicates thermally with a cold region at -5 Â°C and a warm region at 35 Â°C. The vapor enters the compressor at -10 Â°C,1 bar. The liquid leaves the condenser at 9 bar, 30 Â°C. The compressor has an isentropic efficiency of 80%. The mass flow rate of the refrigerant is 0.08 kg/s. Determine (a) the compressor power, in kW, (b) the refrigeration capacity, in tons, (c) the coefficient of performance, (d) the heat transfer rate to the surrounding space, and (e) "rate of entropy production per cycle" (including compressor, evaporation, expansion vale, and condenser).

Answers: 3

Show answers

Another question on Engineering

Engineering, 04.07.2019 18:10

Adouble-strand no. 60 roller chain is used to transmit power between a 13-tooth driving sprocket rotating at 300 rev/min and a 52-tooth driven sprocket. a) what is the allowable horsepower of this drive? b) estimate the center-to-center distance if the chain length is 82 pitches. c) estimate the torque and bending force on the driving shaft by the chain if the actual horsepower transmitted is 30 percent less than the corrected (allowable) power.

Answers: 3

Answer

Engineering, 04.07.2019 18:10

Slip occurs via two partial dislocations because of (a) the shorter path of the partial dislocation lines; (b) the lower energy state through partial dislocations; (c) the charge balance.

Answers: 1

Answer

Engineering, 04.07.2019 19:10

Starting wih an energy balance on a rectangular volume element, derive the one- dimensional transient heat conduction equation for a plane wall with constant thermal conductivity and no heat generation.

Answers: 1

Answer

Engineering, 04.07.2019 19:10

Aplate of dimensions 3 m x 3 m is placed 0.37 mm apart from a fixed plate. the plate requires a force of 2n to move at speed of 45 cm/s. evaluate the viscosity of the fluid in between the plates

Answers: 3

Answer

You know the right answer?

Refrigerant 134a is the working fluid in an ideal vapor-compression refrigeration cycle that communi...

Questions