Refrigerant 134a enters the evaporator of a refrigeration system operating at steady state at -4oC and...

Refrigerant 134a enters the evaporator of a refrigeration system operating at steady state at -4oC and a quality of 20% at a velocity of 6 m/s. At the exit, the refrigerant is a saturated vapor at -4oC. The evaporator flow channel has constant diameter of 1.7 cm. Determine the mass flow rate of the refrigerant, in kg/s, and the velocity at the exit, in m/s.

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samet mamat answered 2 years ago

refrigerant 134a enters the evaporator of a refrigeration system operating at steady state at -12°C and...

refrigerant 134a enters the evaporator of a refrigeration system operating at steady state at -12°C and a quality of 20% at a velocity of 7 m/s. At the exit, the refrigerant is a saturated vapor at -12°C. The evaporator flow channel has constant diameter of 1.7cm. Determine the mass flow rate of the refrigerant in kg/s Determine the velocity at the exit in m/s

Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -26oC with...

Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -26oC with a volumetric flow rate of 0.18 m3/s. Refrigerant exits at 8 bar, 70oC. Changes in kinetic and potential energy from inlet to exit can be ignored. Determine the volumetric flow rate at the exit, in m3/s, and the compressor power, in kW.

Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -20oC with...

Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -20oC with a volumetric flow rate of 0.18 m3/s. Refrigerant exits at 9 bar, 70oC. Changes in kinetic and potential energy from inlet to exit can be ignored. Determine the volumetric flow rate at the exit, in m3/s, and the compressor power, in kW.

Refrigerant 134a enters a horizontal pipe operating at steady state at 40°C, 300 kPa, and a...

Refrigerant 134a enters a horizontal pipe operating at steady state at 40°C, 300 kPa, and a velocity of 25 m/s. At the exit, the temperature is 70°C and the pressure is 240 kPa. The pipe diameter is 0.01 m. Determine: (a) the mass flow rate of the refrigerant, in kg/s, (b) the velocity at the exit, in m/s, and (c) the rate of heat transfer between the pipe and its surroundings, in kW.

Problem 4.016 SI Refrigerant 134a enters a horizontal pipe operating at steady state at 40°C, 300...

Problem 4.016 SI Refrigerant 134a enters a horizontal pipe operating at steady state at 40°C, 300 kPa, and a velocity of 25 m/s. At the exit, the temperature is 90°C and the pressure is 240 kPa. The pipe diameter is 0.1 m. Determine: (a) the mass flow rate of the refrigerant, in kg/s, (b) the velocity at the exit, in m/s, and (c) the rate of heat transfer between the pipe and its surroundings, in kW.

A vapor-compression refrigeration cycle operates at steady state with Refrigerant 134a as the working fluid. Saturated...

A vapor-compression refrigeration cycle operates at steady state with Refrigerant 134a as the working fluid. Saturated vapor enters the compressor at 2 bar, and saturated liquid exits the condenser at 10 bar. The isentropic compressor efficiency is 80%. The mass flow rate of refrigerant is 7 kg/min. Determine: (a) the compressor power, in kW. (b) the refrigeration capacity, in tons. (c) the coefficient of performance.

Refrigerant 134a at p1 = 30 lbf/in2, T1 = 40oF enters a compressor operating at steady...

Refrigerant 134a at p1 = 30 lbf/in2, T1 = 40oF enters a compressor operating at steady state with a mass flow rate of 400 lb/h and exits as saturated vapor at p2 = 160 lbf/in2. Heat transfer occurs from the compressor to its surroundings, which are at T0 = 40oF. Changes in kinetic and potential energy can be ignored. The power input to the compressor is 4 hp. Determine the heat transfer rate for the compressor, in Btu/hr, and the...

A steady-flow Carnot refrigeration cycle uses refrigerant-134a as the working fluid. The refrigerant changes from saturated...

A steady-flow Carnot refrigeration cycle uses refrigerant-134a as the working fluid. The refrigerant changes from saturated vapor to saturated liquid at 40 C in the condenser as it rejects heat. The evaporator pressure is 120 kPa. Determine: (a) the amount of heat absorbed from the refrigerated space; qL = _______________ kJ/kg (b) the net work input; and wnet = ______________ kJ/kg (c) the coefficient of performance of the system. COP = _____________

Refrigerant R-134a enters the compressor of a refrigeration machine at 140 kPa pressure and -10 °...

Refrigerant R-134a enters the compressor of a refrigeration machine at 140 kPa pressure and -10 ° C temperature and exits at 1 MPa pressure. The volumetric flow of the refrigerant entering the compressor is 0.23 m3 / minute. The refrigerant enters the throttling valve at 0.95 MPa pressure and 30 ° C, exiting the evaporator as saturated steam at -18 ° C. The adiabatic efficiency of the compressor is 78%. Show the cycle in the T-s diagram. In addition, a)...

A refrigeration system contains an adiabatic compressor with Refrigerant-134a as working fluid. Inlet conditions (state 1)...

A refrigeration system contains an adiabatic compressor with Refrigerant-134a as working fluid. Inlet conditions (state 1) are 140 kPa and -100C and the exit state is 1.6 MPa and 800C (state 2). The changes in KE and PE are negligible. Determine (a) actual exit specific enthalpy in kJ/kg, (b) exit specific isentropic entropy in kJ/lg.K and (c) efficiency of the compressor in %.

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