automobile air conditioner that works according to the ideal vapor compression refrigeration cycle. Compressor R134 with a power of 1.5 KW from the engine crankshaft is compressed from 200 kpa to 1200 kPa with a belt pulley, while the outside air at 30 C decreases the actual temperature of 10C through the evaporator of the automobile air conditioning system and cooling is provided by giving the cabinet accordingly a) Mass flow rate of R134a b) evaporator power c) COP d) Calculate the volume flow rate of the blown air as m ^ 3 / h

automobile air conditioner that works according to the ideal vapor compression refrigeration cycle. Compressor R134 with a power of 1.5 KW from the engine crankshaft is compressed from 200 kpa to 1200 kPa with a belt pulley, while the outside air at 30 C decreases the actual temperature of 10C through the evaporator of the automobile air conditioning system and cooling is provided by giving the cabinet accordingly a) Mass flow rate of R134a b) evaporator power c) COP d) Calculate the volume flow rate of the blown air as m ^ 3 / h

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter45: Domestic Refrigerators And Freezers

Section: Chapter Questions

Problem 2RQ: The operating condition for the single compressor in a household refrigerator is the lowest box...

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Similar questions

The operating condition for the single compressor in a household refrigerator is the lowest box temperature, which is typically A. 0F B. -20F C. 20F D. 40F
When the outside ambient air temperature is 90F, the temperature of the condensing refrigerant in a standard- efficiency unit should be approximately A. 120F. B. 130F. C. 140F. D. 150F.
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There is a steam power cycle that uses water as the working fluid, where the condenser pressure is 20 kPa. The pressure in the boiler is 4 MPa. The steam that comes out of the boiler is saturated steam and the quality at the outlet of the turbine is x4 = 0.65. The water enters the pump as a saturated liquid and exits at a temperature of 48 ° C (T2). Determine a) Work at the pump b) Heat transfer in theboiler c) work on the turbine d) The heat in the condenser e) The thermal efficiency of the cycle
A refrigerator uses refrigerant-134a as the working fluid and operates on an ideal vapor compression refrigeration cycle between 0.18 and 0.7 MPa. The mass flow rate of the refrigerant is 72.4 g/s. Determine the power input to the compressor (in kW). Do not answer in image format
: Refrigerant 134a enters a compressor of a vapour compression of a refrigeration cycle at 120Kpa as a saturated vapour and leaves at 900 Kpa and 75oc. The refrigerant leaves the condenser as a saturated liquid. The rate of cooling provided by the system is 18000 Btu/hr. Determine (1) Mass flow rate of R134a (2) The Cop of the cycle (3) Also determine the Cop of the cycle if the expansion valve is replaced by an isentropic turbine. Do you recommend such a replacement for the refrigeration system? (4) Determine the Cop if the evaporator pressure is 160Kpa and otheer values remains the same. (5) Determine the Cop if the condenser pressure is 800 Kpa and other values remain the same.
A commercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -30°C by rejecting waste heat to cooling water that enters the condenser at 20°C at a rate of 0.25 kg/s and leaves at 28°C. The refrigerant enters the condenser at 1.2 MPa and 50°C and leaves at the same pressure subcooled by 5°C. If the Talking PIYATIDA TENURUK compressor consumes 3.7 kW of power, determine (a) the mass flow rate of the refrigerant (b) the refrigeration load (c) the COP (d) the minimum power input to the compressor for the same refrigeration load
An R-134a vapor compression cycle, has a refrigeration load of 3 tones. The evaporator and condenser temperatures are -20°C and 40°C respectively. Determine (a) the refrigerant flow rate in kg/s, (b) the volume flow rate handled by the compressor in m3/s, (c) work input to the compressor in kW, (d) heat rejected in the condenser in kW (e) the isotropic discharge temperature. If there is a 5°C of superheating of vapor before it enters the compressor, and 5°C sub cooling of liquid before it flows through the expansion valve, determine the above quantities. (Cp liquid and Cp vapor values are 0.963 and 0.6165 kJ/kg K respectively).
A refrigeration system operates on an ideal vapor compression using R-12 with an evaporator temperature of -30 C and a condenser exit temperature of 49.30C and requires 74.6 kW motor to drive the compressor. What is the capacity of the refrigerator in tons of refrigeration? Enthalpy at the condenser ,entrance = 382KJ/Kg, exit = 248.15KJ/Kg, at evaporator entrance= 248.15kJ/kg, exit =338.14kJ/kg.
Saturated vapor Freon 12 refrigerant at 219.12 kPa leaves the evaporator and enters the compressor at -5 °C. The refrigerant leaves the condenser as saturated liquid at 25°C and enters the ex pansion valve at 22°C. Heat rejected from the condenser amount to 75 kW. The work to the compressor is 55.5 kJ/kg, while the heat lost from the compressor is 4.2 kJ/kg. If 1.15 kJ/kg of heat are lost in the piping between the compressor and condenser, cal culate the refrigeration capacity in tons.