A vapor-compression refrigeration system operates on the cycle shown below. The refrigerant is tetrafluoroethane. For the following set of operating conditions, determine the circulation rate of the refrigerant, the heat-transfer rate in the condenser, the power requirement, the coefficient of performance of the cycle, and the coefficient of performance of a Carnot refrigeration cycle operating between the same temperature levels. Use the table containing the properties of saturated 1,1,1,2-tetrafluoroethane (R134A) and the PH diagram for tetrafluoroethane (HFC-134a). Condenser Throttle valve Compressor Evaporator Vapor-compression refrigeration cycle. Evaporation T= 0°C Condensation T= 26°C n(compressor) = 0.79 Refrigeration rate = 600 kJ-s1 The circulation rate of the refrigerant is | |kg-s-1 The heat-transfer rate in the condenser is kJ-s-1 The power requirement is kW. The coefficient of performance of the cycle is[

A vapor-compression refrigeration system operates on the cycle shown below. The refrigerant is tetrafluoroethane. For the following set of operating conditions, determine the circulation rate of the refrigerant, the heat-transfer rate in the condenser, the power requirement, the coefficient of performance of the cycle, and the coefficient of performance of a Carnot refrigeration cycle operating between the same temperature levels. Use the table containing the properties of saturated 1,1,1,2-tetrafluoroethane (R134A) and the PH diagram for tetrafluoroethane (HFC-134a). Condenser Throttle valve Compressor Evaporator Vapor-compression refrigeration cycle. Evaporation T= 0°C Condensation T= 26°C n(compressor) = 0.79 Refrigeration rate = 600 kJ-s1 The circulation rate of the refrigerant is | |kg-s-1 The heat-transfer rate in the condenser is kJ-s-1 The power requirement is kW. The coefficient of performance of the cycle is[

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

Chapter22: Condensers

Section: Chapter Questions

Problem 7RQ: When a standard-efficiency air-cooled condenser is used, the condensing refrigerant will normally be...

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A vapor-compression refrigeration system operates on the cycle shown below. The refrigerant is tetrafluoroethane. For the following set of operating conditions, determine the circulation rate of the refrigerant, the heat-transfer rate in the condenser, the power requirement, the coefficient of performance of the cycle, and the coefficient of performance of a Carnot refrigeration cycle operating between the same temperature levels. Use the table containing the properties of saturated 1,1,1,2-tetrafluoroethane (R134A) and the PH diagram for tetrafluoroethane (HFC-134a). (Include a minus sign if required.) T 4 S Vapor-compression refrigeration cycle. Evaporation T = -6°C Condensation T = 26°C 2 4 Throttle valve Condenser 3 Compressor Evaporator 2 n(compressor) = 0.78 Refrigeration rate = 500 kJ.s-1 The circulation rate of the refrigerant is 3.18 kg-s-1. The heat-transfer rate in the condenser is -607.6 kJ.s-1 The power requirement is 103.2417 KW. The coefficient of performance of the…
The circulation rate of the refrigerant is The heat-transfer rate in the condenser is The power requirement is kW. kg-s-1 KJ-s-1
A vapor-compression refrigeration system operates on the cycle shown below. The refrigerant is tetrafluoroethane. For the following set of operating conditions, determine the circulation rate of the refrigerant, the heat-transfer rate in the condenser, the power requirement, the coefficient of performance of the cycle, and the coefficient of performance of a Carnot refrigeration cycle operating between the same temperature levels. Use the table containing the properties of saturated 1,1,1,2-tetrafluoroethane (R134A) and the PH diagram for tetrafluoroethane (HFC-134a). (Include a minus sign if required.) S Vapor-compression refrigeration cycle. Evaporation T= -12°C Condensation T = 26°C n(compressor) = 0.77 Refrigeration rate = 400 kJ-s-1 The circulation rate of the refrigerant is The heat-transfer rate in the condenser is 4 KW. Throttle valve Condenser Evaporator kg-s -1 Compressor KJ-s-1 2 The power requirement is The coefficient of performance of the cycle is The coefficient of…
The values of a vapor compression refrigeration cycle were given below. Calculate the values ofrefrigerant flow rate, refrigeration capacity, and the COP of the system.T1= Evaporator water outlet = 10 °CT2= Evaporator water inlet = 16 °CT3= Condenser water inlet = 16 °CT4= Condenser water outlet = 22°CCooling water flow rate = 1.5 L/minHeating water flow rate = 1.5 L/minEnthalpy of R134a in evaporator outlet = 305 kj/kg,Enthalpy of R134a in evaporator inlet =115 kj/kgEnthalpy of R134a in condenser inlet =327 kj/kg
A two stage refrigeration cycle is shown in fig. B. The working fluid is refrigerant 134a. The interchanger is a heat exchanger where the heat absorbed by the refrigerant in the higher-temperature cycle 2 serves to condense the refrigerant in the lower-temperature cycle 1. The refrigerant in cycle 1/2 leaves the interchanger as saturated liquid/vapor. The corresponding temperatures of saturation are 5.12 ℉ / 0 ℉. The saturation temperature in the evaporator is -40 ℉. The pressure in the condenser is 60 psia. The compressor in cycle 1 operates isentropically. The compressor in cycle 2 has an isentropic efficiency of 80%. (a) Sketch the cycle in a T-s diagram and determine the enthalpy at each point of the cycle. (b) Calculate the ratio of the mass flow rates of the refrigerant in the two cycles. (c) Calculate the coefficient of performance of this refrigeration cycle.
4. The values of a vapor compression refrigeration cycle were given below. Calculate the values of refrigerant flow rate, refrigeration capacity, and the COP of the system. T1= Evaporator water outlet = 10 °C T2= Evaporator water inlet = 16 °C T3= Condenser water inlet = 16 °C T4= Condenser water outlet = 22°C Cooling water flow rate = 1.5 L/min Heating water flow rate = 1.5 L/min Enthalpy of R134a in evaporator outlet = 305 kj/kg, Enthalpy of R134a in evaporator inlet =115 kj/kg Enthalpy of R134a in condenser inlet =327 kj/kg
Q2/ A vapor-compression refrigeration system operates on the cycle. The refrigerant is tetrafluoroethane. For Evaporation T = 0°C; condensation T = 26°C; n(compressor) = 0.79; refrigeration rate = 600 kJ-s—1., determine the circulation rate of the refrigerant, the heat-transfer rate in the condenser, the power requirement, the coefficient of performance of the cycle