A refrigeration system uses refrigerant-134a as the working fluid and operates on an idea vapour compression refrigeration cycle between 0.28 and 1.2 MPa. (a) Draw a labelled schematic of the system and a T-s diagram to describe the cycle (b) Determine the coefficient of performance of the refrigerator (c) Determine the COP of a reversed Carnot cycle operating within the same limits.

A refrigeration system uses refrigerant-134a as the working fluid and operates on an idea vapour compression refrigeration cycle between 0.28 and 1.2 MPa. (a) Draw a labelled schematic of the system and a T-s diagram to describe the cycle (b) Determine the coefficient of performance of the refrigerator (c) Determine the COP of a reversed Carnot cycle operating within the same limits.

Name: Mechanical EngineeringThermodynamicsTopic: Refrigeration Cycles A refr
Uploaded: 2022-11-23T13:49:29.000Z
Channel: Bartleby
Description: Mechanical EngineeringThermodynamicsTopic: Refrigeration Cycles A refrigeration system uses refrigerant-134a as the working fluid and operates on an idealvapour compression refrigeration cycle between 0.28 and 1.2 MPa.(a) Draw a labelled schematic of

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...

See similar textbooks

Similar questions

Refrigerators currently being manufactured in the United States are using______as their refrigerant.
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
Refrigerator 1 simulates an ideal refrigerator and therefore operates on a Carnot cycle using R-134a as the refrigerant at a flow rate of 1.4 kg/sec. The condensing and evaporating temperatures are 30 °C and -10 °C, respectively. To assess the performance of Refrigerator 1, you must submit the report. of the project with the following information: d) The work generated by the turbine; e) The condenser heat rejection rate (Q H); f) The coefficient of performance of the cycle.
. An ideal gas refrigeration cycle using air as the working medium is to maintain arefrigerated space at 0oF while rejecting heat to the surrounding medium at 80 oF.The pressureratio of the compressor is 4 . Determine the coefficient of performance . A) 3.5 B) 5.6 C) 3.06 D) 2.06
A standard vapor compression system produces 70.4 kW of refrigeration using R-12as a refrigerant while operating between a condenser temperature of 42 °C and anevaporator temperature of –25 °C.2.1 Draw the p-h diagram of the cycle. 2.2 Determine:(a) the refrigerating effect in kJ/kg, (b) the circulating rate in kg/s, (c) the power supplied, (d) the COP, (e) the heat rejected in kW, and(f) the volume flow rate in m3/s.
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
What is the COP of an ideal heat-operated refrigeration cycle that receives the energizing heat from a solar collector at a temperature of 70 °C, performs refrigeration at 15 °C, and rejects heat to atmosphere at a temperature of 40°C?
5- In a Carnot refrigeration machine using 0.78 kg refrigerant 134a as the working fluid, the net work input is 32 kJ. The ratio of the highest temperature (K) to the lowest temperature (K) of the cycle is 1.23. Which of the following is the heat drawn from the low temperature heat well for 1 kg of refrigerant? A) 178,37 kJ/kg B) 108,52 kJ/kg C) 52,60 kJ/kg D) 9,44 kJ/kg E) 139,13 kJ/kg
With diagram An ideal gas refrigeration cycle using air as the working medium is to maintain a refrigerated space at 0oF while rejecting heat to the surrounding medium at 80 oF. The pressure ratio of the compressor is 4 . Determine the coefficient of performance . A) 3.5 B) 5.6 C) 3.06 D) 2.06
Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.22 MPa and 27 C at a rate of 0.07 kg/s, and it leaves at 1.2 MPa and 73°C. The refrigerant is cooled in the condenser to 44°C and 1.16 MPa, and t is throttied to 0.21 MPa. Disregarding any heat transfer and pressure drops in the connecting lines between the components, show the cycle on a T-s diagram with respect to saturation lines, and determine (a) the rate of heat removal from the refrigerated space and the power input to the compressor, (b) the isentropic efficiency of the compressor, and (c) the COP of the refrigerator.
Refrigerant R134a is a working fluid in an ideal vapor-compression refrigeration cycle that communicate thermally with a cold region at 0 °C and a warm region at 26 °C. The fluid enters the compressor at 0 °C andleaves condenser at 26 °C. the mass flow rate of the refrigerant is 0.08 kg/s.Evaluate;i.the compressor powerii.The heat transfer of refrigerant andiii.Coefficient of performance, COP.iv.Compareand explainthe results above if the temperature of the cold region of refrigerant is -10 °C and pressure of condenser is 9 bar?
Consider a two-stage cascade refrigeration system operating between -80 o C and 80 o C. Each stage operates on an ideal vapor-compression refrigeration cycle. Upper cycle use R-12 as working fluid, lower cycle use R-13. In the lower cycle refrigerant condenses at 0 o C, in the upper cycle refrigerant evaporates at -5 o C. If the mass flow rate in the lower cycle is 1 kg/s, determine the mass flow rate through the upper cycle. Group of answer choices 1.56 kg/s 2.46 kg/s 1.78 kg/s 2.30 kg/s