Required information A commercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -30°C by rejecting its waste heat to cooling water that enters the condenser at 18°C at a rate of 0.310 kg/s and leaves at 26°C. The refrigerant enters the condenser at 1.2 MPa and 65°C and leaves at 42°C. The inlet state of the compressor is 60 kPa and -34°C and the compressor is estimated to gain a net heat of 450 W from the surroundings. The heat exchanger loses no heat to the environment. 26°C 42°C Water 18°C 1.2 MPa 65°C 2 (3) Condenser ↑gin Expansion valve Evaporator Compressor 60 kPa -34°C 4 1 Οι Determine the quality of the refrigerant at the evaporator inlet. (Take the required values from saturated refrigerant-134a tables.) (Round the final answer to four decimal places.) The quality of the refrigerant at the evaporator inlet is

An ideal vapor compression cycle operates between the temperature limits of -5 °c and 30 °C and uses R134a as the refrigerant, which flows at a rate of 0.6 kg/s. The P-h- as well as T-s-diagrams that illustrate the refrigerating process is given in diagram, and respectively. Refigerant is compressed to the state in the compressor and heat is rejected in the condenser at constant for ideal Vapour compression cycle.

A vapor compression refrigeration cycle uses refrigerant-134a as its working fluid. The condenser pressure is 800 kPa and the evaporator temperature is -20 C. The compressor has an isentropic efficiency of 80 percent. The mass flow rate is 1.7489 kg/s. In the question that follows, select the answer that is closest to the true value. What is the heat going to the evaporator in units of kW?

A refrigerant 22 vapor compression system includes a liquid-to-suction heat exchanger in the system. The heat exchanger cools the saturated liquid from the condenser from 32°C to 21°C with vapor which comes from the evaporator at -10°C. The compressor is capable of pumping 20 L/sec of refrigerant. What is the enthalpy of the refrigerant at the suction of the compressor neglecting the heat exchanger? What is the isenthalpic value of the refrigerant in the system neglecting the heat exchanger? What is the refrigerant's enthalpy after compression? What is the COP of the system neglecting the heat exchanger? What is the enthalpy of the refrigerant before it enters in the expansion valve? What is the approximate enthalpy of the refrigerant at the suction of the compressor? What is the estimated enthalpy of the refrigerant after compression? What is the COP of the system? What is the refrigerating capacity of the system in TOR if: a.) without hex and b.) with hex?

Q/ Refrigeration system operates on a vapor - compression cycle with R-134a as the working fluid. The refrigerant enter the compressor as superheated vapor at 0.1 Mpa and is compressed to 1 Mpa .The superheat and subcooling are 10 C°. Mass flow rate of refrigerant is 0.05 kg/s. Determine :- x4, Qe, Qc, Wc & C.O.P.

An ideal vapor-compression refrigeration cycle that uses refrigerant-134a as its working fluidmaintains a condenser at 800 kPa and the temperature of the evaporator is -15 C. Given 300 kW ofcooling load, determine the following:3. Estimate the reversible COP values, if the low and high medium temperatures are as for theevaporator and condenser.4. Determine the Refrigeration effect (RE), heat of compression (HOC), and heat of rejection(HOR) and their corresponding rate/power values in kW.5. Estimate the COPR using thermodynamic tables and Calculate the COPR using the P-h chart and show the refrigeration cycle on the p-h chart.

Refrigerant 134a enters the compressor of a vapor-compression refrigeration cycle at 150 kPa as a saturated vapor and leaves at 850 kPa. The refrigerant leaves the condenser as a saturated liquid. The rate of cooling provided by the system is 7kW. a. Determine the mass flow rate of R-134a and the cop of the cycle. b. If the condenser pressure is changed to 950 kPa, find the cop of the cycle.

A Carnot vapor refrigeration cycle uses R-134a as the working fluid. The refrigerarit enters the condenser as saturated vapor at 28°C and leaves as saturated liquid. The evaporator operates at a temperature of -10°C. For every kg of refrigerant flow, calculate the work of compression, kJ

An ideal vapor-compression refrigeration cycle using refrigerant-134a as the working fluid is used to cool a brine solution to -5°C. This solution is pumped to various buildings for the purpose of air-conditioning. The refrigerant evaporates at -12.00°C with a total mass flow rate of 8.000 kg/s and condenses at 600 kPa. Determine the COP of the cycle and the total cooling load. (Take the required values from saturated refrigerant-134a tables.) The COP of the cycle is (Round the final answer to three decimal places.) and the total cooling load is kW.

mr-pant quest an ar IS SU you part. A commercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -35°C by rejecting waste heat to cooling water that enters the condenser at 18°C at a rate of 0.35 kg/s and leaves at 26°C. The refrigerant enters the condenser at 1.2 MPa and 50°C and leaves at the same pressure subcooled by 5°C. The compressor consumes 3.3 kW of power. Use data from the tables. 26°C 1.2 MPa 5°C subcooled Expansion valve Condenser Evaporator OL Water 18°C 1.2 MPa 50°C Compressor Determine the COP of the refrigerator. The COP of the refrigerator is (You must provide an answer before moving to the next part.)