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A refrigerator operating on the vapor-compression refrigeration... | Filo

A refrigerator operating on the vapor-compression refrigeration... | Filo

5.7K viewsNov 5, 2023

SOLVED:A vapor-compression cycle refrigerator using R-22 as the working fluid has an evaporator temperature of -30.0^∘ C and a condenser temperature of 50.0^∘ C. The refrigerant enters the compressor at 7.50 kg / min as a saturated vapor and exits the condenser as a saturated liquid. The isentropic efficiency of the compressor is 82.5%. Determine a. The coefficient of performance for the system. b. The coefficient of performance for a reversed Carnot cycle with the same temperature limits. c. T

SOLVED:A vapor-compression cycle refrigerator using R-22 as the working fluid has an evaporator temperature of -30.0^∘ C and a condenser temperature of 50.0^∘ C. The refrigerant enters the compressor at 7.50 kg / min as a saturated vapor and exits the condenser as a saturated liquid. The isentropic efficiency of the compressor is 82.5%. Determine a. The coefficient of performance for the system. b. The coefficient of performance for a reversed Carnot cycle with the same temperature limits. c. T

A refrigerator that operates on the ideal vapor compression cycle with refrigerant-134a is to maintain the refrigerated space at -10°C while rejecting heat to the environment at 25°C. Select reasonable pressures for the evaporator and the condenser, and explain why you chose those values.

A refrigerator that operates on the ideal vapor compression cycle with refrigerant-134a is to maintain the refrigerated space at -10°C while rejecting heat to the environment at 25°C. Select reasonable pressures for the evaporator and the condenser, and explain why you chose those values.

An ideal vapor-compression refrigeration cycle that uses refrigerant-134a as its working fluid maintains a condenser at 800 kPa and the evaporator at -12^∘ C. Determine this system's COP and the amount of power required to service a 150 kW cooling load. | Numerade

An ideal vapor-compression refrigeration cycle that uses refrigerant-134a as its working fluid maintains a condenser at 800 kPa and the evaporator at -12^∘ C. Determine this system's COP and the amount of power required to service a 150 kW cooling load. | Numerade

A refrigerator operates on the ideal vapor-compression refrigeration cycle with refrigerant- 134 a as the working fluid. The refrigerant evaporates at -10^∘ C and condenses at 57.9^∘ C.The refrigerant absorbs heat from a space at 5^∘ C and rejects heat to ambient air at 25^∘ C. Determine (a) the cooling load, in kJ / kg, and the COP,(b) the exergy destruction in each component of the cycle and the total exergy destruction in the cycle, and (c) the second-law efficiency of the compressor, the eva

A refrigerator operates on the ideal vapor-compression refrigeration cycle with refrigerant- 134 a as the working fluid. The refrigerant evaporates at -10^∘ C and condenses at 57.9^∘ C.The refrigerant absorbs heat from a space at 5^∘ C and rejects heat to ambient air at 25^∘ C. Determine (a) the cooling load, in kJ / kg, and the COP,(b) the exergy destruction in each component of the cycle and the total exergy destruction in the cycle, and (c) the second-law efficiency of the compressor, the eva

A vapor-compression refrigeration system operates on the cycle of Fig. 9.1 . The refrigerant is tetrafluoroethane (Table 9.1, Fig. G.2). For one of the following sets 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. (a) Evaporation T / t=272.15 K(-1^

A vapor-compression refrigeration system operates on the cycle of Fig. 9.1 . The refrigerant is tetrafluoroethane (Table 9.1, Fig. G.2). For one of the following sets 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. (a) Evaporation T / t=272.15 K(-1^

A refrigerator operating on the vapor-compression refrigeration cycle using refrigerant-134a as the refrigerant is considered. The temperature of the cooled space and the ambient air are at 10^∘ F and 80^∘ F, respectively. R-134 anters the compressor at 20 psia as a saturated vapor and leaves at 140 psia and 160^∘ F. The refrigerant leaves the condenser as a saturated liquid. The rate of cooling provided by the system is 45,000 Btu/h. Determine ( a ) the mass flow rate of R-134 and the COP, (b)

A refrigerator operating on the vapor-compression refrigeration cycle using refrigerant-134a as the refrigerant is considered. The temperature of the cooled space and the ambient air are at 10^∘ F and 80^∘ F, respectively. R-134 anters the compressor at 20 psia as a saturated vapor and leaves at 140 psia and 160^∘ F. The refrigerant leaves the condenser as a saturated liquid. The rate of cooling provided by the system is 45,000 Btu/h. Determine ( a ) the mass flow rate of R-134 and the COP, (b)

A vapor compression refrigeration cycle using R-134 a executes four processes: Process 1-2 An isentropic compression, T1=-8^∘ C and s1=0.9066 kJ / kg-K . to T2=31.33^∘ C and s2=0.9066 kJ / kg-K . Process 2-3 A constant pressure heat rejection to saturated liquid at P3=0.8 MPa . Process 3-4 An adiabatic throttling process to a mixture of liquid and vapor at P4=0.21704 MPa . Process 4-1 A constant pressure heat extraction from the evaporator. Evaluate the cyclic integral ∮δQ̇

An ideal vapor-compression refrigeration cycle with R-134a as the working fluid operates between the pressure limits of 120 kPa and 700 kPa. The mass fraction of the refrigerant that is in the liquid phase at the inlet of the evaporator is(a) 0.69(b) 0.63(c) 0.58(d) 0.43(e) 0.35

SOLVED:A vapor-compression refrigeration cycle uses R-134a as a… | Numerade

SOLVED:A vapor-compression refrigeration cycle uses R-134 a as a refrigerant. The mass flow rate of the R-134 a is 0.15 kg / s. The R-134 a exits the evaporator as a saturated vapor at 140 kPa absolute and enters the throttling valve as a saturated liquid at 700 kPa absolute. Determine the rate at which heat is removed from the cold space through the evaporator and the coefficient of performance of the cycle as a refrigerator if (a) the compressor is isentropic, and (b) the isentropic efficienc

Figure P10.34 gives data for an ideal vapor-compression heat pump cycle operating at steady state with Refrigerant 134 a as the working fluid. The heat pump provides heating at a rate of 15 kW to maintain the interior of a building at 20^∘ C when the outside temperature is 5^∘ C. Sketch the T-s diagram for the cycle and determine the (a) temperatures at the principal states of the cycle, each in ^∘ C. (b) the power input to the compressor, in k W. (c) the coefficient of performance. (d) the co

SOLVED:A refrigeration unit operates on the ideal vapor compression refrigeration cycle and uses refrigerant-22 as the working fluid. The operating conditions for this unit are evaporator saturation temperature of -5^∘ C and the condenser saturation temperature of 45^∘ C. Selected data for refrigerant- 22 are provided in the table below. T,^∘C Psat , kPa hf, kJ / kg hg, kJ / kg sg, kJ / kg·K -5 421.2 38.76 248.1 0.9344 45 1728 101 261.9 0.86

The Vapor Compression Refrigeration Cycle: A complete tips

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33.1K viewsJan 24, 2018

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Consider a household refrigerator that uses HFC-134a as the refrigerant, operating between the pressures of 1.0 bar and 10 bars. (a) The compression stage of the cycle begins with saturated vapor at 1 bar and ends at 10 bars. Assuming that the entropy is constant during compression, find the approximate temperature of the vapor after it is compressed. (You'll have to do an interpolation between the values given in Table 4.4 .) (b) Determine the enthalpy at each of the points 1,2,3, and 4, and ca

TS and PV diagram about vapor compression cycle

151 viewsMar 10, 2022

YouTubeDiscuss for Learning

An ideal vapor-compression refrigeration cycle with R-134a as the working fluid operates between the pressure limits of 120 kPa and 700 kPa. The mass fraction of the refrigerant that is in the liquid phase at the inlet of the evaporator is (a) 0.69 (b) 0.63 (c) 0.58 (d) 0.43 (e) 0.35 | Numerade

Numerical on Vapor Compression Refrigeration Cycle

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Ph and Ts diagram of vapour compression refrigeration cycle explaination (Part 2)

1 viewsFeb 12, 2022

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