vapor-compression A water cooler based on the refrigeration cycle uses refrigerant R- 134a as the working fluid, and the refrigerator operates in 35°C surroundings. The condenser and evaporator pressures are 1.2 MPa and 180 kPa, respectively, and the isentropic efficiency of the compressor is 80%. The air conditioner is being used to cool a 6 liter/minute (LPM) stream of liquid water from 35°C down to 1°C. Find the power input needed to drive the compressor (answer: 5.63 kW). Use Cengel's R-134a tables posted on Canvas to model the refrigerant. Expansion Valve Tour 1°C 0 35°C Surroundings QCONDENSER Condenser 1.2 MPa Evaporator 180 kPa EVAPORATOR 6 LPM of Water Compressor TIN = 35°C W COMPRESSOR

vapor-compression A water cooler based on the refrigeration cycle uses refrigerant R- 134a as the working fluid, and the refrigerator operates in 35°C surroundings. The condenser and evaporator pressures are 1.2 MPa and 180 kPa, respectively, and the isentropic efficiency of the compressor is 80%. The air conditioner is being used to cool a 6 liter/minute (LPM) stream of liquid water from 35°C down to 1°C. Find the power input needed to drive the compressor (answer: 5.63 kW). Use Cengel's R-134a tables posted on Canvas to model the refrigerant. Expansion Valve Tour 1°C 0 35°C Surroundings QCONDENSER Condenser 1.2 MPa Evaporator 180 kPa EVAPORATOR 6 LPM of Water Compressor TIN = 35°C W COMPRESSOR

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

Chapter28: Special Refrigeration Applications

Section: Chapter Questions

Problem 15RQ: Why is two-stage compression popular for extra-low-temperature refrigeration systems?

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Similar questions

Why is two-stage compression popular for extra-low-temperature refrigeration systems?
Condensers in these refrigerators are all_______cooled.
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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 refrigeration cycle operates with R134a as the working fluid. The temperature of refrigerant in the condenser and evaporator are 40ºC and -20ºC respectively. The mass flow rate of refrigerant is 0.1 kg/s. Determine the cooling capacity and COP of the plant.
please answers fasterrr An ice-making machine in Restoran Syed operates on the vapor-compression refrigeration cycle. Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.13MPa and a °C at a rate of 0.13kg/s, and it leaves at 0.7 MPa and b °C. The refrigerantis cooled in the condenser to c°C and dMPa, and it is throttled to 0.14MPa. 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;i.the rate of heat removal from the refrigerated space,ii.the power input to the compressor, iii.the isentropic efficiency of the compressor, and iv.the COP of the refrigerator.v.if the compressor has no irreversibility, how about the COP?vi.Justify the difference between ideal and actual cycles. a= -8 b= 49 c= 25 d= 670
Two evaporator compression refrigeration system as shown in the pricutre below uses refrigerant134a as a working fluid. Evaporator 1 operates at 0 ºC, evaporator 2 operates at -26.4ºC, and thecondenser operates at 800 kPa. The refrigerant is circulated through the compressor at a rate of 0.5kg/s and the low-temperature evaporator serves a cooling load of 10 kW. The refrigerant is saturated liquid at the exit of the condenser and saturated vapor at the exit of each evaporator, and the compressor is isentropic efficiency is 95%. Determine a) the cooling rate of the high-temperature evaporator,b) the power required by the compressor, c) the COP of the cycle.
A Carnot vapor refrigeration cycle uses R-134a as the working fluid. The 2 poin refrigerant 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 coefficient of performance of the cycle.
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 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.
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