In an ideal vapour-compression refrigeration cycle, refrigerant R-12 enters the compressor as a saturated vapour at −18 degree C and leaves the condenser as a saturated liquid at 25 degree C. The mass flow rate of the refrigerant is 0.5 kg/s, and the pressure drop in the evaporator and the condenser are negligible. Calculate: a) the refrigeration effect (rate of refrigeration or heat transfer rate in the evaporator) b)power consumed by the compressor c)the coefficient of performance of the refrigerator) d)qualityof the refrigerant after the expansion valve e)heat transfer rate in the condenser

In an ideal vapour-compression refrigeration cycle, refrigerant R-12 enters the compressor as a saturated vapour at −18 degree C and leaves the condenser as a saturated liquid at 25 degree C. The mass flow rate of the refrigerant is 0.5 kg/s, and the pressure drop in the evaporator and the condenser are negligible. Calculate: a) the refrigeration effect (rate of refrigeration or heat transfer rate in the evaporator) b)power consumed by the compressor c)the coefficient of performance of the refrigerator) d)qualityof the refrigerant after the expansion valve e)heat transfer rate in the condenser

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...

See similar textbooks

Related questions

Q: An ideal vapor-compression refrigeration cycle that uses refrigerant-134a as its working fluid…

Q: A Freon 12 vapour compression system operating at a condenser temperature of 45Co and an evaporator…

Q: Consider a two-stage compression refrigeration system operating between the pressure limits of 0.8…

Q: Consider a two-stage cascade refrigeration system operating between -80 o C and 80 o C. Each stage…

A: Refrigerant is R13 Single stage vapor compression cycle Maximum temperature = 80 oC Minimum…

Q: A refrigerator uses refrigerant-134a as the working fluid and operates on an ideal vapor-compression…

Q: A two-stage cascade refrigeration system operates between the condenser pressure of 440 psia and…

Q: i) A Freon 12 vapour compression system operating at a condenser temperature of 45C° and an…

A: Given dataTC=45°CTE=0°CRC=20 tonsTo find1) m°2) QR3) OP of carnot & actual

Q: Refrigerant R134a is a working fluid in an ideal vapor-compression refrigeration cycle that…

A: Given, R - 134a is a working Fluid in an ideal vapor compression refrigeration cycle. From R-134a…

Q: determine the COP of the simple vapor compression refrigeration cycle R-134a. the evaporation…

A: Given Tmin = 253 K Tmax = 303 K

Q: vapor compression refrigeration system operates on the cycle shown below (from Smith, Van Ness, and…

Q: In a vapour compression refrigeration cycle, the refrigerant enters the compressor in saturated…

Q: 7) Analyse the refrigeration system with the following conditions: • Compressor isentropic…

A: Write the given information. Draw the T-s diagram of the cycle.

Q: Consider a two-stage compression refrigeration system operating between the pressure limits of 0.8…

Q: A two-stage compression refrigeration system operates with refrigerant-134a between the pressure…

A: Show the T-s diagram for compression refrigeration cycle as in Figure (1).

Q: Consider a steady-flow Carnot refrigeration cycle that uses refrigerant-134a as the working fluid.…

A: Draw the T-s diagram of the cycle.

Q: In an ideal vapor-compression refrigeration cycle, the refrigerant enters the compressor as a…

A: Given, m˙=0.05 kg/sP1=P4=0.14 MPaP2=P3=0.8 MPa

Q: Consider a two-stage compression refrigeration system operating between the pressure limits of 0.8…

Q: Consider a two-stage cascade refrigeration system operating between the pressure limits of 1.2 MPa…

A: Condenser pressure in upper cycle, Pc=1.2 MPaEvaporator pressure in lower cycle, Pe=200…

Q: What is the theoretical minimum pressure possible in the condenser if it is being cooled by river…

Q: 5. Consider a 500 kJ/min refrigeration system that operates on an ideal vaporcompression…

A: Answer: (a) The quality of the refrigerant at the end of the throttling process is 0.3033. (b) The…

Q: A two-stage compression refrigeration system with an adiabatic liquid- vapor separation unit uses…

Q: Consider a two-stage compression refrigeration system operating between the pressure limits of 0.8…

Q: A two-stage compression refrigeration system with an adiabatic liquid- vapor separation unit uses…

Q: A two-stage cascade refrigeration system operates between the condenser pressure of 165 psia and…

Q: A two-stage compression refrigeration system with an adiabatic liquid- vapor separation unit uses…

Q: Define C.O.P. of the simple vapor compression refrigeration cycle R-717. The evaporation temperature…

Q: An ideal vapor-compression refrigeration cycle using refrigerant-134a as the working fluid is used…

Q: Why is the reversed Carnot cycle executed within the saturation dome not a realistic model for…

A: The T-s diagram of the reversed Carnot cycle is given as

Q: 1) Consider a two-stage cascade refrigeration system operating on an ideal vapor-compression…

A: Condenser pressure in upper cycle, Pc=1.2 MPa Evaporator pressure in lower cycle, Pe=200 kPa…

Q: A steady-flow Carnot refrigeration cycle uses refrigerant-134a as the working fluid. The refrigerant…

Q: A refrigeration system using refrigerant 12 is to have a refrigerating capacity of 80 kW. The cycle…

A: To determine the suction compressor pressure.

Q: An ideal ammonia (R – 717) vapor-compression refrigeration cycle has an evaporator temperature of…

Q: Q1:- Consider a two-stage cascade refrigeration system operating between the Pressure limits of 1.6…

Q: A vapour compression refrigeration plant, which uses refrigerant-134a operates at an evaporator…

A: Refrigerant, =R134a Evaporator pressure, Pe=240 kPa Condenser pressure, Pc=1.2 MPa Temperature at…

Q: . A simple saturated refrigeration cycle for R-12 system operates at an evaporating temperature of…

Q: Problem 1 (Using thermodynamic tables) A large refrigeration plant is to be maintained at -12 C. It…

Q: A two-stage compression refrigeration system operates with refrigerant-134a between the pressure…

A: Show the T-s diagram for compression refrigeration cycle as in Figure (1).

Q: 3. When subcooling the liquid refrigerant: a. the refrigerating effect per unit mass increases. b.…

A: Subcooling within a vapor-compression refrigeration cycle has the following effect: It increases…

Q: A vapor compression refrigeration cycle uses refrigerant-134a as its working fluid. The condenser…

A: Given:- m˙=1.4093 kg/sηc=80%=0.80h2s=271.9 kJ/kgT1= -20°CP2=800 kPaTo find:-Power going to…

Q: Consider a two-stage compression refrigeration system operating between the pressure limits of 0.8…

Q: Consider a two-stage cascade refrigeration system operating between the pressure limits of 1.2 MPa…

Q: Refrigerant 22 is the working fluid in a Carnot vapor refrigeration cycle for which the evaporator…

A: GivenR22 T1=-30oCT2=36oCm=10kg/min

Question

a) the refrigeration effect (rate of refrigeration or heat transfer rate in the evaporator)

b)power consumed by the compressor

c)the coefficient of performance of the refrigerator)

d)qualityof the refrigerant after the expansion valve

e)heat transfer rate in the condenser

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

Step 2

Step 3

Step 4

Step 5

Trending now

This is a popular solution!

Step by step

Solved in 5 steps with 6 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Similar questions

Condensers in these refrigerators are all_______cooled.
When a standard-efficiency air-cooled condenser is used, the condensing refrigerant will normally be higher in temperature than the entering air temperature.
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
What are the approximate temperature ranges tor low-, medium-, and high-temperature refrigeration applications?
Refrigerators currently being manufactured in the United States are using______as their refrigerant.
Welded ______sealed compressors are normally used in household refrigerators.
When the outside ambient air temperature is 90F, the temperature of the condensing refrigerant in a standard- efficiency unit should be approximately A. 120F. B. 130F. C. 140F. D. 150F.
The COP of vapor-compression refrigeration cycles improves when the refrigerant is subcooled before it enters the throttling valve. Can the refrigerant be subcooled indefinitely to maximize this effect, or is there a lower limit? Explain.
A vapor-compression refrigeration system circulates refrigerant 134a at a rate of 0.15 kg/s. The refrigerant enters the compressor at -10 degrees Celcius and 100 kPa, and exits the compressor at 800 kPa. The isentropic efficiency of the compressor is 76%. Pressure drop through the condenser and evaporator are negligible. The refrigerant exits the condenser at 30 degrees Celcius and 800 kPa. Ignoring the heat transfer between the compressor and its surroundings, determine: The rate at which heat energy is removed from the refrigerated space in kW. The coefficient of perfromance.
An ideal vapor-compression refrigeration cycle uses R-134a as the refrigerant. The refrigerant enters the evaporator at 160 kpa with a quality of 25% and leaves the compressor at 65 °C. If the compressor consumes 800W of power, determine (a) the mass flow rate of the refrigerant, (b) the condenser pressure, and (c) the COP of the refrigerator
A two stage cascade refrigeration system uses R-12 in the high pressure loop with a condenser temperature of 300C and -100C in the cascade condenser, and R-22 in the low pressure loop with a temperature in the cascade condenser of 00C and an evaporator temperature of -30 0C. The refrigeration load is 28 tons. Given : h6 = 366 kJ/kg; h2= 421 kJ/kg Determine: 1) the mass flow rate in the low pressure loop in kg/s 2) mass flow rate in the high pressure loop, in kg/s 3) total power requirement in KW 4.) COP 5.) heat rejected in the condenser, KW 6.) amount of cooling water needed for a temp rise of 140C. in kg/s 7.) amount of ice (kg)for a 10 hrs operation if the initial temp of water is 31 0C to ice at -80C. Answe in kg.
A two stage cascade refrigeration system uses R-12 in the high pressure loop with a condenser temperature of 300C and -100C in the cascade condenser, and R-22 in the low pressure loop with a temperature in the cascade condenser of 00C and an evaporator temperature of -30 0C. The refrigeration load is 24 tons. Given : h6 = 368 kJ/kg; h2= 420 kJ/kg Determine: 1) the mass flow rate in the low pressure loop in kg/s 2) mass flow rate in the high pressure loop, in kg/s 3) total power requirement in KW