Energy Flux Malaysia has just launched a new type of house refrigeratorsystem using R-134a as a working fluid. It is claimed that the refrigerator canmaintain the temperature of the refrigerated space at -35°C by rejecting heat tothe surrounding air that enters a well-insulated condenser at 17°C and leavesat 27°C. The refrigerant enters the well-insulated condenser at 1.2 MPa and60°C at a rate of X kg/s and leaves at the same pressure at 44°C. In an effortto attract consumers, silence mode feature is introduced where noise generatedfrom the compressor unit is significantly reduced. Due to this new feature, therefrigerator is believed to consume 50% more actual power input whenoperated at Y kW. As an intern hired by the manufacturer, you have beentasked to perform the followings:a.Illustrate the above cycle with appropriate labels. Based on theinformation in TABLE Q1, calculate the mass flowrate of the surroundingair entering the heat exchanger in kg/s and determine the amount of heattransfer from refrigerated space in kW.TABLE Q1R-134aCompressorflowrate, Xpower(kg/s)input, Y(kW)640b.Discuss TWO (2) methods on how to increase the COP of the abovecycle.

Answered: Image /qna-images/answer/b0b0ac30-5ca4-4f1b-a19a-4d14a19c8a96.jpg

Energy Flux Malaysia has just launched a new type of house refrigerator system using R-134a as a working fluid. It is claimed that the refrigerator can maintain the temperature of the refrigerated space at -35°C by rejecting heat to the surrounding air that enters a well-insulated condenser at 17°C and leaves at 27°C. The refrigerant enters the well-insulated condenser at 1.2 MPa and 60°C at a rate of X kg/s and leaves at the same pressure at 44°C. In an effort to attract consumers, silence mode feature is introduced where noise generated

Energy Flux Malaysia has just launched a new type of house refrigerator system using R-134a as a working fluid. It is claimed that the refrigerator can maintain the temperature of the refrigerated space at -35°C by rejecting heat to the surrounding air that enters a well-insulated condenser at 17°C and leaves at 27°C. The refrigerant enters the well-insulated condenser at 1.2 MPa and 60°C at a rate of X kg/s and leaves at the same pressure at 44°C. In an effort to attract consumers, silence mode feature is introduced where noise generated

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Related questions

Q: A geothermal heat pump running a simple heat pump cycle uses R-134a as the refrigerant and sources…

Q: A refrigeration system is to be designed to maintain the temperature in the range of -15°C to -5°C,…

Q: Calculate the COP of an R-134a driven fully reversible refrigerator for an evaporator temperature of…

A: Coefficient of performance is ratio of desired effect to the work input. Cop = ( desired effect…

Q: A vapor-compression refrigerator operates as in the right figure using CO₂ as refrigerant. The…

A: A vapor-compression refrigerator operates as in the right figure using CO₂ as refrigerant.The…

Q: A commercial refrigerator with refrigerant-134a as the working fluid is used to keep the…

A: Coefficient of performance of refrigerator is defined as the ratio of heat removed from the sink to…

Q: A refrigerator is to operate to maintain a refrigerator temperature of 4°C in a 20ºC kitchen. You…

A: Given data: Tref=4 °CTroom=20 °CΔTheat=5 °C It is required to determine the refrigerant…

Q: C. Determine the COP of this refrigerator for the working fluid R-134a.

A: To find COP of the refrigerator.

Q: A real heat engine operating between two heat reservoirs, and produces 10 kW of power. The…

A: Given: The work produce by the heat engine is, W=10 kW. The efficiency of the engine is,η=42% The…

Q: An air conditioner with refrigerant-134a as the refrigerant is used to keep a large space at 20°C by…

A: Hello. Since your question has multiple sub-parts, we will solve first three sub-parts for you. If…

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

Q: NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to…

A: Given:The refrigerant is The space temperature is The water inlet temperature is The water mass flow…

Q: real heat pump has .02 kg/s of refrigerant R-134a flowing through it and it consumes 3kW of power.…

Q: NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to…

Q: A typical household refrigerator operates in a kitchen at 25oC and keeps the cold compartment at…

A: The COP for a heat pump is given by the ratio of the desired effect to the work input. The desired…

Q: A reversed Carnot cycle refrigerator maintains a temperature of -5 °c. The ambient air temperature…

Q: A refrigeration system is to be designed to maintain the temperature in the range of -15°C to -5°C,…

Q: Question 3 A vapour compression refrigerator using R134a works between temperature limits of -5 °C…

A: Step 1: Step 2: Step 3: Step 4:

Q: The large insulated flash chamber of a vacuum refrigeration plant is kept at low temperature by a…

A: To find: The quantity in cubic meter per minute of chilled water system can provide. Given: The…

Q: An ammonia refrigeration plant operating between pressures of 1167kPa and 268kPa is to produce…

Q: A commercial refrigerator with refrigerant-134a as the working fluid is used to keep the…

A: Given:Refrigerant=134aRefrigerated space temperature, Te=-35oCWater inlet temperature, Tw,i=18oCMass…

Q: A commercial refrigerator with refrigerant-134a as the working fluid is used to keep the…

A: Given:Refrigerant=R134aEvaporator temperature, Te=-35oCWater inlet temperature, Tw,i=18oCWater…

Q: A refrigeration system is to be designed to maintain the temperature in the range of -15°C to -5°C,…

Q: Warehouse uses a refrigeration system (see figure) to keep farm produce at 2 ̊C while the…

A: Given dataTemperature of conditioned space = T2 = T1 = 2°C = 275 KTemperature outside the warehouse…

Question

Energy Flux Malaysia has just launched a new type of house refrigerator
system using R-134a as a working fluid. It is claimed that the refrigerator can
maintain the temperature of the refrigerated space at -35°C by rejecting heat to
the surrounding air that enters a well-insulated condenser at 17°C and leaves
at 27°C. The refrigerant enters the well-insulated condenser at 1.2 MPa and
60°C at a rate of X kg/s and leaves at the same pressure at 44°C. In an effort
to attract consumers, silence mode feature is introduced where noise generated
from the compressor unit is significantly reduced. Due to this new feature, the
refrigerator is believed to consume 50% more actual power input when
operated at Y kW. As an intern hired by the manufacturer, you have been
tasked to perform the followings:
a.
Illustrate the above cycle with appropriate labels. Based on the
information in TABLE Q1, calculate the mass flowrate of the surrounding
air entering the heat exchanger in kg/s and determine the amount of heat
transfer from refrigerated space in kW.
TABLE Q1
R-134a
Compressor
flowrate, X
power
(kg/s)
input, Y
(kW)
6
40
b.
Discuss TWO (2) methods on how to increase the COP of the above
cycle.

Expert Solution

This question has been solved!

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

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step 3

VIEW

Step by step

Solved in 3 steps with 4 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

A vapor compression refrigeration cycle operates at steady flow conditions with 0.25 kg/s or R-134a. The table below shows some of the operating parameters and properties for the refrigerant. The compressor is refrigerated, and the condenser is also cooled with water. The compressor receives shaft power equivalent to 7.5 hp. Neglecting changes in kinetic and potential energy changes and any heat loss between devices, please answer the following. a. Complete the table below and sketch the cycle processes on a T-s diagram. When completing the table please use the same number of decimal places as in the tables. 123456 b. Determine the cooling capacity of the refrigeration unit, in Tons (1 refrigeration Ton = 211 kJ/min). c. Compute the COP. d. Determine the volume flow rate of refrigerant entering the condenser in L/min. e. Determine the mass flow rate of cooling water passing through the condenser. f. Determine the heat transfer rate from the compressor. g. Compute the rate of entropy…
There is a refrigerator that uses HFC-134a as a refrigerant and operates between 1.4 atm and 12 atm. Calculate the coefficient of performance of this refrigerator and the proportion of vapor at the lowest temperature through the throttle, respectively.
An inventor has developed a refrigeration unit that maintains the cold space at 14°F while operating in a room at 77°F. A COP of 8.5 is claimed. As an engineer tasked to evaluate the invention, what is your recommendation?
The answer is 10.17kJ/s ,Show the work fast. Copied solution would not be useful
A reversed Carnot cycle refrigerator maintains a temperature of -5°C. The ambient air temperature is 35°C. The heat gained by the refrigerator at a continuous rate is 2.5 kJ/s What is the power (in watt) required to pump this heat out continuously?
A cooling system with a capacity of 10 tons of refrigeration operates at 210 KPA in the evaporator while in the condenser it is 850 KPA if the R-134a refrigerant is in a saturated state calculate the theoretical power required to operate the compressor.
An inventor claims to have developed a heat pump that runs between a sink at 273 K and a source at 298 K, with a COP of 11. Is this claim valid? No Yes
NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. 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 0.28 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 420 W from the surroundings. The heat exchanger loses no heat to the environment. 26°C 42°C Condenser Expansion valve Evaporator OL Water 18°C 1.2 MPa 65°C Oin W in Compressor 60 kPa -34°C Determine the COP of the refrigerator. (You must provide an answer before moving on to the next part.) The COP of the refrigerator is 1.824 >
The following information is provided for a refrigerator operating on the a vapor-compression refrigeration cycle with R-134a: High pressure: 800 kPa Low pressure: 160 kPa Compressor exit temperature: 50 °C The work required to run the refrigerator per kg of refrigerant is?
NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. 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 0.28 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 420 W from the surroundings. The heat exchanger loses no heat to the environment. 26°C 42°C Expansion valve 4 Condenser ↓ Evaporator Water 18°C QL 1.2 MPa 65°C Qin W in Compressor 60 kPa -34°C Determine the quality of the refrigerant at the evaporator inlet. (Take the required values from saturated refrigerant-134a tables.) (You must provide an answer before moving on to the next part.) The quality of the refrigerant at the evaporator inlet is
A vapor compression refrigerator using R134a as the refrigerant operates under the following conditions: The refrigerant condenses at 50°C and is then sub-cooled by 10°C to 30°C before expansion. After an isenthalpic expansion, the refrigerant evaporates at -20°C and then superheated by 10°C to 0°C before compression. The refrigerant is compressed to 70°C with entropy of 1.0 kJ/kg.K at the end of the compression. a)With reference to the above operating conditions, draw the cycle on the R134a p-h diagram. b)Calculate the specific refrigerating effect at the evaporating temperature of -20°C. c)Calculate the work input for the compression process. d)Prove the vapor compression is not an isentropic process. e) Calculate the COP of the cycle. f)To produce 5kW cooling, what is the refrigerant flow rate required?