**Educational Content on Refrigeration Cycle**### OverviewThis section provides a detailed explanation of a commercial refrigeration system using refrigerant-134a. The system is designed to maintain a refrigerated space at a temperature of -35°C by expelling waste heat to cooling water.### System Description- **Refrigerant:** R-134a- **Refrigerated Space Temperature:** -35°C- **Condenser Water Inlet Temperature:** 18°C- **Condenser Water Outlet Temperature:** 26°C- **Cooling Water Mass Flow Rate:** 0.35 kg/s- **Condenser Pressure:** 1.2 MPa- **Condenser Temperature:** 50°C, subcooled by 5°C- **Compressor Power Consumption:** 3.3 kW### Diagram ExplanationThe refrigeration cycle consists of four main components, depicted in the schematic diagram:1. **Compressor:** - Increases the pressure and temperature of the refrigerant. - Power input required is 3.3 kW.2. **Condenser:** - Heat exchange occurs here where hot refrigerant gas is cooled by water. - Enters at 1.2 MPa and 50°C, with water entering at 18°C and leaving at 26°C.3. **Expansion Valve:** - Reduces the pressure and temperature of the refrigerant, preparing it for the evaporator.4. **Evaporator:** - Absorbs heat from the space to be cooled. - Refrigerant transitions from a liquid to a gas.### Task**Objective:** Determine the mass flow rate of the refrigerant within the system.**Calculations:**- Use thermodynamic tables and the provided conditions to calculate the mass flow rate in kg/s.**Question:**- Determine the mass flow rate of the refrigerant.**Answer Box:** - The mass flow rate of the refrigerant is _____ kg/s.This setup allows students to explore the application of thermodynamic principles in refrigeration and helps them calculate key parameters for efficient system operation.

Answered: Image /qna-images/answer/954927ed-ac28-43ae-bf57-a70094b0a574.jpg

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 2₁ Water 18°C 1.2 MPa 50°C Compressor Determine the mass flow rate of the refrigerant. (You must provide an answer before moving to the next part.) The mass flow rate of the refrigerant is kg/s.

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 2₁ Water 18°C 1.2 MPa 50°C Compressor Determine the mass flow rate of the refrigerant. (You must provide an answer before moving to the next part.) The mass flow rate of the refrigerant is kg/s.

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

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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 >
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 ↑ 4 Condenser Expansion valve Evaporator QL Water 18°C 1.2 MPa 65°C ↑gin Win Compressor 60 kPa -34°C Determine the theoretical maximum refrigeration load for the same power input to the compressor. The theoretical maximum refrigeration load for the same power input to the compressor is KW.
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
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