Homework Help is Here – Start Your Trial Now!
Engineering
Chemical Engineering
To achieve cooling to a lower temperature on an industrial scale, a cascade refrigeration system like the one shown below employs two vapor-compression refrigeration cycles. The low- temperature cycle (B) uses ammonia to remove heat from a cold space at a rate of 0.5 kg/s. Saturated vapor enters the compressor at -40 °C, and exits the condenser as a saturated liquid at 0.5 MPa. Condenser Compressar Valve Heat Exchanger Valve Compressar Evaperator Heat is released from the low-temperature cycle to the high-temperature cycle using an interconnected heat exchanger. The high-temperature cycle (A) uses refrigerant 134a, with saturated vapor entering its compressor at 0.24 MPa and exiting the condenser as a saturated liquid at 1 MPa. The isentropic efficiency of each compressoris 0.78. Determine the mass flow rate of the refrigerant 134a, and the overall coefficient of performance of the cycle.

To achieve cooling to a lower temperature on an industrial scale, a cascade refrigeration system like the one shown below employs two vapor-compression refrigeration cycles. The low- temperature cycle (B) uses ammonia to remove heat from a cold space at a rate of 0.5 kg/s. Saturated vapor enters the compressor at -40 °C, and exits the condenser as a saturated liquid at 0.5 MPa. Condenser Compressar Valve Heat Exchanger Valve Compressar Evaperator Heat is released from the low-temperature cycle to the high-temperature cycle using an interconnected heat exchanger. The high-temperature cycle (A) uses refrigerant 134a, with saturated vapor entering its compressor at 0.24 MPa and exiting the condenser as a saturated liquid at 1 MPa. The isentropic efficiency of each compressoris 0.78. Determine the mass flow rate of the refrigerant 134a, and the overall coefficient of performance of the cycle.

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
See similar textbooks
icon
Related questions
Question

Draw a t-s diagram.

To achieve cooling to a lower temperature on an industrial scale, a cascade refrigeration system like the one shown below employs two vapor-compression refrigeration cycles. The low- temperature cycle (B) uses ammonia to remove heat from a cold space at a rate of 0.5 kg/s. Saturated vapor enters the compressor at -40 °C, and exits the condenser as a saturated liquid at 0.5 MPa. Condenser Compressor Valve Heat Exchanger Valve Compressor Evaporator Heat is released from the low-temperature cycle to the high-temperature cycle using an interconnected heat exchanger. The high-temperature cycle (A) uses refrigerant 134a, with saturated vapor entering its compressor at 0.24 MPa and exiting the condenser as a saturated liquid at 1 MPa. The isentropic efficiency of each compressor is 0.78. Determine the mass flow rate of the refrigerant 134a, and the overall coefficient of performance of the cycle.
Transcribed Image Text:To achieve cooling to a lower temperature on an industrial scale, a cascade refrigeration system like the one shown below employs two vapor-compression refrigeration cycles. The low- temperature cycle (B) uses ammonia to remove heat from a cold space at a rate of 0.5 kg/s. Saturated vapor enters the compressor at -40 °C, and exits the condenser as a saturated liquid at 0.5 MPa. Condenser Compressor Valve Heat Exchanger Valve Compressor Evaporator Heat is released from the low-temperature cycle to the high-temperature cycle using an interconnected heat exchanger. The high-temperature cycle (A) uses refrigerant 134a, with saturated vapor entering its compressor at 0.24 MPa and exiting the condenser as a saturated liquid at 1 MPa. The isentropic efficiency of each compressor is 0.78. Determine the mass flow rate of the refrigerant 134a, and the overall coefficient of performance of the cycle.
Expert Solution
steps

Step by step

Solved in 4 steps with 4 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Recommended textbooks for you
Introduction to Chemical Engineering Thermodynami…
Introduction to Chemical Engineering Thermodynami…
Chemical Engineering
ISBN:
9781259696527
Author:
J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:
McGraw-Hill Education
Elementary Principles of Chemical Processes, Bind…
Elementary Principles of Chemical Processes, Bind…
Chemical Engineering
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY
Elements of Chemical Reaction Engineering (5th Ed…
Elements of Chemical Reaction Engineering (5th Ed…
Chemical Engineering
ISBN:
9780133887518
Author:
H. Scott Fogler
Publisher:
Prentice Hall
Process Dynamics and Control, 4e
Process Dynamics and Control, 4e
Chemical Engineering
ISBN:
9781119285915
Author:
Seborg
Publisher:
WILEY
Industrial Plastics: Theory and Applications
Industrial Plastics: Theory and Applications
Chemical Engineering
ISBN:
9781285061238
Author:
Lokensgard, Erik
Publisher:
Delmar Cengage Learning
Unit Operations of Chemical Engineering
Unit Operations of Chemical Engineering
Chemical Engineering
ISBN:
9780072848236
Author:
Warren McCabe, Julian C. Smith, Peter Harriott
Publisher:
McGraw-Hill Companies, The
SEE MORE TEXTBOOKS