Answered: A two -stage staged refrigeration cycle…

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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Question

A two -stage staged refrigeration cycle works at a lowest pressure of 0.8 bar and a highest of 8 bar. Each stage works as an ideal vapor compression system with R-134a as the working fluid. The release of heat from the lower cycle to the upper cycle takes place in an adiabatic heat exchanger of opposite flow where both flows in at a pressure of 3 bar. If the refrigrant mass flow rate in the upper cycle is 0.075 kg/s, calculate: a). Refrigerant mass flow rate at the bottom cycle b). Heat absorption power of the cooled room, in kW c). Supply power to compressor d). COP refrigerator Note: siklus is cycle and below the environment the purple one is QH,(the image was blur) so i explain on the note,thx

Environment
Condenser
Expansion
Valve
Cycle A
Compressor
Intermediate Heat
Exchanger
Evaporator
Condenser
Cycle B
Expansion
Valve
Compressor
Evaporator
Cooled TL
Room
2)

Lingkungan
TH
QH
Kondensor
T
2'
Katup
Ekspansi Siklus A
Kompresor
6.
Penukar Kalor
Antara
Evaporator
Kondensor
Siklus A
Siklus B
5
Katup
Ekspansi
Kompresor
Siklus B
4
Evaporator
S
Cooled TL
Room

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