The figure to the right gives the schematic of an air conditioner cycle that steadily circulates R134a through the four components shown. The R134a flows through the evaporator and condenser at constant pressure and through the compressor adiabatically and isentropically. Kinetic and potential energy effects can be ignored. Assume mass flow rate is 0.5 kg/s. Process data is as follows.
The figure to the right gives the schematic of an air conditioner cycle that steadily circulates R134a through the four components shown. The R134a flows through the evaporator and condenser at constant pressure and through the compressor adiabatically and isentropically. Kinetic and potential energy effects can be ignored. Assume mass flow rate is 0.5 kg/s. Process data is as follows.
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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Transcribed Image Text:PROBLEM 4:
The figure to the right gives the
schematic of an air conditioner cycle that
steadily circulates R134a through the four
components shown. The R134a flows
through the evaporator and condenser at
constant pressure and through the
compressor adiabatically and
isentropically. Kinetic and potential
energy effects can be ignored. Assume
mass flow rate is 0.5 kg/s. Process data is
as follows.
4.
Evaporator
in House
Throttling
Compressor
Value
Condenser
Outside
2.
Process 4-1: constant-pressure at 340 kPa from saturated liquid to saturated vapor.
Process 3-2: constant-pressure at 1000 kPa.
Process 3-4: constant enthalpy and We = 0
Part a.) Determine if cycle is internally reversible, irreversible, or impossible. If
impossible explain which of the assumptions above is probably incorrect.
Part b.) Determine the coefficient of performance.
Part c.) Fill in the tables below (except T3 and s3). USE THE UNITS GIVEN ON THE
TABLES!
T(C)
h(kl/kg)
s(k//kg*K)
State
P (kPa)
2
3.
4.
W (kW)
Change in Energy (kW)
Process
Q (kW)
1-2
2-3
3-4
4-1
ТОTAL
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