In an R717 system one evaporator is to provide 180 kW of refrigeration at -30 C and another evaporator is to provide 200 kW of refrigeration at 5 C. The system uses two-stage compression with intercooling and is arranged as shown below: The condensing temperature is 40 C. Compute the power required by the a. low-temperature (-30 C) system (kW) b. high-temperature (5 C) system (kW)
In an R717 system one evaporator is to provide 180 kW of refrigeration at -30 C and another evaporator is to provide 200 kW of refrigeration at 5 C. The system uses two-stage compression with intercooling and is arranged as shown below: The condensing temperature is 40 C. Compute the power required by the a. low-temperature (-30 C) system (kW) b. high-temperature (5 C) system (kW)
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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In an R717 system one evaporator is to provide 180 kW of refrigeration at -30 C and another
evaporator is to provide 200 kW of refrigeration at 5 C. The system uses two-stage compression with
intercooling and is arranged as shown below:
The condensing temperature is 40 C. Compute the power required by the
a. low-temperature (-30 C) system (kW)
b. high-temperature (5 C) system (kW)
Transcribed Image Text:Condenser
40°C
High-stage
compressor
Evaporator
5°C
200 kW
Intercooler and
flash tank
taalg bo
Evaporator
MY OBI
Lowstage
bolns
compressor
rolgm
e W081
(4)
nl
ons boa 0E nalti
d borinp oq
te combu
e couqu (sinbes
40°C
IS57 kPa
S°C
S17 kPa
-30°C
120 kPa
Enthalpy, kJ/kg
(b)
Pressure, kPa
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