An air conditioner with refrigerant-134a as theworking fluid is used to keep a room at 26C by rejectingthe waste heat to the outside air at 34C. The room isgaining heat through the walls and the windows at a rate of 250 kJ/min while the heat generated by the computer,TV, and lights amounts to 900 W. An unknown amountof heat is also generated by the people in the room. Thecondenser and evaporator pressures are 1200 and 500 kPa,respectively. The refrigerant is saturated liquid at the condenserexit and saturated vapor at the compressor inlet. Ifthe refrigerant enters the compressor at a rate of 100 L/minand the isentropic efficiency of the compressor is 75 percent,determine (a) the temperature of the refrigerant at thecompressor exit, (b) the rate of heat generation by the peoplein the room, (c) the COP of the air conditioner, and(d) the minimum volume flow rate of the refrigerant at thecompressor inlet for the same compressor inlet and exitconditions.

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
icon
Related questions
Question
100%

An air conditioner with refrigerant-134a as the
working fluid is used to keep a room at 26C by rejecting
the waste heat to the outside air at 34C. The room is
gaining heat through the walls and the windows at a rate of 250 kJ/min while the heat generated by the computer,
TV, and lights amounts to 900 W. An unknown amount
of heat is also generated by the people in the room. The
condenser and evaporator pressures are 1200 and 500 kPa,
respectively. The refrigerant is saturated liquid at the condenser
exit and saturated vapor at the compressor inlet. If
the refrigerant enters the compressor at a rate of 100 L/min
and the isentropic efficiency of the compressor is 75 percent,
determine (a) the temperature of the refrigerant at the
compressor exit, (b) the rate of heat generation by the people
in the room, (c) the COP of the air conditioner, and
(d) the minimum volume flow rate of the refrigerant at the
compressor inlet for the same compressor inlet and exit
conditions.

Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 4 steps with 11 images

Blurred answer
Knowledge Booster
Refrigeration and Air Conditioning
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.
Similar questions
Recommended textbooks for you
Elements Of Electromagnetics
Elements Of Electromagnetics
Mechanical Engineering
ISBN:
9780190698614
Author:
Sadiku, Matthew N. O.
Publisher:
Oxford University Press
Mechanics of Materials (10th Edition)
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:
9780134319650
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Thermodynamics: An Engineering Approach
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:
9781259822674
Author:
Yunus A. Cengel Dr., Michael A. Boles
Publisher:
McGraw-Hill Education
Control Systems Engineering
Control Systems Engineering
Mechanical Engineering
ISBN:
9781118170519
Author:
Norman S. Nise
Publisher:
WILEY
Mechanics of Materials (MindTap Course List)
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:
9781337093347
Author:
Barry J. Goodno, James M. Gere
Publisher:
Cengage Learning
Engineering Mechanics: Statics
Engineering Mechanics: Statics
Mechanical Engineering
ISBN:
9781118807330
Author:
James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher:
WILEY