Heating, Ventilation, and Air Conditioning: Analysis and Design
6th Edition
ISBN: 9781119628798
Author: Faye C. McQuiston; Jerald D. Parker; Jeffrey D. Spitler
Publisher: Wiley Global Education US
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Chapter 1, Problem 1.17P
Air flowing at the rate of 1000 cfm and with a temperature of 80 F is mixed with 600 cfm of air at 30 F. Use Eq. 1-2 to estimate the final temperature of the mixed air. Assume
for both streams.
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Complete this table for refrigerant-134a:
Р, КРа
600
h, kJ/kg
180
T, °C
Phase Description
-10
0.6
-14
500
1200
300.63
44
1.0
V.
W.
Th
To
%3D
Room temperature T = 293 K
V
V. Vp
The gas volume changes from Vp to Va at constant temperature T. The cartoon on the right shows a piston of gas undergoing this
compression while submerged in a container of room temperature water, which acts as a reservoir.
The initial state of this process is a piston containing 2 moles of a monatomic gas at Tc = 293 K (room temperature water) and volume V =
a
1.0 m. The gas is compressed until V, = 0.2 m. During the compression, the heat bath of room temperature water maintains the
temperature of the gas at T 293 K.
Calculate the work done in joules by the gas during this process.
Do not include units in your answer.
Be careful to use the standard sign convention for work done by the gas.
Write your numerical answer in normal form as described above in the instructions to this worksheet.
thermodyanmics (Ideal Gas)
one pound of air with an initial temperature pf 200F is allowed to expand without flow between pressure of 90 and 15 psia. If the air is undergoing a process that follows pVn=c, where n=1.4, what is the heat transferred in Btu?
Chapter 1 Solutions
Heating, Ventilation, and Air Conditioning: Analysis and Design
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