Heating Ventilating and Air Conditioning: Analysis and Design
6th Edition
ISBN: 9780471470151
Author: Faye C. McQuiston, Jeffrey D. Spitler, Jerald D. Parker
Publisher: Wiley, John & Sons, Incorporated
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Chapter 4, Problem 4.23P
The M-200,
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A liquid (SG = 0.8 and μ = 5 CP = 0.00336 lbm/ft s) from a solvent recovery plant is being pumped
from a vessel into a reactor. The flow rate to the rector is 100 GPM (0.2228 ft³/s,) and the line,
schedule 40-carbon steel (a = 0.0018 in). The pressure in the vessel is 15 psig and the reactor is
pressurized to 65 psig. The flow into the reactor is 25 ft below the level in the vessel as shown in
the drawing. The centrifugal pump is located 5 ft below the level in the vessel.
The piping consists of the following:
Suction line
10 ft of 2.5"
Pipe
Gate valves
90 degree elbows
Check valves
2" sch 40 pipe
2.5" Sch 40 pipe
Gate valve
Check Valve
90° elbows
2
2
1
ID = 2.067"
ID=2.47"
K = 8 ft
K= 100 fr
K = 30 ff
Discharge line
325 ft of 2"
2
5
none
Acs=0.0233 ft²
Acs = 0.0332 ft²
a. Determine the velocity in the 2.5" and 2" lines (ft /s).
b. Determine the losses due to friction in both the suction and discharge lines (ft lbi/lbm).
c. Estimate the amount of total dynamic head required of the pump…
For an exhaust valve, the mass flow rate through the valve is 1.26 kg/s. The flow coefficient is 0.65 and the cylinder pressure and
temperature are 625 kPa and 820 K. Assume exhaust system pressure is 103 kPa, the specific heat ratio is 1.4 and R =287J/ kg.K. The
effective area of the valve is (SI unit):
Select one:
O a. 3.45*10-2
O b. 0.85*10-2
O c. 2.2*10-3
O d. 1.85*10-3
O e. 1.42*10-3
Example -5.2-
It is required to pump cooling water from storage pond to a condenser in a
process plant situated 10 m above the level of the pond. 200 m of 74.2 mm i.d.
pipe is available and the pump has the characteristics given below. The head
loss in the condenser is equivalent to 16 velocity heads based on the flow in
the 74.2 mm pipe. If the friction factor = 0.003, estimate the rate of flow and
the power to be supplied to the pump assuming n = 0.5
Q (m³/s) 0.0028 0.0039 0.005
0.0056 0.0059
Ah (m)
23.2
21.3
18.9
15.2
11.0
Chapter 4 Solutions
Heating Ventilating and Air Conditioning: Analysis and Design
Ch. 4 - Using Fig. 4-1, draw a conclusion about the...Ch. 4 - Using Fig. 4-1, draw a conclusion about the...Ch. 4 - Select comfortable summer design conditions (dry...Ch. 4 - It is desired to use a space as a large classroom...Ch. 4 - An indoor tennis facility finds that it has...Ch. 4 - Work Problem 4-5 for an average air speed at court...Ch. 4 - In an occupied space the mean air velocity is...Ch. 4 - An occupied space is being held at 76 F (24 C) and...Ch. 4 - What do you think is the best thermostat setting...Ch. 4 - With the air conditioning running and the...
Ch. 4 - Discuss how an emergency government mandate to set...Ch. 4 - In the heating seasons the heat loss from a...Ch. 4 - Air motion can be good or bad, depending on the...Ch. 4 - To save energy in large, chilled water systems,...Ch. 4 - Overhead fans (Casablanca fans) are often reversed...Ch. 4 - A school classroom is designed for 30 people. (a)...Ch. 4 - Carbon dioxide is being generated in an occupied...Ch. 4 - Each person in a room is assumed to be producing...Ch. 4 - An air-handling system must handle 2000 cfm with a...Ch. 4 - Prob. 4.20PCh. 4 - How many filter modules will be required using the...Ch. 4 - Work Problem 4-21 assuming that the filter is a...Ch. 4 - The M-200, 0.60.60.2 filters of Table 4-3 are to...Ch. 4 - Investigate the feasibility of using 100 percent...Ch. 4 - Work Problem 4-24 but replace the 100 percent...Ch. 4 - Using M-15 filter media and the requirement of 60...Ch. 4 - A filter system is available that will filter out...Ch. 4 - A maximum of 10 smokers are anticipated in a smong...Ch. 4 - Solve Ex. 4-4 assuming that the filter is in...Ch. 4 - Solve Problem 4-28 assuming that the filter is in...Ch. 4 - Fora 3000-ft3 combination and exercise operation,...Ch. 4 - A classroom with a capacity of 225 people is...
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