REFRIGERATION+AIR COND.TECH.-W/2 ACCESS
8th Edition
ISBN: 9781337370042
Author: TOMCZYK
Publisher: CENGAGE L
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Chapter 14, Problem 17RQ
To determine
The condition when line voltage thermostat is used.
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Two large tanks, each holding 100 L of liquid, are interconnected by pipes, with the liquid flowing from tank
A into tank B at a rate of 3 L/min and from B into A at a rate of 1 L/min (see Figure Q1). The liquid inside each
tank is kept well stirred. A brine solution with a concentration of 0.2 kg/L of salt flows into tank A at a rate of
6 L/min. The diluted solution flows out of the system from tank A at 4 L/min and from tank B at 2 L/min. If,
initially, tank A contains pure water and tank B contains 20 kg of salt.
A
6 L/min
0.2 kg/L
x(t)
100 L
4 L/min
x(0) = 0 kg
3 L/min
B
y(t)
100 L
y(0) = 20 kg
2 L/min
1 L/min
Figure Q1 - Mixing problem for interconnected tanks
Determine the mass of salt in each tank at time t > 0:
Analytically (hand calculations)
Chapter 14 Solutions
REFRIGERATION+AIR COND.TECH.-W/2 ACCESS
Ch. 14 - Why is a low-voltage thermostat normally more...Ch. 14 - The three kinds of switching mechanism used in...Ch. 14 - Prob. 3RQCh. 14 - What does a cold anticipator do?Ch. 14 - Define system overshoot when dealing with...Ch. 14 - Prob. 6RQCh. 14 - Prob. 7RQCh. 14 - Describe the method a service technician should...Ch. 14 - Explain how microelectromc or electrontc...Ch. 14 - Prob. 10RQ
Ch. 14 - What component steps down the voltage to the...Ch. 14 - Low voltage is desirable for residential control...Ch. 14 - What is the maximum amperage usually encountered...Ch. 14 - Prob. 14RQCh. 14 - Prob. 15RQCh. 14 - What two types of switches are normally found in...Ch. 14 - Prob. 17RQCh. 14 - Prob. 18RQCh. 14 - Why is a line-voltage thermostat mounted on an...Ch. 14 - What is the principle of operation for most...Ch. 14 - Describe a method for speedmg up the cooling of an...Ch. 14 - Describe two methods for cooling an overheated...Ch. 14 - How can an electronic thermometer be used in a...Ch. 14 - A temperature-sensing device used in measuring...Ch. 14 - How does a thermocouple change with a temperature...Ch. 14 - True or False: Pressures below atmospheric...Ch. 14 - Name one function of the low-pressure control.Ch. 14 - Which is true of a high-pressure control? A. It...Ch. 14 - Name two types of water pressure control.Ch. 14 - Why should a safety control not be adjusted if it...Ch. 14 - Prob. 31RQCh. 14 - True or False: A change in the differential...Ch. 14 - True or False: A change in the differential of a...Ch. 14 - Prob. 34RQCh. 14 - Explain what is meant by the range of a...
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