mechanism and an electronic on-off controller. For example, the oven uses

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seborg : 공정제어 2판 대학교재솔루션 (Process Dynamics , Modeling and Control 2nd Edition , Ogunnaike and Ray)

[솔루션] 공정제어 2판 솔루션(Process Dynamics, Modeling and Control 2nd Edition, Ogunnaike and Ray) 입니다. 1장부터 24장 까지 구성되어 있습니다. 이점 참조해주시고 저자 꼭 확인 하시고 결정해주시기 바랍니다...^^ 화학공학을 공부하는 저로써는.. 공부 할 때 정말 도움이 많이 됬던 자료 입니다. 수업을 따라가면서 이해 안가는 부분이 있으면 체크 하는 방식도 괜찮으며, 또 수업이 들은지 오래되어 다시 공부하고자 할때 도움이 되는 솔루션입니다..^^ 그리고 시험기간에는 정말 없어서는 안될 자료이기도 하구요..^^

챕터 1의 일부분을 발췌했습니다.. ^^

CHAPTER1

1.1
a) True
b) True
c) True
d) False
e) True

1.2
Controlled variable- T (house interior temperature)
Manipulated variable- Q (heat from the furnace)
Solution Manual for Process Dynamics and Control, 2nd edition,
Copyright © 2004 by Dale E. Seborg, Thomas F. Edgar and Duncan A. Mellichamp.
TC
ON/OFF SWITCH
Q T L Q

1-2
Disturbance variable- QL (heat lost to surroundings); other possible
sources of disturbances are the loss of gas pressure and the outside door
opening.
Specific disturbances include change in outside temperature, change in
outside wind velocity (external heat transfer coefficient), the opening of
doors or windows into the house, the number of people inside (each one
generating and transmitting energy into the surrounding air), and what
other electric lights and appliances of any nature are being used.

1.3
The ordinary kitchen oven (either electric or gas), the water heater, and the
furnace (Ex. 1.2) all work similarly, generally using a feedback control
mechanism and an electronic on-off controller. For example, the oven uses
a thermal element similar to a thermocouple to sense temperature; the
sensors output is compared to the desired cooking temperature (input via
dial or electronic set-point/display unit); and the gas or electric current is
then turned on or off depending on whether the temperature is below or
above the desired value. Disturbances include the introduction or removal
of food from the oven, etc. A non-electronic household appliance that
utilizes built-in feedback control is the water tank in a toilet. Here, a float
(ball) on a lever arm closes or opens a valve as the water level rises and
falls above the desired maximum level. The float height represents the
sensor; the lever arm acting on the valve stem provides actuation; and the
on-off controller and its set point are built into the mechanical assembly.

1.4
No, a microwave oven typically uses only a timer to operate the oven for a
set (desired) period of time and a power level setting that turns the power
on at its maximum level for a fixed fraction of the so-called duty cycle,
generally several seconds.
Thus setting the Power Level at 6 (60% of full power) and the Cook Time
to 1:30 would result in the oven running for a total of one and one-half
minutes with the power proportioned at 60% (i.e., turned on 100% for 6
seconds and off for 4 seconds, if the fixed duty cycle is 10 seconds long).
This type of control is sometimes referred to as


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