TEMPCONT - Control of Temperature in a Water Heater

The simple feedback control system below consists of a continuous-flow stirred tank, a temperature measurement device, a controller and a heater. [Pg.505]

The program makes use of the random number generator in ISIM, RAND, to cause random fluctuations in the feed temperature, To. Eliminating RAND will shorten the run time. [Pg.506]

FEEDBACK CONTROL OF A CONTINUOUS WATER HEATER UNITS DEG C,KCAL,KG,L,HR [Pg.506]

Disconnect the controller (set Kp = 0), allow the temperature to reach steady state, and measure the temperature response to changes in water flow. [Pg.507]

Measure the controlled response to a step change in F with proportional control only (set Xi very high). Notice the offset error and its sensitivity to Kp. Change to a low value. Does the offset disappear [Pg.507]

The measurement of temperature is also delayed by a sensor lag given by [Pg.473]

Random disturbances in flow rate or feed temperature can be generated using the RANDOM function in Madonna, as explained in the program HELP. [Pg.473]

Specific heat Frequency of oscillations Flow rate [Pg.473]

Differential control constant Integral control constant Time constant for heater Time constant for measurement [Pg.473]

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