Proportional with variable bias batch reactor temperature contro

Details Proportional with variable bias batch reactor temperature contro Proportional with variable bias batch reactor temperature contro

1995-11-02

1997-12-16

Wayner, William E.

Heat exchange

With timer, programmer, time delay, or condition responsive...

Having heating and cooling capability

62201, 236 78D, 364137, F25D 1702, G05D 1500

Patent

active

056974361

ABSTRACT:
An improved method of controlling the temperature of a batch reactor employing a cascaded master and slave controller architecture wherein the temperature of the reactor serves as the measured variable, MV.sub.1, in the master loop and the jacket temperature serves as the measured variable, MV.sub.2, in the slave loop and the feedback for the master loop, FB.sub.1, is intentional set equal to this measured variable, MV.sub.1, or to the master controller set point, SP.sub.1, corresponding to the temperature of the reactor thus inherently creating a bias feedback and proportional variable reset (PVR). The novel PVR temperature control system is useful in alleviating product variability caused by temperature control variation during heat, cod and hold steps.

REFERENCES:
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patent: 4925089 (1990-05-01), Chaparrd et al.
patent: 5091844 (1992-02-01), Waltz
patent: 5153807 (1992-10-01), Saito et al.
patent: 5170341 (1992-12-01), Sklaroff
patent: 5200681 (1993-04-01), Hiroi
patent: 5207379 (1993-05-01), Hurmi et al.
patent: 5208744 (1993-05-01), Kanda
patent: 5291390 (1994-03-01), Sauou et al.
Instrumentation for Process Measurement and Cotrol Norman Anderson, 1974 pp. 158, 159.

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