Control system for absorption chillers

Details Control system for absorption chillers Control system for absorption chillers

1995-05-10

1996-09-24

Wayner, William E.

Refrigeration

Automatic control

Of closed system sorbent type

137389, 236 78D, 417 36, F25B 1500, G05D 1500

Patent

active

055579396

ABSTRACT:
A control system for absorption chillers which comprises a device for measuring operating state data concerning components of the main assembly of the chiller and including the liquid level of a high temperature generator and the degree of opening of a gas valve, and a fuzzy control circuit for calculating the deviation of the liquid level from a target value based on the measured operating state data, predicting a variation in the liquid level from the deviation and another item of the operating state data and calculating a control input as to the inverter frequency of an absorbent pump based on the result of prediction, whereby even when a great disturbance occurs, the liquid level of the generator can be controlled with high responsiveness to minimize the variation of the liquid level.

REFERENCES:
patent: 4061442 (1977-12-01), Clark et al.
patent: 4444545 (1984-04-01), Sanders et al.
patent: 5224352 (1993-06-01), Arima et al.

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