Control and method for modulating the capacity of a temperature

Details Control and method for modulating the capacity of a temperature Control and method for modulating the capacity of a temperature

1985-11-21

1987-09-01

Tanner, Harry

Refrigeration

Automatic control

Refrigeration producer

62217, 622285, F25D 1702

Patent

active

046899677

ABSTRACT:
A control and method for varying the capacity of a centrifugal chiller system used to cool a liquid to a setpoint temperature. The control permits the user to select the setpoint, the control gain, and two variables that determine a first deadband and a second relatively wider deadband about the setpoint. If the absolute value of the difference (error) between the actual fluid temperature and the setpoint is increasing, the control uses the first deadband, and conversely, if the error is decreasing, it uses the second deadband to vary chiller capacity. The control also permits the user to select a limit for various operating parameters associated with protective shutdown of the system to avoid catastrophic failure, and adjusts the chiller capacity according to one of two predefined functions of the deviation of the operating parameter from its limit, dependent on whether that deviation is greater or less than a predefined deadband.

REFERENCES:
patent: 4356961 (1982-11-01), Smith
patent: 4513910 (1985-04-01), Bartels
patent: 4589060 (1986-05-01), Zinsmeyer

Affiliated with

Also associated with

Rating

Control and method for modulating the capacity of a temperature does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Control and method for modulating the capacity of a temperature , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control and method for modulating the capacity of a temperature will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1257014