Browse Prior Art Database

Facility Control and Power Management System

IP.com Disclosure Number: IPCOM000089369D
Original Publication Date: 1977-Oct-01
Included in the Prior Art Database: 2005-Mar-04
Document File: 2 page(s) / 54K

Publishing Venue

IBM

Related People

Fant, WJ: AUTHOR [+2]

Abstract

Described is a system for controlling the interior environment of a building facility that varies the control strategy to conserve power usage. More specifically, the on and off times of air-conditioning devices are adjustable between limits as a function of sensed exterior environment conditions, such as temperature.

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Facility Control and Power Management System

Described is a system for controlling the interior environment of a building facility that varies the control strategy to conserve power usage. More specifically, the on and off times of air-conditioning devices are adjustable between limits as a function of sensed exterior environment conditions, such as temperature.

In the drawing, energy consuming devices 1, which may include fans, lights, dampers, chillers, heaters, and so forth, are operated under control of computer 2, including its stored control program. The control program includes basic control strategy portion 3, demand cycle portion 4, and enthalpy control portion 5.

User-entered parameters into basic control strategy portion 3 include demand targets and off times for day type (weekend, holiday, workday) and time of day. User-entered parameters to enthalpy control portion 5 include high and low temperature and humidity. User-entered parameters to demand cycle control portion include upper and lower limits for off times per cycle period, and the proportionality constant relating the outside and user-specified base temperature or other environmental conditions.

Sensors are provided for measuring inside and outside temperature and humidity for use by the enthalpy control portion to adjust the dampers to vary the mixture of inside and outside air circulated past the heating and cooling devices.

The outside temperature is used by the demand cycle portion to cont...