Trane International Inc.

Joel Donald Monroe

Susanna Staubly Hanson

Anthony Wayne Bruno

William Nelson Devroy

Anthony N Lee

A system and a method for calculating in real time, actual realized savings that a cooling system obtains from addition of a thermal storage capability to the cooling system, compared to a model of the system without the added thermal storage capability.

System and method for real cost analysis of a cooling system

An HVAC system for controlling the temperature and humidity of air supplied to a comfort zone includes a heater and a cooler operating concurrently. In response to a supply air temperature sensor, a PID control loop with substantially constant gain controls the cooler to maintain the zone air at a certain comfortable temperature. The heater, also under PID control, is controlled in response to a humidistat. To prevent the heater from overloading the cooler during periods of high cooling demand, a variable gain multiplier decreases the heater's gain when the cooler's output exceeds a predetermined limit; otherwise, the heater's gain remains substantially constant. When the cooler is operating above the predetermined limit, the multiplier varies linearly between positive-one and negative-one and does so inverse-proportionally with the cooling load to smoothly change the heater's PID control from direct acting to reverse acting as the cooler approaches its maximum capacity.

Growing community of inventors

Brooklyn Center, MN, United States of America

Joel Donald Monroe