Patent ID: 9317026
Filing Date: 2016-04-19
CPC Classification: F24D,F24F,G05B,G06F,G06Q

Claim Text:
1. An improved computer implemented method of managing the energy usage of a commercial building particularly through inputs to a central processing unit of said building's management system, where said method includes collecting and analysing building data, identifying building energy reduction opportunities, characterizing said building, applying optimization process to management of said building, and monitoring building energy usage and reporting results, thereby enabling on-going building energy usage optimization, where, in the step of characterizing said building, said improvement comprises: determining a natural thermal lag of said building by a) using a processor for calculating, where E β β ε is estimated variation; b) using said natural thermal lag of said building to calculate a mechanical cool down time of said building, where said mechanical cool down is a time period over which said building cools after said building's cooling pumps are started by said building management system; and c) outputting said mechanical cool down time to said building's energy management system, which system commands a plurality of chilling pumps and, in response to said mechanical cool down time, adjusts said chilling pumps speeds, enabling improved control of said building's cooling system operation in response to external weather parameters without internal building temperature data and thereby improving management of building energy usage.