OPTIMUM START/STOP DEPENDENT UPON BOTH SPACE TEMPERATURE AND OUTDOOR AIR TEMPERATURE

摘要

A system for determining the optimum stop time of an air conditioning system within a building so that energy can be conserved by shutting down the air conditioning system an amount of lead time prior to end of occupancy of said building wherein said amount of lead time is arranged to confine space temperature within a comfort range as said space temperature drifts during said amount of lead time, said system including a space temperature sensor for sensing space temperature within the building, an outdoor air temperature sensor for sensing outdoor air temperature external to the building, and a controller connected to the space temperature sensor, the outdoor air temperature sensor and the air conditioning system for determining temperature drift rate within the building and for turning off the air conditioning system before the end of occupancy of the building by an amount of lead time dependent upon the temperature drift and the outdoor air temperature.