SYSTEM AND METHOD FOR ADJUSTING FRACTIONAL ON-TIME AND CYCLE TIME TO COMPENSATE FOR WEATHER EXTREMES AND MEET VENTILATION REQUIREMENTS

摘要

A ventilation method and system is described for providing adequate ventilation to an indoor environment while avoiding certain periods of times where ventilation air conditions or other control variables tend to be less optimal or preferable for ventilation, but while still meeting established or future ventilation air standards. The described system and method utilize incremental target cycle times determined based on a regression analysis estimating expression of fractional on time as a function of effectiveness multiplied by fractional on time for a corresponding cycle periods.

主权项

1. A method for providing ventilation, the method comprising:
determining a comprehensive target cycle time, whereby the comprehensive target cycle time is determined as a function of a first incremental target cycle time; obtaining a first measure of a control variable useable to determine preferable ventilation timing; comparing the first measure to a predetermined value or range of values for the control variable; and determining whether to initiate or continue ventilation based on (a) the comparison of the first measure to the predetermined value or range of values for the control variable, (b) the value of an incremental target cycle time counter relative to the first incremental target cycle time, and (c) the value of a comprehensive target cycle time counter relative to the comprehensive target cycle time.