PROCEDE DE PILOTAGE DU DEBIT DE VENTILATION D'UN LOCAL ET DISPOSITIF

摘要

During an initial time period (t1) a low fixed flow of ventilating air (q1) is maintained and the percentage of carbon dioxide (M) rises. In a second time period (t2) a high fixed flow of ventilating air (q2) lowers the carbon dioxide level rapidly. The average carbon dioxide level (N) is kept to a constant target by either raising or lowering the second time period as a percentage of the repeated cycles An Independent claim is also included for equipment to capture a measure of pollution level such as number of persons and to use two speed fan and two position valve to produce successive high and low ventilating air flow periods