Patent ID: 9278303
Filing Date: 2016-03-08
CPC Classification: B01D,F24F,H05K

Claim Text:
1. A method for treating an outside airflow with a direct evaporative economizer, the method comprising: circulating an outside airflow from an ambient environment into a first direct evaporative economizer module of an air handling system; circulating a first portion of a cooling fluid into the first direct evaporative economizer module at a first flow rate, the first flow rate of the cooling fluid selected so that a temperature condition of a supply airflow circulated from the air handling system to a data center meets a predetermined range of setpoint temperatures; evaporating the first portion of the cooling fluid circulated at the first flow rate into the outside airflow to cool the outside airflow; circulating the outside airflow to a second direct evaporative economizer module of the air handling system; determining that a measured air contaminant level of the outside airflow is greater than a setpoint contaminant level of the outside airflow; based on the determination, circulating a second portion of the cooling fluid into the second direct evaporative economizer module at a second flow rate to precipitate a plurality of contaminants from the outside airflow into the second portion of the cooling fluid, the second flow rate of the cooling fluid selected to precipitate the plurality of contaminants from the outside airflow into the second portion of the cooling fluid and adjust the temperature condition of the supply airflow outside of the predetermined range of setpoint temperatures; maintaining the second portion of the cooling fluid at the second flow rate based on the measured air contaminant level of the outside airflow being greater than the setpoint contaminant level, with the temperature condition of the supply airflow outside of the predetermined range of setpoint temperatures; and adjusting, during circulation of the second portion of the cooling fluid into the second direct evaporative economizer module at a substantially constant flow rate, at least one of: (i) concentration of a chemical in the second portion of the cooling fluid, or (ii) a chemical composition of the second portion of the cooling fluid based, at least in part, on the measured air contaminant level of the outside airflow greater than a setpoint contaminant level of the outside airflow, wherein the first portion of the cooling fluid is circulated to cool the outside airflow substantially simultaneous with circulation of the second portion of the cooling fluid to precipitate the plurality of contaminants from the outside airflow into the second portion of the cooling fluid.