Abstract: An on-line water wash system for a compressor having a bellmouth casing with a region of known high velocity inlet airflow and a number of rotating blades. The water wash system may include a number of water nozzles positioned within the bellmouth casing about the region of known high velocity inlet airflow and a stream of water droplets. The stream of water droplets is targeted by the water nozzles so as to avoid the bellmouth casing and the rotating blades.

Abstract: A method to ventilate a rotary machine housed in a compartment having a ventilation air inlet and air exhaust, a variable speed ventilation fan and a temperature sensor, wherein the method includes: sensing a temperature level of the rotary machine; applying the sensed machine temperature level to a controller for the fan; drawing ventilation flow through the compartment and over the machine; determining whether the sensed machine temperature level is above a desired temperature level of the rotary machine, wherein the desired temperature level is determined by the controller, and the controller setting an operational condition of the fan to increase the ventilation flow through the compartment if the sensed machine temperature level is above the desired temperature level.