Adiabatic cooling system

An adiabatic cooling system comprising:

• a housing;
• a heat exchanger coupled to the housing, the heat exchanger configured to cool a working fluid;
• an evaporative panel coupled to the housing;
• a fan coupled to the housing and operable to draw an airflow through the evaporative panel and the heat exchanger to cool the working fluid within the heat exchanger;
• a fluid supply circuit configured to receive a fluid from a fluid supply, the fluid supply circuit includes a supply valve operable to control fluid flow from the fluid supply through the fluid supply circuit to deliver the fluid to the evaporative panel to wet the evaporative panel using fluid from the fluid supply;
• a collector coupled to the housing and configured to receive a recovery fluid from the evaporative panel;
• a fluid level sensor configured to detect a recovery fluid level in the collector;
• a recovery fluid circuit in fluid communication with the collector, the recovery fluid circuit including a recovery valve operable to control fluid flow through the recovery fluid circuit to deliver the recovery fluid to the evaporative panel to wet the evaporative panel using recovery fluid from the collector;
• and
• a controller in communication with the fluid level sensor and the controller operable to control operation of the fan, the supply valve, and the recovery valve,
• wherein when the recovery fluid level in the collector is less than a first predetermined amount, the controller operates in a fluid supply mode where the supply valve is open and the fluid supply circuit directs the fluid from the fluid supply to the evaporative panel to wet the evaporative panel using the fluid from the fluid supply,
• wherein when the recovery fluid level in the collector is greater than a second predetermined amount, the controller operates in a recovery mode where the recovery valve is open and the recovery fluid circuit directs the recovery fluid from the collector to the evaporative panel to wet the evaporative panel using the recovery fluid from the collector,
• wherein the controller is operable to determine a time period between a first cycle in the recovery mode and a second cycle in the recovery mode, if the time period is less than a first preset time period, then there is a first time lapse before the controller enters the fluid supply mode, and if the time period is greater than a second preset time period, then there is a second time lapse before the controller enters the fluid supply mode, and wherein the first time lapse is greater than the second time lapse.