Acceptance Test Code for Adiabatic Fluid Coolers - ATC 105 Adiabatic

Adiabatic coolers, or adiabatic fluid coolers, consist of a heat exchanger typically in the form of a coil comprised of tubes creating a closed fluid circuit(s), an air moving device, an integral adiabatic air-pre-cooling system (such as wet media or pads, hereafter referred to 
as wet media) and a structure. In adiabatic operation, heat flows from the hot process fluid in the closed circuit(s) through the tube wall of the heat exchanger to the airstream that has been pre-cooled by the adiabatic system. This airstream is circulated by the air moving
device, such as a fan. The heat exchanger may include internal enhancements and / or external fins that are in direct contact with the tube wall, to improve heat transfer rates. While the air is adiabatically pre-cooled with water running over the wet media, the entire external surface of the heat exchanger remains dry and as such the heat transfer process for adiabatic coolers is strictly sensible cooling. Evaporative, dry-only, and adiabatic cooling with spray systems (as opposed to wetted media) are not covered by this  Acceptance Test Code. Adiabatic systems attached to a dry fluid cooler after purchase and supplied by anyone other than the original equipment manufacturer, are beyond the scope of the standard.

Revised April 2023