At the recent Cooling Technology Institute (CTI) Annual Conference, EVAPCO's Jean-Pierre Libert presented the CTI Technical Paper titled Cooling Equipment Sound Measurements, which was very well received. The paper was recognized as a valuable contribution toward the objective of improving ATC-128 and the on-going development of the sound certification program. In addition to Libert, contributors include: Jennifer Hamilton, Scott Nevins, Will Nuckolls and Andrew Carl.
This study dives into CTI's ATC-128, Europe's ISO-3744 and China's GB/T 7190 - the test codes that describe methods to measure sound pressure levels from water-cooling towers to compute sound power levels. In accordance with these codes, EVAPCO engineers collected sound pressure measurements on a variety of factory-assembled cooling towers of different types and shapes and computed the sound power levels. The data collected and the results of calculations from the different techniques are compared. Recommendations to update ATC-128 are proposed to improve the correlation of results between the codes.