Development of Dual-Air-Assistant Atomizing Nozzle to Apply Aerosol-Sealing Technology in Air Duct Systems

July 8, 2002 - 12:00pm
Bldg. 90

An Aerosol-sealing Technology was developed by LBNL to seal leaks in Air Duct Systems (ADS). The firm AEROSEAL already commercializes this technology for residential ADS. The current goal of our research at the Laboratory is to apply this technology to large commercial ADS. That means to develop a new kind of injector called “Compact Injector”. So far, the injector that is used is a nozzle from the Schlick-Dusen firm. Results in terms of sealing rate are satisfactory, but this nozzle quickly clogs up with sealant particles. There are two reasons for the clogging problem: the deposition of particles in the liquid tube and on the tip of it, and the fact of switching it on and off (when it is off some particles stay inside and dry). In order to solve this problem, we invented a new kind of injector with a dual-air -assistant system: a heated compressed air system to inject and dry the particles, and an insulating air system around the liquid tube to insulate it from the hot air and keep it around room temperature. The work which will be presented has two main objectives: first is to prove the concept and develop it to apply the new nozzle as soon as possible if it is conclusive, and the second objective is to take out a patent. For more information about this seminar, please contact: JoAnne Lambert 510.486.4835, or send e-mail to JMLambert[at]

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