There has been a lot of buzz lately on the internet regarding work at the Oak Ridge National Laboratory to develop a dryer that uses ultrasonics instead of heat to dry things. The major thrust seems to be to replace the conventional domestic clothes dryer (which uses heat to evaporate water) with one that uses ultrasonics …
The environment in the area of an industrial cleaning system is often not a “healthy” one for personnel or equipment. Caustic and acidic cleaning chemistries rise as mist above cleaning processes along with humidity and heat. Although our first thought is to protect personnel from these hazards, the equipment can also suffer serious consequences as a …
When a liquid or a gas flows uniformly and without turbulation, the result is called “laminar flow.” The most visual example of laminar flow for most of us are those arching water displays where perfectly shaped slugs of crystal clear water flys gracefully through the air from one point to another. When I first saw this effect at …
Maximum ultrasonic performance requires the most efficient transfer of ultrasonic vibrations from the ultrasonic transducers to the liquid in the process tank. This is generally accomplished by applying ultrasonic transducers directly to the exterior surfaces of a tank containing the process liquid. Transducer attachment techniques favor attachment to metals like stainless steel. What if the chemistry to be used …
Earlier blogs have shown how difficult and deceptive it can be to relate energy consumed to work delivered. In this blog I would like to offer an example of this difficulty as it relates directly to ultrasonic transducers and cleaning. First of all, most (if not all) ultrasonic devices used for cleaning utilize a number …
Most surfaces that we encounter in industrial cleaning are relatively smooth and contiguous. We have talked earlier about the difficulties of cleaning blind holes, threads, capillary spaces and other challenging configurations. The one surface we haven’t yet explored is that of a material that is itself porous. Sintered materials including metal, ceramic, glass, plastic and …
Electricity is not something we give considerable attention to in our daily lives. At home or at work (or wherever) there are electrical outlets. We simply plug devices into the outlets and the devices light up, heat, rotate, vibrate, charge or do whatever they’re supposed to do. What’s behind the outlet, generally, is of little concern …
Three phase power is commonly used where large amounts of electrical power are required. Examples are power transmission lines and large industrial machines which require considerable power. What is three phase power anyway? Let’s start by thinking of a two wire transmission line as shown below connecting the source of alternating current power to the …
Most of us are aware that the power we get from the power line coming into our house or factory comes as alternating current. Basically, the voltage on the “hot” wire as referenced to ground varies, going negative then positive 60 times each second (60 Hz). The benefit and compelling argument for using alternating current …
As discussed in a previous blog, one problem with watts is that watts do not equal energy. Let’s carry that thought a little further again using the vehicle analogy I put forth in the initial blog of this series. In the ultrasonic world it is common to associate the effectiveness of an ultrasonic cleaning tank its …
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