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By: Robert Houser, ATI Wah Chang
“Extensive bio-fouling of titanium has been observed after only 800 hours of immersion in sea water. This is because titanium has no toxicity towards marine organism; it is an environmentally friendly alloy…”
“In applications where flow velocities need to be less than 8 ft/sec (2.4 m/sec), it is recommended that chlorine be added to the system. Chlorine has been found to be very effective and as little as 0.5 parts per million can successfully maintain a thermally clean system and prevent hard fouling organisms…”
“Titanium is a very noble metal. When coupled to other metals, titanium will be the cathode and the other metal will be the anode and corrode. This galvanic effect may create excessive hydrogen and be absorbed by the titanium, which is a concern because the material can become brittle and eventually break. If dissimilar metals have to be coupled, it is best to utilize insulation products.”
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Chillers Water Cooled
Self Contained Water Cooled Chillers
Variable speed units are indeed more efficient and will save you about twenty bucks a month in electricity, however they are a LOT more complex, have many more printed circuit boards and are considerably more expensive to buy. The “boards” may be free with some manufacturers, but the service calls are not $$$$.
VFDs will reduce/eliminate the start up surge & flickering TVs and you can control the speed of the compressor, so most of the benefits of variable speed units are reaped with a very reliable, time tested and relatively inexpensive over the counter VFD controller. If you have single phase 220 our VFD units will have three phase compressors in addition to the VFD, so the surcharge is relatively small.
Self Contained Air Cooled Chillers
Chillers Air Cooled