There’s nothing exciting about the topic of dielectric grease—it’s about as mundane as you can get. But this silicone compound is of the utmost importance in protecting vehicles and electrical systems of all kinds, including HVAC/R ultraviolet lamp (UV-C) connections from costly corrosion and water damage.
If you are still performing mechanical cleanings of your building’s HVAC/R components, you are likely wasting money and time with this temporary attempt to increase system efficiency. Most facility maintenance crews undertake these labor-intensive cleanings more than once per year, and to what end? The coils inevitably foul up again, and you’re back to square one. Even after you’ve cleaned them, mechanical cleanings cannot reach up to 75 percent of the average 12-inch thick coil, where microorganisms continue to proliferate, reduce heat transfer efficiency and raise pressure drop.
Light in the ultraviolet-C (UV-C) germicidal spectrum provides nonstop protection for HVAC/R systems against efficiency-robbing mold and bacteria growth. Yet, only about 20 to 30 percent of building engineers enjoy this ongoing protection because they don’t replace their UV-C lamps.
Like anything else, UV-C lamps will need to be replaced, typically annually, or after roughly 9,000 hours of operation. This creates a question not only of replacement, but also of proper disposal.
When people first see the futuristic blue hue of an ultraviolet-c (UV-C) lamp, some might think ultraviolet germicidal irradiation (UVGI) is a recent invention.
Yet, knowledge of UV-C goes back well over 100 years, having gone through various phases of development.
Here’s a brief history outlining some pivotal points in the century-long history of the various applications of UV-C.