A long time ago, while I was a member of Uncle Sams Canoe Club, I worked on a radar system that used D.I. Water. The tubes in the liquid cooler were copper and the heat exchanger was CRES. The water was circulated throughout the transmitter group and through a Klystron where it was heated and back to the cooler. Water temp during normal operation was just over 160 degrees F., as I recall. Every three months we had to run a descaler solution through the system. During periods of high operation (transmitter up and running while at sea), we got more green sludge out of the pipes than we got out during periods of in-port operation (transmitter shut off and water temp around 60 degrees F.).
Therefore, at least in my experience, Higher temperature operation does impact the use of copper pipes. Other items of note. The liquid cooler also had a micron filter to trap impurities and a conductivity meter to test the conductivity of the water. A glycol solution was also added. Hello group, I have a product that uses cooling water and at one point within the system the water is energized to a high voltage level. There are several mechanisms used to insure that the water is safe before exiting the system. I would like to be able to use De-Ionized or Triple Distilled water for insulation as this would simplify the design. In this design there would be full time monitoring of the quality of the water. One problem is that DI water causes corrosion of copper pipes unless the inner surfaces of the pipes are plated with some other material, or so I have heard . . . Recently there have been some fairly convincing arguments that this is not a problem, for water at lower temperatures (<100 deg C). These arguments are based on an ASTM Publication now out of print, "Symposium on High-Purity Water Corrosion" presented at the annual meeting of the ASTM in 1955. I believe this presentation was mostly concerned with cooling water in nuclear reactors and very high water temperatures. As a result of this, I am now confused as to who is right. Is anyone able to provide some insight into this? -doug ================================= Douglas E. Powell Regulatory Compliance Engineer Advanced Energy Industries, Inc. 1625 Sharp Point Dr. Ft. Collins, Co 80525 mailto:doug.pow...@aei.com http:\\www.advanced-energy.com\ ================================= ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson: pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson: pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
