Abstract
The application of coatings with amorphous carbon films, also called Diamond-Like Carbon (DLC) in heat exchangers has already been shown to substantially reduce fouling. However, their wide application, especially with regard to shell and tube heat exchangers, has not occurred to date. Researchers at the University of Applied Sciences Upper Austria, Wels, Austria, promote industrial applications of DLC, using the PACVD reactor technology of the RUBIG Group.
In this article, experiences with welding tests with DLC-coated tubes and appliance parts for a shell and tube heat exchanger (600 mm inner diameter, 5000 mm length, 200 pipes with 25 mm outer diameter) are presented. The welding seams were of good quality. The coatings showed minor ablations near the welding area. It can be stated that apparatus of these dimension can be used with 80 to 90% effective DLC coating, which are capable of withstanding high pressure and resisting temperatures up to 450°C. With improvement in the production of DLC-coated tubes, a 99% ratio has been targeted for the future.
In this article, experiences with welding tests with DLC-coated tubes and appliance parts for a shell and tube heat exchanger (600 mm inner diameter, 5000 mm length, 200 pipes with 25 mm outer diameter) are presented. The welding seams were of good quality. The coatings showed minor ablations near the welding area. It can be stated that apparatus of these dimension can be used with 80 to 90% effective DLC coating, which are capable of withstanding high pressure and resisting temperatures up to 450°C. With improvement in the production of DLC-coated tubes, a 99% ratio has been targeted for the future.
| Original language | English (American) |
|---|---|
| Pages (from-to) | 49-53 |
| Number of pages | 4 |
| Journal | Heat Exchanger World |
| Volume | 3 |
| Issue number | 6 |
| Publication status | Published - 1 Nov 2021 |
