Ultra-reliable cooling for unmanned and difficult locations

To ensure the reliability of unmanned electronics equipment in hot, harsh, hazardous and remote locations, INTERTEC can protect shelters using unique cooling technology. Combinations of two or three cooling systems can be fitted to provide redundancy against failure. At the heart of these solutions is INTERTEC's patented passive cooling system. It provides a fall-back solution that ensures shelters remain cool for many days in the event of a failure of active cooling equipment, or an electricity outage. This gives maintenance staff plenty of time to visit the site and make repairs.

INTERTEC's fault-tolerant passive cooling systems can employ a combination of water-based passive cooling and an electrically-powered water cooler. In normal operation, the water cooler and passive cooler operate in combination to decrease the shelter's internal operating temperature. In the example PERI SHELTER illustrated in these pages, the aluminium heatsinks of PLCs and cases are installed directly onto conductive mounting plates, in contact with the liquid-based cooling media (conductive heat transfer provides a highly efficient and compact cooling mechanism compared with convection).

The passive cooling system works by exploiting the temperature swing over the climate's daily cycle, using water as a medium to store the coolness of the night and moderate internal temperatures during the day. Natural convection moves the water around the system and its heat exchangers. As there are no moving parts, the possibility of failure is extremely small.

Passive cooling is commonly used in arid environments. However, INTERTEC's addition of powered water cooling creates a more efficient 'hybrid' passive cooling system that is able to operate in a much wider range of climates - including equatorial regions.

A third cooling technology - an air cooler - can be fitted to provide support for extremes of climate conditions, or failure of the water cooler. The combination means that the operational hours per year of the active coolers is much lower than with traditional HVAC units, which would need to run almost all the time - reducing maintenance costs.

Heating too
Such passive systems - with water-based thermal storage - can also be designed by INTERTEC to provide back-up support for shelter heating systems. This can also provide background heating for many days in the event of a failure of active heating equipment or an electricity outage.




More information?

Read this article from Managing Aging Plants magazine for a quick introduction:

Courtesy of Managing Aging Plants: