URECON / LOGSTOR LOGSTOR TWINPIPE INSTALLATION AT UNBC.
“THERE’S A NEW TREND WHERE, INSTEAD OF TWO SINGLE PIPES, WE BUNDLE THE SUPPLY AND RETURN TOGETHER INTO WHAT WE CALL TWINPIPE”
scarce, but with time more projects began to be built, particularly in Canada. “The first European-style district heating projects in North America were Cornwall, Ontario, Oujé-Bougoumou, Quebec, and Charlottetown, PEI, as well as District Energy St. Paul in Minnesota,” says Mr. Vreugde. “They all continue to operate to the present day. Since this time, EN253 piping, referring to the European norm for these pipe systems, has largely become the standard for new district energy systems in North America.” Today there are well over 50 individual EN253 pipe systems on the continent, all developed over the last 25 years. Hot water systems have several advantages over steam systems. “Hot water is a simpler system to design, install, and maintain, plus there’s far less heat loss over longer distances,” says Mr. Vreugde. “Compared to traditional steam piping, EN 6 | SUSTAINABLE BUSINESS MAGAZINE
hot water district heating requires no vaults or manholes. No anchors, or very few anchors. No traps. No requirement to lay pipe at angles to feed steam traps. No aggressive condensate return, which is often prone to failure over time. There’s less fuel required to produce hot water relative to steam, which has a direct effect on emissions. There’s a lower overall installation cost, because there are far fewer welds, and then there’s less maintenance required on the system. It’s rather an uncomplicated pipe system, as far as its construction. It’s straight steel, foam and jacket, as opposed to a complicated class-A style arrangement commonly used for high pressure steam supply.” Then there’s the distinction between European-style and North American-style hot water systems. “With Logstor’s hot water district heating pipe, there’s a predictable behaviour underground largely due to
quality during production and attention to every detail required by the EN standards,” says Mr. Vreugde. “In North America, there are separate standards for all the individual components, but there are no recognized requirements for the compliance of the entire system, and that’s where it differs from EN253. The experience with hot water district energy systems is simply far greater in places like Scandinavia. Logstor products also come with a five-year warranty, whereas traditional North American warranties are only one year, offering some additional peace of mind for decision makers.” MINIMIZING HEAT LOSS EU-standard pre-insulated pipes are particularly well-suited for use in district energy systems and steam-to-hot water conversion projects. “If you consider the background in Europe, it’s all about the heat losses,” says