12th International Symposium on District Heating and Cooling

The <strong>12th</strong> <strong>International</strong> <strong>Symposium</strong> on District Heating and Cooling,September 5 th to September 7 th , 2010, Tallinn, EstoniaPhoto no.: 7 Narrow space for district heating lines underbuildings in NLThe result was the ―Flexalink (Flexalen T-Link)‖ solutiona very small, flexible and 100% watertight system, prefabricatedand pressure tested by Thermaflex NL.Photo no.: 6 Pre-insulated branchThe pressure for even more economic solutions forconnections has led to further innovations in close cooperationbetween the Dutch Energy Provider Enecoand Thermaflex.PRE-FABRICATED NETWORKSCompared to the branch solutions described before,these new solutions take full advantage of flexiblewelded systems, in order to further reduce the numberof joints on sites.A new type of pre-fabricated network has beendeveloped. High flexibility and a minimum ofconnections was the goal.The first application was the district heating networkCapelle a/d Ijssel in the surroundings of Rotterdam forrenovation in difficult circumstances under houses(high ground water level) to replace corroded heatingand sanitary distribution systems.The space under the houses is so small that neitherwelding nor mechanical connections can be carried outin a safe way. Steel welding is even forbidden underthese conditions.Photo no.: 8 Flexalen T-LinkThis solution combines the following advantages: Factory made welding and branch insulation – allwatertight and pressure tested. Connections are made under clean manufacturingcircumstances. No weather influences, no failurecosts. Customer made connections according to the realsituation. Light weight and flexible for easy sliding into thetrench or under the house Fast Installing time (first project experience 10houses/day) Reducing connection costs in new buildingprojects. Less system parts on the building area.This development covered all the wishes andrequirements of the Dutch Energy Provider ENECO.They have already ordered this system for 800 houseconnections in 2010.263