Pumptripps in a district heating system. Components included in simulation: 1491 pipes, 537 heatloads, 135 valves, 54 pumps, 20 boilers. Hydroram AB Gamla Rambergsvägen 30 417 01 Göteborg SWEDEN Besök : 9852ggr   Ola Rossing : +46 (0)31 - 50 88 06, ola@hydroram.se Gunnar Larsson : +46 (0)31 - 50 88 36, gula@hydroram.se Fax: +46 - (0)31 - 50 88 05