12th International Symposium on District Heating and Cooling
12th International Symposium on District Heating and Cooling
12th International Symposium on District Heating and Cooling
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The <str<strong>on</strong>g>12th</str<strong>on</strong>g> <str<strong>on</strong>g>Internati<strong>on</strong>al</str<strong>on</strong>g> <str<strong>on</strong>g>Symposium</str<strong>on</strong>g> <strong>on</strong> <strong>District</strong> <strong>Heating</strong> <strong>and</strong> <strong>Cooling</strong>,September 5 th to September 7 th , 2010, Tallinn, Est<strong>on</strong>iab) The local representati<strong>on</strong> <strong>and</strong> if necessarytreatment of the results by the GIS: The result canbe visualized in the GIS (Fig. 9). The differentcolored lines in the left secti<strong>on</strong> show theascertained route planning, <strong>and</strong> in the right secti<strong>on</strong>of Fig. 9 a part of the data base with the siterelateddata is displayed: Length of pipeline in m,the diameter in mm, the mass flow in kg/s<strong>and</strong> the pressure differencein bar.Fig 9 step 6CONCLUSIONStable versi<strong>on</strong>s of FreeOpt <strong>and</strong> of STEFaN are alreadyfinished. The program‘s power was dem<strong>on</strong>strated withsimple examples. They can be downloaded from [6].FreeOpt calculates the optimal operating soluti<strong>on</strong> ofdistrict heating networks at a minimum of costs to estimatesaving potentials. With the help of parameters <strong>and</strong> figurelines it is very easy to modify the system c<strong>on</strong>figurati<strong>on</strong> tocheck how the system reacts under new c<strong>on</strong>diti<strong>on</strong>s <strong>and</strong>how the operating costs change. In all cases the tool givesvaluable informati<strong>on</strong>.Unfortunately, the user guide, the help file <strong>and</strong> themanual are <strong>on</strong>ly available in German at the moment forboth programs.REFERENCES[1] www.bmwi.de: LowEx Fernwärme – Multilevel<strong>District</strong> <strong>Heating</strong>, Fördergeber: Bundesministeriumfür Wirtschaft und Technologie, FKZ 0327400B.[2] www.gnu.org/software/glpk:GNU Linear .Pro-gramming Kit[3] www.coin-or.org: Computati<strong>on</strong>al Infrastructure forOperati<strong>on</strong>s Research.[4] www.gnu.org/licenses/gpl.html: GNU GeneralPublic License[5] S. Gnüchtel, Ein Beitrag zur Strukturoptimierungv<strong>on</strong> Fernheiznetzen, PhD thesis TU Dresden(1981)[6] http://tu-dresden.de/die_tu_dresden/fakultaeten/fakultaet_maschinenwesen/iet/ew/forschung_und_projekte/mldh/download_ml325
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