Please use this identifier to cite or link to this item: http://hdl.handle.net/1946/7729
In this work integration of an organic Rankine cycle (ORC) into district heating system (DHS) is studied. Two scenarios are considered, namely, low temperature cogeneration and high temperature cogeneration, each of them having two cases. Those cases are full time and part time operation of cogeneration. A general model which was built up in Trnsys simulation environment consists of boiler, cogeneration unit, DHS as a heat load and cooling tower. It calculates heat demand due to space heating and consumption of domestic hot water (DHW) and thus determines parameters of operation that would fulfill the needs. In scenario with high temperature cogeneration an absorption cooling is added in order to evaluate impact of increased heat demand in the summer time on operation of cogeneration.
A study case of biomass district heating in Zagorje ob Savi, Slovenia was carried out. Heat demand was calculated and parameters of cogeneration determined. Into first scenario unit with 280 kW maximum electrical power was installed and in the second one with 427 kW. With several performance indicators it was concluded that low temperature cogeneration has low performance whereas high temperature performs better but also economical analysis would be required.
|MS_Eneja_Osterman_16_February_2011.pdf||3.77 MB||Open||Master Thesis||View/Open|