Implementation of co-generation of thermal and electrical energy in district
heating systems often results with higher overall energy efficiency of the
systems, primary energy savings and environmental benefits. Financial results
depend on number of parameters, some of which are very difficult to predict.
After introduction of feed-in tariffs for generation of electrical energy in
Serbia, better conditions for implementation of co-generation are created,
although in district heating systems barriers are still present. In this
paper, possibilities and effects of implementation of natural gas fired
cogeneration engines are examined and presented for the boiler house that is
a part of the district heating system owned and operated by the Faculty of
Mechanical Engineering in Nis. At the moment, in this boiler house only
thermal energy is produced. The boilers are natural gas fired and often
operate in low part load regimes. The plant is working only during the
heating season. For estimation of effects of implementation of co-generation,
referent values are taken from literature or are based on the results of
measurements performed on site. Results are presented in the form of primary
energy savings and greenhouse gasses emission reduction potentials. Financial
aspects are also considered and triangle of costs is shown.
Integration of solar thermal systems into existing district heating systems
