Thermal Science 2016 Volume 20, Issue 4, Pages: 1105-1120
https://doi.org/10.2298/TSCI160212114T
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Influence of legislative conditioned changes in waste management on economic viability of MSW-fuelled district heating system: Case study
Tomić Tihomir (University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, Croatia)
Ćosić Boris (Adria Section of the Combustion Institute, Zagreb, Croatia)
Schneider Daniel Rolph (University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, Croatia)
District heating systems represents one of the ways by which the European
Union is trying to reach set goals in energy efficiency and security field.
These systems allow the use of different energy sources including local
energy sources such as waste and biomass. This paper provides economic
viability assessment of using these fuels in the district heating system.
Economic evaluation is based on regression analysis from data of existing
plants and on the locally dependent data. Some of parameters that are
dependent of local parameters are price and available fuel quantity,
therefore these values are separately modelled; biomass as a function of
location of the plant while municipal waste as a function of location and the
time changes in waste quantity and composition which depend of socio-economic
trends and legislation. This methodology is applied on the case of district
heating plants in the City of Zagreb where internal rates of return are
calculated for four considered scenarios. Results indicate that waste powered
plant can improve its profitability by co-combusting other local wastes while
economic viability is achieved by introduction of region wide waste
management system. Reducing plant capacity, based on prognosis of waste
generation, showed that these plants can be competitive with biomass plants.
Keywords: district heating systems, municipal solid waste, waste prognosis, waste to energy, economic viability, biomass, waste water treatment, AD sludge