Biomass And Waste Incineration CHP:
The Co-benefits Of Primary Energy Savings,
Reduced Emissions And Costs
Author(s)
F. Levihn & C. Nuur
Abstract
Energy utility companies face trade-offs in navigating through today’s
environmental challenges. On the one hand they face intense political, social and
environmental pressures to move towards adopting energy systems that
incorporate the use of renewable energy resources. By making this transition
they would contribute to carbon reduction and mitigate climate change. On the
other hand, they need to coordinate their resources and become efficient when
investing in new plants or upgrading existing production systems. This paper
seeks to address the gains that utility companies can make when replacing older
fossil fuel base- plants with efficient combined heat and power (CHP) plants. We
discuss the system effects from the changes in production of other units when
new plants are constructed. Using one of the largest energy utility companies in
Sweden, Fortum, as an empirical point of departure, we analyzed the company’s
transition from using coal and hydrocarbons to an increased use of renewables
and waste incineration CHP. Our analysis was based on comprehensive
production data on CO2, SOx and NOx emissions. Our findings suggest that
primary energy consumption drops when older and less efficient fossil plants are
substituted for new efficient CHP plants; this drop includes the effect on the
remaining production. The benefits in terms of primary energy savings might be
even greater than what are achieved in meeting the goal of climate change
abatement through reduced CO2 emissions; NOx and SOx emissions are
decreased with new biomass CHPs. Waste incineration CHP increase NOx and
SOx emissions, when there is less fossil fuel to replace after the use of biomass is
extended. In both cases, economic efficiency increases as costs are reduced.
Keywords: district heating, environmental impact, primary energy consumption.
Keywords
district heating, environmental impact, primary energy consumption.
Related Book
Other papers in this volume
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