Combined heat and power in the Swedish district heating sector--impact of green certificates and CO2 trading on new investments

Abstract Combined heat and power (CHP) has been identified by the EU administration as an important means of reducing CO2-emissions and increasing the energy efficiency. In Sweden, only about one third of the demand for district heat (DH) is supplied from CHP. This share could be significantly larger if the profitability of CHP generation increased. The objective of this study was to analyse the extent to which the profitability for investments in new CHP plants in the Swedish DH sector have changed thanks to the recently implemented trading schemes for green certificates (TGCs) and CO2 emissions (TEPs). The analysis was carried out using a simulation model of the Swedish DH sector in which the profitability of CHP investments for all DH systems, with and without the two trading schemes applied, is compared. In addition, a comparison was made of the changes in CHP generation, CO2 emissions, and operation costs if investments are made in the CHP plant shown to be most profitable in each system according to the model. The study shows that the profitability of investments in CHP plants increased significantly with the introductions of TGC and TEP schemes. If all DH utilities also undertook their most profitable CHP investments, the results indicate a major increase in power generation which, in turn, would reduce the CO2 emissions from the European power sector by up to 13 Mton/year, assuming that coal condensing power is displaced.

[1]  Magnus Hindsberger,et al.  Co-existence of electricity, TEP, and TGC markets in the Baltic Sea Region , 2003 .

[2]  Erik O. Ahlgren,et al.  Impacts of a common green certificate market on electricity and CO2-emission markets in the Nordic countries , 2005 .

[3]  Tomas Ekvall,et al.  HEATSPOT—a simulation tool for national district heating analyses , 2006 .

[4]  Leslie G. Fishbone,et al.  Markal, a linear‐programming model for energy systems analysis: Technical description of the bnl version , 1981 .

[5]  Sven Werner,et al.  Rewarding energy efficiency: The perspective of Emissions Trading , 2001 .

[6]  Lars J Nilsson,et al.  International Biofuel Trade - A Study of the Swedish Import , 2004 .

[7]  Richard L. Ottinger,et al.  Compendium of Sustainable Energy Laws: Directive 2003/87/EC of the European Parliament and of the Council of 13 October 2003 Establishing a Scheme for Greenhouse Gas Emission Allowance Trading Within the Community and Amending Council Directive 96/61/EC , 2005 .

[8]  Richard L. Ottinger,et al.  Compendium of Sustainable Energy Laws: Proposal for a Directive of the European Parliament and of the Council on the Promotion of Cogeneration Based on a Useful Heat Demand in the Internal Energy Market , 2005 .

[9]  Unfccc.  Kyoto Protocol to the United Nations Framework Convention on Climate Change , 1997 .

[10]  J Johansson,et al.  Estimating Swedish biomass energy supply , 1999 .

[11]  Helge V. Larsen,et al.  Balmorel: A model for analyses of the electricity and CHP markets in the Baltic Sea region , 2001 .

[12]  Tomas Ekvall,et al.  Effects of planned expansion of waste incineration in the Swedish district heating systems , 2004 .