Assessment of the Greenhouse Gas Emissions from Cogeneration and Trigeneration Systems. Part II: Analysis Techniques and Application Cases

This paper provides a set of specific examples to show the effectiveness of the trigeneration CO2emission reduction (TCO2ER) indicator proposed in the companion paper (Part I: Models and indicators) to assess the greenhouse gas (GHG) emission reduction from cogeneration and trigeneration systems. Specific break-even analyses are developed by introducing further indicators, with the aim of assessing the conditions for which different types of combined systems and conventional separate production systems are equivalent in terms of GHG emissions. The various emission indicators are evaluated and discussed for a number of relevant application cases concerning cogeneration and trigeneration solutions with different types of equipment. Scenario analyses are carried out to assess the possible emission reduction benefits from extended diffusion of cogeneration and trigeneration in regions characterized by different energy generation frameworks. The results strongly depend on the available technologies for combined production, on the composition of the energy generation mix, and on the trend towards upgrading the various generation systems. The numerical outcomes indicate that cogeneration and trigeneration solutions could bring significant benefits in countries with prevailing electricity production from fossil fuels, quantified by the use of the proposed indicators.

[1]  H. Laurikka,et al.  Emissions trading and investment decisions in the power sector—a case study in Finland , 2006 .

[2]  K. R. Voorspools,et al.  The impact of the implementation of cogeneration in a given energetic context , 2002 .

[3]  Svend Bram,et al.  Co-utilization of biomass and natural gas in combined cycles through primary steam reforming of the natural gas , 2007 .

[4]  Francis Meunier,et al.  Co- and tri-generation contribution to climate change control , 2002 .

[5]  Aristide F. Massardo,et al.  Hybrid systems for distributed power generation based on pressurisation and heat recovering of an existing 100 kW molten carbonate fuel cell , 2003 .

[6]  Ruzhu Wang,et al.  COMBINED COOLING, HEATING AND POWER: A REVIEW , 2006 .

[7]  Hongwei Li,et al.  Thermal-economic optimization of a distributed multi-generation energy system¿A case study of Beijing , 2006 .

[8]  Azra Selimovic,et al.  Networked solid oxide fuel cell stacks combined with a gas turbine cycle , 2002 .

[9]  N. D. Hatziargyriou,et al.  Environmental benefits of distributed generation with and without emissions trading , 2007 .

[10]  Antonio Piacentino,et al.  Cogeneration: a regulatory framework toward growth , 2005 .

[11]  Daniele Fiaschi,et al.  CO2 abatement by co-firing of natural gas and biomass-derived gas in a gas turbine , 2007 .

[12]  Pierluigi Mancarella,et al.  Assessment of the greenhouse gas emissions from cogeneration and trigeneration systems. Part I: Models and indicators , 2008 .

[13]  Francis Meunier,et al.  Environmental assessment of biogas co- or tri-generation units by life cycle analysis methodology , 2005 .