Plan for Energy Efficiency of Buildings in the Black Sea RegionBSBEEP

Activity 2.3 – Calculation of the CarbonFootprint (CF) on municipal level

Lucian Georgescu – external expertLucian Georgescu – external expert Municipality of GalatiMunicipality of Galati RomaniaRomania

Carbon Footprint StudyPrinciples

Definition : "carbon footprint represents the life cycle of GHG emissions caused by the production of goods and services consumed by a population or activity geographically defined, whether if GHG emissions occur inside or outside the geographical boundaries of the population or interest activities." (Larsen & Hertwich, 2009, p. 792)

It is proposed to analyze the carbon footprint just for existing buildings in the city.

GHG emissions from production and consumption perspective

Methodologies of Carbon Footprint calculation (1)

Methodologies of Carbon Footprint calculation (2)

Environmental input-output analysis ExpandedThe analysis EEIO emissions reported are related to input-output tables, allowing for direct emissions

caused by the production of an entity (product / services) and indirect emissions of its suppliers.

Analysis of life-cycle assessment (LCA PA)Life cycle assessment is based on a process of analysis with a bottom-up approach to assess the environmental impact of individual products manufactured from the beginning to the end of product

life.

Hybrid analysis of type IO-LCACategory :

- tiered hybrid analysis - based on important processes and input - output monetary;- hybrid analysis based on input-output - important processes are studied by means of input - output monetary data;- integrated hybrid analysis - system based process is represented in physical units, while the Input - Output in monetary units

As its major advantage, the hybrid approach enables IOA and PA-LCA to complement each other in the same project.

Standardization and their application scale

Greenhouse Gas accounting standards on different scales of application (Wu, W. 2011).

Emission factor for electricity consumption Formula used for emission factor is:

EFE = [(TCE - LPE - GEP) * NEEFE + CO2LPE + CO2GEP] / ( TCE )

Where:• EFE = local emission factor for electricity [t/MWhe]• TCE = Total electricity consumption in the local authority [MWhe]• LPE = Local electricity production [MWhe]• GEP = Green electricity purchases by the local authority [MWhe]• NEEFE = National or European emission factor for electricity [t/MWhe]• CO2LPE = CO2 emissions due to the local production of electricity [t]• CO2GEP = CO2 emissions due to the production of certified green electricity [t]In the exceptional case where the local authority would be a net exporter of electricity, then

the calculation formula would be:

EFE = ( CO2LPE + CO2GEP ) / ( LPE + GEP)

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The emission factors for heat/cold

consumption Formula used for emission factor is:

EFH = (CO2LPH + CO2IH – CO2EH) / LHCWhere:• EFH = emission factor for heat [t/MWhheat]• CO2LPH = CO2 emissions due to the local production of heat [t]• CO2IH = CO2 emissions related to any imported heat from outside

the territory of the local authority [t]• CO2EH = CO2 emissions related to any heat that is exported outside

of the territory of the local authority [t]• LHC = local heat consumption [MWh heat]A similar formula may apply for cold.

Mathematical Model Proposed for BSBEEP

To realize mathematical models, have been studied methodologies presented in UNEP report (United Nation Enviromental Programe) and in those proposed by CM (Covenant of mayors). For the modeling separation, it has been used a color code: for the industrial sector (purple color) and for domestic/private sector (blue color).

Thus, it has been realized 2 mathematical models that can be applied at city/municipality level on various sectors at certain resource consumptions (electricity, heat, fuel consumption), as follows:

Electricity Industrial sector LCA MethodIO Method

Domestic/Private sector LCA MethodIO Method

Heat Industrial sector LCA MethodNational Standard

Domestic/Private sector LCA MethodNational Standard

The results of these models (LCA and IO) should be gathered and made an average of them, according to the methodology applied at a city level. This value resulted from

the summing up, represents the final result, in order to estimate the carbon footprint of the city due to electricity consumption of industrial sector or domestic/private

sector.

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Conclusions StudiesAfter may 2014

City ACity BCity CCity DCity E

Final Results

Expected results after the implementation of recommendations made in the project studies

City ACity BCity CCity DCity E

Thank you for your attentionThank you for your attention!!