ECONOTEC EXPERIENCE IN BELGIUM : ENERGY DEMAND MODELLING WITH THE EPM BOTTOM-UP MODEL UNFCCC Workshop on GHG Emission Projections Bonn, 6-8 September 2004.

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ECONOTEC EXPERIENCE IN BELGIUM : ENERGY DEMAND MODELLING WITH THE EPM BOTTOM-UP MODEL UNFCCC Workshop on GHG Emission Projections Bonn, 6-8 September 2004 Francis ALTDORFER, ECONOTEC

ECONOTEC EPM (Emission Projection Model) : Developed by ECONOTEC in the framework of studies for Belgian public authorities. Has been used for the 3 rd National Communication, in conjunction with the HERMES macroeconomic model (of the Federal Planning Bureau).

ECONOTEC METHODOLOGICAL APPROACH SOME KEY ISSUES

ECONOTEC Observation No. 1 In Belgium, a crucial role is to be played by energy demand management. A large share of electricity production is covered by nuclear energy (56% in 2002) and natural gas (23%), while the potential for renewable electricity production is small. Therefore the options for GHG emission reduction in the energy transformation sector are limited.

ECONOTEC Observation No. 2 There is no simple relationship between the economic activity of a sector and its emission level. Importance of structural effects : Within a same sector (iron & steel, non metallic minerals…), the intensity of CO2 emissions may easily vary by a factor of 10.

ECONOTEC

Observation No. 3 There is a substantial emission reduction potential with negative costs. This is confirmed by over 50 audits carried out by ECONOTEC on large industrial sites in all kinds of sectors.

ECONOTEC

Methodological consequences Need to be as as close as possible to the physical reality : a (very) disaggregated bottom-up type of model, activity variables in physical units. Simulation rather than optimisation … rather a sensitivity analysis to a set of hypotheses than a representation of the optimal solution. Need to focus on energy demand modelling.

ECONOTEC MAIN FEATURES OF EPM

ECONOTEC EPM is a simulation model allowing to calculate : -business-as-usual scenarios (unchanged policy); -technical and economic potentials for reducing emissions; -emission reduction cost curves and to simulate emission reduction scenarios.

ECONOTEC Essential characteristic of the model : the high disaggregation level of emission sources.

ECONOTEC Objectives of the disaggregation take into account structural effects within the sectors to better take into account the available field information (on plant closures, new investments…); to take into account mitigation measures specific to particular sources.

ECONOTEC Disaggregation levels Industry ± 70 among the most energy intensive activities iron & steel :10 activities (sinter production, blast furnace, oxygen steel, hot rolling…) chimie : ± 20 activities (ethylene, chlorine, vinyl chloride, ammonia…) …

ECONOTEC Residential Specific module for calculating the heat load of buildings : 14 representative model-dwellings, with dimensioning and thermal characteristics; performance de 15 heat production, distribution and emission systems; sanitary hot water; 10 specific electricity usages (cooking, refrigerators, washing machines, dryers…).

ECONOTEC Tertiary sector 30 sub-sectors, grouped in 8 categories : commerce banks, insurance… education health services public administrations culture, sports & leasure …

ECONOTEC Transport Specific module for the detailed modelling of road transport : - 11 categories of vehicles - 3 types of driving patterns - 3 types de fuel - distribution of cars by age class - emission levels of the regulation in force when first put on the road

ECONOTEC Emission reduction potential Technical potential: maximum penetration of each mitigation measure Economic potential = fraction of technical potential for which : Marginal cost < Marginal cost ceiling

ECONOTEC The dispersion in costs from one site to another is taken into account. Probability law around the mean value. ==> Avoids an “all-or-nothing” effect on the penetration of measures.

ECONOTEC Techno-economic database on mitigation measures Base year : - detailed energy balance -activity variables -emission factors -… Evolution of : - activity levels -specific energy consumptions -fuel market shares - emission factors Business-as-usual scenario (BAU) Emission reduction scenario Scenario hypotheses : -energy prices -ceiling on marginal reduction cost -discount rates -… EPM scenario development

ECONOTEC Other features multi-pollutant (CO2, CH4, N2O, HFCs, PFCs, SF6, SO2, NOx, VOCs) modelling at regional and national level with same approach and common or harmonized hypotheses (has been applied for : Belgium, Wallonia, region of Brussels-Capital, Luxembourg)./...

ECONOTEC possibility to calculate the impact on the reduction potential of measures such as : -taxes, subsidies -regulations -efficiency improvement objectives (e.g. voluntary agreements) easy updating in case of a modification of key variables (industry sector evolution, technological evolution…)

ECONOTEC many exogenous data needed ==> large database, with permanent improvement process; allows to test the sensitivity to numerous parameters for macroeconomic framework, coupling made with macroeconomic model (HERMES in case of 3rd National Communication)

ECONOTEC New developments Organisation of the transfer of the model to the administration of the Walloon Region (to allow it to make simulations by itself) Coupling to GreenMod, macroeconomic general equilibrium model of the University of Brussels (Prof. Bayar)

ECONOTEC SOME CHALLENGES FOR GHG EMISSION MODELLING

ECONOTEC Size of the reduction potential with negative cost Barriers to "rational decision making". This makes it more difficult to assess the impact of policies, in particular of economic instruments (taxation…).

ECONOTEC EPM quantifis potentials with negative costs. Tentative solutions : use higher discount rates, to reflect the short payback-times required by consumers introduce adjustment costs reduce the weight of energy costs in objective function …

ECONOTEC Link between bottom-up and macroeconomic modelling Both approaches are complementary. The difficulty stems in particular from the different disaggregation levels. As mentioned above, EPM has been linked with HERMES and GreenMod.

ECONOTEC Projections of HFCs, PFCs and SF6 emissions The 3 rd Belgian National Communication did not comprise such projections. This is a relatively new area. Since then, ECONOTEC has carried out these projections for the Federal Department of the Environment.

ECONOTEC Difficulties faced for F-gases : the number of gases and mixtures of gases involved the variety of emission sources the fact that emissions often arise from stocks of gases accumulated in equipment the shortage of data on stocks, losses, etc. A specific model development has been carried out.