JRC TIMES energy system model for the EU

The JRC-EU-TIMES model aims to analyse the role of energy technologies and their innovativeness for meeting European policy targets related to energy and climate change. The JRC-EU-TIMES represents the EU 28 energy system and neighbouring countries from 2010 to 2050. The JRC-EU-TIMES model produces projections (or scenarios) of the EU energy system showing its evolution up to 2050 under different sets of specific assumptions and constraints. The JRC-EU-TIMES model is an improved offspring of previous European energy system models developed under several EU funded projects, such as NEEDS, RES2020, REALISEGRID, REACCESS and COMET.

The JRC-EU-TIMES model's algorithm solves for the optimum investment portfolio of technologies along the entire supply chains for five sectors, while still fulfilling the energy-services demand. JRC-EU-TIMES is generated with the TIMES model generator from ETSAP of the International Energy Agency, which combines a detailed technology specification with an optimisation solver. JRC-EU-TIMES simultaneously decides on equipment investment and operation, primary energy supply and energy trade. As a partial equilibrium model, JRC-EU-TIMES does not model the economic interactions outside of the energy sector. Furthermore, it does not consider in detail demand curves and non-rational aspects that condition investment in new and more efficient technologies. More information on the TIMES family of model can be found on the IEA Energy Technology website, http://www.iea-etsap.org/web/index.asp

The main role of JRC-EU-TIMES in the policy cycle is anticipation, with a focus on technology policy. Technology policy analyses with JRC-EU-TIMES can complement the European Commission's reference analyses in the areas of energy, transport and climate action. The baseline scenario of JRC-EU-TIMES is always aligned to the latest EU reference scenario. A typical question that JRC-EU-TIMES can address is which technological improvements are needed to make technologies competitive under various low-carbon energy scenarios. JRC-EU-TIMES can support studies which require (1) modelling at the level of an energy system, (2) a high detail of technologies, and (3) intertemporal results on the evolution of the energy system.

The JRC-EU-TIMES is a model of the energy system within the EU28 and certain neighbouring countries (Iceland, Norway, Switzerland and the Western Balkans). It provides a coherent framework to quantitatively assess the development needs for each of the identified technology sectors under different climate and energy pathways in Europe, up to 2050.

The TIMES model generator from ETSAP allows for a detailed techno-economic description of resources, energy carriers, conversion technologies and energy demands. TIMES-based energy system models include upstream energy flows up to the level of resource-mining and imports. After its transformation from primary energy (through refineries and power plants, among other technology options), final energy can be consumed within different economic sectors (e.g. residential, tertiary/services, industry or transportation). An important difference to other models which cover only a single subsector of the energy system is that in TIMES the subsectors can interact with each other.

The JRC-EU-TIMES database contains:

1. JRC-EU-TIMES logic: includes those specific equations (and relationships) between different variables of the model which are not included in the general TIMES model generator from ETSAP. Specific equations introduced by JRC include, for example, relationships between the operation of dispatchable power plants and the amount of variable power generation (e.g. from certain RES).
2. JRC-EU-TIMES data: includes fixed numeric techno-economic parameters representing the energy system such as:
   1. End-use energy services and materials’ demand
   2. Present and future sources of primary energy supply and their potentials
   3. Key characteristics of existing and future energy-related technologies, such as efficiency, technological stock, availability, investment costs, O&M (operation and maintenance) costs and discount rates
   4. Policy constraints, such as emission limits or energy efficiency targets and other policy assumptions.

The JRC-EU-TIMES model solves an optimisation problem for the horizon 2005-2065 by minimising the total discounted energy-system cost needed to meet the future demand for energy services. The energy-system cost includes investments in supply and demand technologies, operational expenses and fuel costs. The optimisation horizon is divided into 9 periods. Each period consists of equal years that are divided in 12 time-slices that represent an average of day, night and peak demand for each of a year’s four seasons. To address flexibility issues, each time-slice of the power sector is further split into two sub-periods – this additional dimension allows differentiation of situations where variable RES electricity generation exceeds demand from those situations where this is not the case. Using this approach, the JRC-EU-TIMES model is able to model and compare curtailment with different transformation or storage options in cases of excessive variable RES electricity production.

TIMES family based energy system models are used (i) in the member states and non-EU countries (e.g. UK, France, Spain, Germany, Italy, Japan, US) to model energy policy scenarios, (ii) in the private sector (e.g. EdF) to support decisions on investment priorities, (iii) in international organisations (e.g. IEA) to model future technology scenarios in order to meet certain decarbonisation targets. More information on the TIMES family of model can be found on the IEA Energy Technology website, http://www.iea-etsap.org/web/index.asp More information on the JRC-EU-TIMES model can be found in the JRC Science and Policy report The JRC-EU-TIMES model - Assessing the long-term role of the SET Plan Energy technologies (JRC85804, http://publications.jrc.ec.europa.eu/repository/handle/JRC85804)

The model is supported by a detailed database, with the following exogenous inputs:

• End-use energy services and materials demand, such as residential lighting, machine drive requirements or steel; The materials and energy demand projections for each country are differentiated according to economic sector and end-use energy service. These were generated by the macroeconomic projections from the GEM-E3 model at JRC IPTS. These are: GDP growth; private consumption as a proxy for disposable income; price evolution and sector production growth for industry, services, transports and agriculture. In TIMES, these macroeconomic drivers are transformed into the different final annual end-use demand projections. The residential sector requires a more detailed approach to generate the demand for heat, cooling and hot water, since they depend on the characteristics of the dwellings. The projection of energy end-uses for the residential sector involves several steps:the projection of the number of dwellings and their allocation by category (rural, urban single house or urban apartments); the projection of the heat/cooling/hot water demand per dwelling by category, and the projection of the total demand.The main data sources are EUROSTAT and several National Statistics Institutes, as well as other existing databases such as ENTRANZE, TABULA, and the BPIE Buildings Performance Institute Europe.
• Characteristics of the existing and future energy related technologies, such as efficiency, stock, availability, investment costs, operation and maintenance costs, and technology-specific discount rate; The energy supply and demand technologies for the base-year (2005) are characterised considering the energy consumption data from EUROSTAT to set sector specific energy balances to which technologies profile must comply. Information on installed capacity, efficiency, availability factor, and input/output ratio were introduced using diverse national sources. This was followed by a bottom-up approach that adjusted the technologies specifications to achieve coherence with official energy statistics. This bottom-up approach was very relevant for the residential and commercial sectors, for which there is less detailed information on existing technologies. The energy supply and demand technologies beyond the base year are compiled in an extensive database with detailed technical and economic characteristics of new energy technologies. The two most relevant sources of this database are the Energy Technology Database (for electricity generation) hosted at JRC-IET and the JRC-IET periodic publication ETRI - Energy Technology Reference Indicators projections for 2010-2050. The technology-specific discount rates are aligned to those used in the PRIMES model and that underlie the EU Reference Scenarios (EU Energy, transport and GHG emissions. Trends to 2050).
• Present and future sources of primary energy supply and their potentials; The present and future sources of primary energy and their constraints (fossil and renewable energy) for each country are from derived from several sources. For renewables, the maximum potentials come from the NEEDS project, updated with IET experts' own assumptions. For selected renewables (biomass and solar, wind forthcoming) the potentials have been derived following a detailed and transparent methodology with experts' inputs.
• Policy constraints; The policy constraints as CO2 emission caps, tax, subsidies and emission trading are user-defined and can be tailored for each particular policy question. The typical configuration of the model include a current policy initiative scenario, implementing agreed emission reduction, renewable energies, and energy efficiency targets; and strong decarbonisation scenarios. Targets for the penetration of specific renewable technologies can also be implemented.