BiomethaneGaseous renewable energy source derived from agricultural biomass (dedicated crops, by-products and agricultural waste and animal waste), agro-industrial (waste from the food processing chain) and the Organic Fraction Municipal Solid Waste (OFMSW).
Bottom-UpThis approach of the scenario building process collects supply and demand data from Gas and Electricity TSOs.
Carbon budgetThis is the amount of carbon dioxide the world can emit while still having a likely chance of limiting average global temperature rise to 1.5 °C above pre-industrial levels, an internationally agreed-upon target.
CBACost Benefit Analysis carried out to define to what extent a project is worthwhile from a social perspective.
CCSCarbon Capture and Storage. Process of sequestrating CO2 and storing it in such a way that it won’t enter the atmosphere.
CHPCombined heat and power
DSRDemand Side Response. Consumers have an active role in the balancing of energy supply and demand by changing their energy consumption according to the energy price and availability. For example by softening demand peaks in case of congestions, or by increasing energy use during surplus supply.
ECEuropean Commission
ECIEnergy System Integration Strategy from the European Commission
EVElectric vehicle
FCEVFuel cell electric vehicle
GHGGreenhouse gas
Hybrid Heat PumpHeating system that combines an electric heat pump with a gas condensing boiler to optimize energy efficiency.
ICEInternal combustion engine
IEAWorld Energy Outlook
Indirect electricity demandIndirect electrification means electricity demand for production of other energy carriers like hydrogen or synthetic liquids for replacing the use of fossil fuels. Besides industrial processes and hydrogen electrolysis, this could be e. g. heat pumps and electric boilers for district heat production.
IPCCIntergovernmental Panel on Climate Change
LNGLiquefied natural gas
LTSLong Term Strategy
LULUCFLand Use, Land Use Change and Forestry. Sink of CO2 made possible by the fact that atmospheric CO2 can accumulate as carbon in vegetation and soils in terrestrial ecosystems.
NECPsNational Energy and Climate Plans are the new framework within which EU Member States have to plan, in an integrated manner, their climate and energy objectives, targets, policies and measures to the European Commission. Countries will have to develop NECPs on a ten-year rolling basis, with an update halfway through the implementation period. The NECPs covering the first period from 2021 to 2030 will have to ensure that the Union’s 2030 targets for greenhouse gas emission reductions, renewable energy, energy efficiency and electricity interconnection are met.
NGONon-governmental Organization
P2GPower to gas. Technology that uses electricity to produce hydrogen (Power to Hydrogen – P2H2) by splitting water into oxygen and hydrogen (electrolysis). The hydrogen produced can then be combined with CO2 to obtain synthetic methane (Power to Methane – P2CH4) or can be converted to other energy carriers like for example synthetic ammonia (P2NH3).
P2LPower to liquids. Combination of hydrogen from electrolysis and Fischer-Tropsch process to obtain synthetic liquid fuels.
P2XAggregation of power to gas and power to liquids
PCIProject of Common Interest
Power-to-Hydrogen/P2HydrogenHydrogen obtained from P2H2
Power-to-Methane/P2MethaneRenewable methane, could be biomethane or synthetic methane produced by renewable energy sources only.
RESRenewable energy source
Synthetic fuelFuel (gas or liquid) that is produces from renewable or low carbon electrical energy.
TEN-ETrans-European Networks for Energy, EU policy focused on linking the energy infrastructure of EU countries.
Top-DownThe “Top-Down Carbon Budget” scenario building process is an approach that uses the “bottom-up” model information gathered from the Gas and Electricity TSOs. The methodologies are developed in line with the Carbon Budget approach.
TSOTransmission System Operator
TYNDPTen Year Network Development Plan

Publishing Info


European Network of Transmission System Operators for Gas
Avenue de Cortenbergh 100
1000 Brussels, Belgium


European Network of  Transmission System Operators for Electricity
Rue de Spa, 8
1000 Brussels, Belgium



Olivier Lebois
Pieter Boersma
Alexander Kättlitz
Maria Chiara Cavarretta

Sub-Team leads of the Joint WG Scenario Building
Joint WG Scenario Building
ENTSOG WG Scenarios
ENTSO-E Regional Groups


DreiDreizehn GmbH, Berlin | www.313.de

Publishing date

April 2021