G

Glossary

Biomethane	Gaseous 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-Up	This approach of the scenario building process collects supply and demand data from Gas and Electricity TSOs.
Carbon budget	This 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.
CBA	Cost Benefit Analysis carried out to define to what extent a project is worthwhile from a social perspective.
CCS	Carbon Capture and Storage. Process of sequestrating CO₂ and storing it in such a way that it won’t enter the atmosphere.
CHP	Combined heat and power
DSR	Demand 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.
EC	European Commission
ECI	Energy System Integration Strategy from the European Commission
EV	Electric vehicle
FCEV	Fuel cell electric vehicle
GHG	Greenhouse gas
Hybrid Heat Pump	Heating system that combines an electric heat pump with a gas condensing boiler to optimize energy efficiency.
ICE	Internal combustion engine
IEA	World Energy Outlook
Indirect electricity demand	Indirect 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.
IPCC	Intergovernmental Panel on Climate Change
LNG	Liquefied natural gas
LTS	Long Term Strategy
LULUCF	Land 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.

NECPs	National 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.
NGO	Non-governmental Organization
P2G	Power 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).
P2L	Power to liquids. Combination of hydrogen from electrolysis and Fischer-Tropsch process to obtain synthetic liquid fuels.
P2X	Aggregation of power to gas and power to liquids
PCI	Project of Common Interest
Power-to-Hydrogen/P2Hydrogen	Hydrogen obtained from P2H2
Power-to-Methane/P2Methane	Renewable methane, could be biomethane or synthetic methane produced by renewable energy sources only.
RES	Renewable energy source
Synthetic fuel	Fuel (gas or liquid) that is produces from renewable or low carbon electrical energy.
TEN-E	Trans-European Networks for Energy, EU policy focused on linking the energy infrastructure of EU countries.
Top-Down	The “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.
TSO	Transmission System Operator
TYNDP	Ten Year Network Development Plan