GreenH2armony® is a web-based tool for the calculation of harmonised life-cycle indicators of hydrogen.
This calculation requires that:
The user must have a life cycle assessment of a hydrogen energy system whose carbon, energy and/or acidification footprint he/she would like to harmonise.
The study to be harmonised must be attributional and include a hydrogen production phase.
The user must be able to identify and classify the
hydrogen production technologyElectrolysis, reforming, gasification, etc. involved,
as well as the hydrogen carrierNatural gas, biogas, water, biomass, etc. and the
driving energyGrid electricity, wind power, heat from natural gas, etc..
The user must know the functional unit used in the original study and the stages involved in the system's life cycle.
The user must know the original results for the indicators to be harmonised. When the system includes
stages beyond hydrogen purificationHydrogen compression, storage, distrubution, use,
the user also must know the impacts specific to these stages.
The user must be able to identify multifunctional subsystems and quantitatively define
the approachAvoided burens, economic allocation, mass allocation, etc.
followed to address multifunctionality.
When harmonising the carbon footprint, the impact assessment method used in the original study must be IPCC-based (100-year horizon; at least
CO2, N2O and CH4) and expressed in kg CO2 eq.
When harmonising the energy footprint, the impact assessment method must be based on the quantification (in MJ) of the
fossil+nuclear energy demand from a life-cycle perspective.
When harmonising acidification, the impact assessment method used in the original study must be CML-based and expressed in kg SO2 eq.