14. Glossary

Name	Description
model parameter	A feature in the model that is not controlled by the designer, but affects the model outputs, i.e. the solar irradiance.
design variable	A feature in the model that is controlled by the designer and affects the model outputs, i.e. the capacity of the photovoltaic array.
quantity of interest	The model output of interest, for which the stochastic features are quantified, i.e. mean, standard deviation, Sobol’ indices.
population	The set of design samples considered during the design optimization.
fitness	The objective values for the design samples considered during the design optimization.
objective	The goal of the optimization, i.e. the minimization of the carbon intensity mean.
Sobol’ indices	Sensitivity indices which quantify the contribution of the variance of the model inputs to the variance of the quantity of interest.
hydrogen-based energy system	An energy system that produces and uses hydrogen as an energy carrier.