D5.3 Synthesis report of the broad insights and analysis of WP3 and WP4

This Deliverable D5.3 synthesised and summarised the work undertaken in INNOPATHS Work Packages 3 and 4, and the insights deriving from them. It reviewed the four different narratives of deep decarbonisation created by the project through a process of co-design with stakeholders: New Players and Systems; Incumbents; Efficiency and Sufficiency; and Europe of Multiple Speeds. From the narratives, scenarios were modelled using the models mentioned below, and outlined the two different online tools produced to facilitate the development and exploration of scenarios in general (Energy System Decarbonisation Simulator) and the four scenarios (Low Carbon Pathways Platform). Many improvements were made to three energy system/Integrated Assessment Models used in the project: PRIMES, REMIND and ETM-UCL. The models were then used to model the INNOPATHS scenarios above. Additionally, a number of detailed sectorial models were used to undertake new studies of decarbonisation in different sectors: electricity; buildings (residential and commercial sectors); transport and industry, with the key industrial sub-sectors studied being iron and steel, non-metallic minerals (including cement), chemicals and petrochemicals, and pulp and paper.