Work

City energy transitions: Modelling policy alignments with sectoral integration at sub-city levels

Year: 2025

Type: article

Abstract: Cities have implemented strategies to transform their energy systems and support national and regional climate action. However, studies examining their long-term alignment remain limited. This study aims to investigate how local energy strategies align with national and regional climate objectives. Scenarios aligned with local, national, and European policy are formulated. Cost-optimization model, based on TIMES, is developed to analyse long-term developments in the heating and transportation sectors. Spatial characterization of demographics is utilized to analyse sectoral developments at sub-city levels. Distribution grid infrastructure and bioresource allocation are accounted for. With applied policy scenarios, significant reduction in emissions is observed compared to the reference scenario. Due to varying intermediary targets, large gaps exist in the emission trajectories across scenarios in the near-term. The city energy plan yields a 33 % reduction in cumulative emissions, while national plans achieve a 25 % reduction relative to the reference case. At the sectoral level, residential heating and cars shift towards electrification, and penetration rates differ with applied policy and socio-economic conditions. In areas with little to no existing electrified heating, distribution grid capacity needs to more than double to support the accelerated electrification. The use of bio-resources exhibits a gradual increase in the heating sector, while peaking around 2030 in the transportation sector before declining to nearly zero by 2050. The changing utilization of bio-resources highlights their varying role in the transition of the different sectors. The study shows considerable short-term policy misalignment with potential impacts on cost-optimal developments. Electrification and bioresources play key roles in the decarbonization journey.

Source: Energy

DOI: 10.1016/j.energy.2025.139659

Authors: Kushagra Gupta, Kenneth Karlsson, Erik O. Ahlgren

Institutions: Chalmers University of Technology, IVL Swedish Environmental Research Institute

Language: English

Topic: Integrated Energy Systems Optimization

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Industry, innovation and infrastructure, Sustainable cities and communities, Climate action, Affordable and clean energy, Reduced inequalities

Open Access status: hybrid

Estimated APC paid: $4,260