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IntegrCiTy is an ERA-NET European project involving researchers and industrial partners from Sweden, Switzerland and Austria.

The main overall objective is to develop and implement a modular decision-support platform focusing on planning and designing integrated energy networks through multi-energy/networks co-simulation. Three pilot cases are under investigation: Hammarby Sjöstad (Stockholm, Sweden), Geneva (Switzerland) and Vevey (Switzerland).

Funded by:

ERA-NET Cofund Smart Cities and Communities

Time period:

March 2016 – October 2019

Project partners:

EPFL Energy Center (Project coordinator)




CREM (Centre de Recheches Energétiques et Municipales)

HES-SO (Haute Spécialisée de Suisse Occidentale Valais-Wallis)

AIT (Austrian Institute of Technology)

AEE INTEC (Institute for Sustainable Technologies)

KTH (Royal Institute of Technology)

HOVAL AT (Hoval Austria)

CT GE (République et Canton de Genève)

SIG (Services Industriels de Genève)

EPS (Europé Power Solution)

VS (Veolia Sverige)

HSA (Holdigaz SA)

EC (ElectriCITY)

RB (Riksbyggen)

City of Stockholm


Nowadays, energy supply networks in cities – natural gas, electricity and heating/cooling - are almost always planned and operated separately from each other. The main issues to be faced are related, on one hand, to resources and needs spatial disparity and, on the other hand, to non-simultaneous demand and production. The impact will be even larger due to the increasing number of decentralized (mostly non-dispatchable) production systems and the foreseen changes in consumers’ behavior. The challenge and a part of the solution lie in the combination of storage and multi-energy conversion systems. This combination allows energy systems to adapt to an increasingly decentralized energy production, interacting with existing networks (natural gas, electricity, heating and cooling). These “smart integrated solutions” for energy management and conversion increase interoperability capabilities between different energy vectors, and open opportunities to develop additional, innovative services to the one based on existing infrastructures and related supply structures.

Aim and objectives

1. Developing an integrated decision-support environment for city planners and energy providers to improve efficiency and resilience of energy supply infrastructures, focusing on deployment, extension and retrofitting;

2. Implementing the decision-support platform and embedded tools in selected cities, for local utilities and city administrations, focusing on thermal and electrical networks linked to low-carbon resources


IntegrCiTy project aims at developing and implementing a modular decision-support platform focusing on planning and designing integrated energy networks and further infrastructure developments (extensions, new deployments, retrofitting) through multi-energy/networks cosimulation. The project is organized along two parallel and interdependent axes:

  • Axe I - Decision-support platform development
    • Develop the appropriate IT and data structure/management
    • Characterize the urban system at both energy demand and supply infrastructure levels by adapting existing or developing simulation models
    • Develop decision-support environment based on scenarios
    • Co-simulation process
  • Axe II - Implementation test-cases in collaboration with local authorities and utilities
    • Vevey (Switzerland)
    • Geneva (Switzerland)
    • Hammarby Sjöstad (Stockholm, Sweden)


Puerto P, Widl E, Page J. ZerOBNL: A framework for distributed and reproducible co-simulation. 2019 7th Work Model Simul Cyber-Physical Energy Syst 2019:1–6. doi:10.1109/mscpes.2019.8738787

Arnaudo M, Topel M, Puerto P, Widl E, Laumert B. Heat demand peak shaving in urban integrated energy systems by demand side management - A techno-economic and environmental approach. Energy 2019;186:115887. doi:10.1016/

Project contact persons

Role in the project: modeling and co-simulation of urban integrated energy systems

Recycling of end-of-life wind blades through renewable energy driven molten salt pyrolysis process
I-UPS — Innovative High Temperature Heat Pump for Flexible Industrial Systems
FLUWS — Flexible Upcycled Waste Material based Sensible Thermal Energy Storage for CSP
STAMPE – Space Turbines Additive Manufacturing Performance Evaluation
Digital Twin for smart grid connected buildings
PED StepWise — Participatory Step-by-Step Implementation Process for Zero Carbon District Concepts in Existing Neighbourhoods
ADiSS — Aeroelastic Damping in Separated Flows
MERiT — Methane in Rocket nozzle cooling channels - conjugate heat Transfer measurements
CARE – Cavity Acoustics and Rossiter modEs
SCO2OP-TES – sCO2 Operating Pumped Thermal Energy Storage for grid/industry cooperation
POWDER2POWER (P2P) – MW-scale fluidized particle-driven CSP prototype demonstration
eLITHE – Electrification of ceramic industries high temperature heating equipment
DETECTIVE – Development of a Novel Tube-Bundle-Cavity Linear Receiver for CSP Applications
USES4HEAT – Underground Large Scale Seasonal Energy Storage for Decarbonized and Reliable Heat
ADA – Aggressive Duct Aerodynamics
VIFT — Virtual Integrated Fan and Turbine
HECTAPUS — Heating Cooling Transition and Acceleration with Phase Change Energy Utilization Storage
SUSHEAT — Smart Integration of Waste and Renewable Energy for Sustainable Heat Upgrade in the Industry
Analysis of PV system in Sweden
EVAccel — Accelerating the Integration of Electric Vehicles in a Smart and Robust Electricity Infrastructure
Towards Sustainable Energy Communities: A Case Study of Two Swedish Pilot Projects
HYBRIDplus – Advanced HYBRID solar plant with PCM storage solutions in sCO2 cycles
SHARP-SCO2 – Solar Hybrid Air-sCO2 Power Plants
RIHOND – Renewable Industrial Heat On Demand
A turnkey solution for Swedish buildings through integrated PV electricity and energy storage (PV-ESS)
A new standard methodology for assessing the environmental impact of stationary energy storage systems (LCA-SESS)
EleFanT – Electric Fan Thruster
Circular Techno-Economic Analysis of Energy Storage– IEA Annex Co-coordination
Optimization of Molten Salt Electric Heaters
FLEXnCONFU: Flexiblize Combined Cycle Power Plants through Power To-X Solutions using Non-Conventional Fuels
ARIAS - Advanced Research Into Aeromechanical Solutions
PILOTS4U – A network of bioeconomy open access pilot and multipurpose demo facilities
Cavity Purge Flows inside axial turbines
Effective thermal storage systems for competitive Stirling-CSP plants
ENFLOW: Energy flow metering of natural and biogas for residential applications
H2020 Pump Heat
BRISK II – Infrastructure for Sharing Knowledge II
Improved flue gas condensate treatment in MSW incineration via membrane distillation
Integrated modelling and optimization of coupled electricity and heating networks
Membrane distillation for advanced wastewater treatment in the semiconductor industry
Microgrid for Tezpur University
Smart and Robust Electricity Infrastructure for the Future