Work

Application and extension of 223P ontology for the district heating domain

Year: 2025

Type: article

Abstract: Digitalization of district heating networks (DHNs) is vital for decarbonizing the heating sector, yet the lack of a standardized data model forces operators to build bespoke interfaces and impedes integration of new digital services. Existing ontologies such as OEO, CityGML and various DHN-specific models proved inadequate or poorly maintained for unambiguous DHN representation. We evaluated three interoperable building-domain ontologies—Bricks, 223P and Real Estate Core—and extended 223P to cover the unique information requirements of DHNs. In two case studies (SimKiMop and TrafoWärmenetze), the extended ontology successfully modeled network topology and heat-generation unit attributes for optimization and transformation planning. Using our extension and accompanying modeling guidelines, we generated interoperable RDF data graphs, enabled network visualization, and automated the creation and execution of optimization models. To ensure broad adoption, we are contributing this work to the IEA Annex TS9 framework, engaging municipal utilities via AGFW, and providing supporting tools and scripts for DHN model construction and validation.

Source: Zenodo (CERN European Organization for Nuclear Research)

DOI: 10.5281/zenodo.16792169

Authors: Wolff, Christian, Wallner, Steffen, Ziebarth, Mathias

Institutions: Fraunhofer Institute for Solar Energy Systems, Fraunhofer Institute of Optronics, System Technologies and Image Exploitation

Language: English

Topic: Integrated Energy Systems Optimization

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Affordable and clean energy, Industry, innovation and infrastructure, Climate action

Open Access status: green

Funder: Bundesministerium für Wirtschaft und Klimaschutz