Abwärme_4_Kapfenberg - 100 % industrielle Abwärmeauskopplung Kapfenberg
Short Description
Starting point / motivation
According to the results of the project concerning the climate neutrality roadmap "Kapfenberg_2_zeroCO2", which is currently in its final phase, it was determined that currently around 84% of the local district heating supply is based on natural gas and only the remaining heat requirement is based on industrial waste heat.
However, it has also been shown that even with the planned tripling of district heating supply, industrial waste heat could completely cover the heat energy consumed. Despite efforts to increase the proportion of industrial waste heat in the future and to contribute the rest via biomass, 100% industrial waste heat utilisation is not foreseen yet.
A seasonal heat storage system (STES) is required for 100% integration of industrial waste heat, as waste heat availability and heat consumption are shifted in time. In winter in particular, the demand for heat is significantly higher than in summer and industrial waste heat is discontinuous due to so-called batch processes.
Based on "Kapfenberg_2_zeroCO2", it was determined that the conditions for Kapfenberg to create such a large STES is basically given by the abandoned mining tunnels. According to a recently completed study commissioned by the European Investment Bank, the most economical technology mix in urban heating networks 4.0 is the combination of a favourable heat source (e.g. industrial waste heat) with 85% annual coverage and an electrically operated heat pump.
Applied to Kapfenberg, this would mean that industrial waste heat could supply the STES and the heat pump would be activated at times of surplus renewable electricity.
This combination maximises the consumption of industrial waste heat and biomass stays available for other applications. The P2H application (heat pump) can be operated grid-friendly by using surplus electricity, and also represents a back-up system when the availability of industrial waste heat is not given, for example due to industrial shutdown.
The approach described above of maximising industrial waste heat extraction is completely different from "mixing in", whereby numerous problems have to be solved for the industrial city of Kapfenberg.
- Where and how could an STES be built?
- What technological mix is suitable for the concept?
- What investment and operating costs can be expected with this approach?
- How could the concept be integrated in the existing district heating system?
- What impact would a STES have on urban development and spatial planning?
Contents and goals
- Exploring the feasibility of maximising industrial waste heat extraction in the municipality of Kapfenberg up to 100%
- Exploration of a technology mix for decoupling, a back-up solution and STES
- Techno-economic analysis of the concept
- Recommendations for step-by-step integration
Expected results
- Feasibility of maximising industrial waste heat extraction in the municipality of Kapfenberg up to 100% established
- Technology mix for decoupling including back-up solution and seasonal storage known
- Techno-economic evaluation of the concept
- Recommendations including an action plan for gradual implementation
- Sustainable contribution to the decarbonisation of the heating sector while minimising / reducing the use of biomass and relieving the electricity grid
Project Partners
Project management
4ward Energy Research GmbH
Project or cooperation partners
- Ringhofer & Partner GmbH
- Stadtwerke Kapfenberg GmbH
Contact Address
Dr. Christof Bernsteiner
Reininghausstrasse 13A
A-8020 Graz
Tel.: +43 (664) 10 777 63
E-mail: christof.bernsteiner@4wardenergy.at
Web: www.4wardenergy.at