In the NENIA project, a Germany-wide waste heat cadastre of all industrial sites will be created for the first time and compared with a heat atlas of energy efficiency-classified residential and non-residential buildings. This can be used to determine the potential of industrial waste heat that can be fed into heating networks and distributed to supply buildings and districts.
Waste heat utilisation offers a significant field for achieving efficiency. Previous estimates made by the research project assume up to 300 PJ of high-temperature waste heat (> 140 °C) and 160 PJ of low-temperature waste heat (60-140 °C) from industrial processes. Among other things, this could be used to supply heat to additional buildings by feeding them into heating networks. In order to improve the integrated use of heat beyond operating limits, there is a need for a comprehensive and systematic survey of the usable waste heat potential from various industrial production processes. This requires spatially and temporally high-resolution detection and intersection of the waste heat supply and heat demand – a so-called heat source heat sink analysis.
The aim of the project is to create a nationwide waste heat cadastre for the potential assessment and increased use of industrial waste heat in heating networks. For the first time, industrial waste heat flows at individual industrial locations are being classified and located nationwide based on emission declarations provided by incineration plants in accordance with Germany's 11th Federal Immission Control Ordinance. In addition, based on the three-dimensional building models used by the various federal state land surveying offices, a comprehensive, spatially high-resolution heat atlas for the existing residential and non-residential building stock in Germany is being created and linked with refurbishment scenarios from ifeu's GEMOD building model. Practice-based surveys in industrial companies will survey specific barriers to grid-based waste heat utilisation. The results will be combined in a spatial analysis to derive the waste heat feed-in potential in heating networks and used to derive options for action. The technical and legal usability of the created waste heat cadastre will be checked.
ifeu will apply its expertise in modelling the heat consumption of residential and non-residential buildings, including with the GEMOD building model, with regard to GIS methods for preparing the nationwide heat atlas, as part of preliminary work for classifying industrial waste heat flows and in designing the policy framework for utilising waste heat.
GEF Ingenieur AG has already participated in the creation of a nationwide digital heat atlas in a predecessor project and has created numerous heat atlases as part of supply concepts.
Geomer GmbH will contribute its technical know-how in procuring and processing geodata. Indevo GmbH as an industrial service provider will provide know-how for implementing practice-based case studies in companies.
Milestones and successes
So far, a comprehensive geo-database of 4,000 industrial sites has been created with fuel and process electricity inputs and according to the amount, temperature, humidity and pollutant load of the classified waste gas flows. As a result, almost 90% of the industrial fuel use and around 75% of the process heat from electricity have been covered in the balancing. In addition, the 3D building models of all residential and non-residential buildings have been classified in energy efficiency terms and a procedure for calculating the heat consumption as a function of the energy efficiency refurbishment levels has been developed. As part of the practice-based surveys, around 250 industrial companies with theoretical waste heat potential have been contacted. The described data levels will be merged in a GIS potential model in the coming months.
The GIS platform for industrial waste heat flows, including the spatially located heat sinks and heating network infrastructures, is expected to be usable by June 2017 as part of the project. The newly created nationwide heat atlas is based on chargeable data and will be licensed as a product from the ifeu, GEF and geomer project partners at variable spatial levels. The use of the waste heat cadastre is being checked. Aggregated results may possibly be published in order to comply with the privacy policies for the emission declarations.