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Recovery of Urban Excess Heat

Periodic Reporting for period 2 - ReUseHeat (Recovery of Urban Excess Heat)

Reporting period: 2019-04-01 to 2020-05-31

In cities, as a result of people working and living in them, heat is generated continuously. Recovering urban waste heat is increasingly interesting since urban areas are growing, Recovered urban waste heat can reduce the usage of the conventional fossil fuels making it a possible resource.

In Reuseheat, the main objective is to demonstrate first of their kind advanced, modular and replicable solutions enabling the recovery and reuse of waste heat available at the urban level from different sectors. The solutions promote a cost-effective and technically viable decarbonization of the current heating and cooling systems and unlock investments for the deployment of urban waste heat recovery across the EU. In the project, heat is recovered in four demosites.

Reuseheat also includes information on the urban waste heat potential in EU 28. Analyses are made of how increased usage of the heat sources in both national and urban energy systems would impact the systems. The heat potential and the technical solutions need to be combined to generate efficient business cases. In Reuseheat, the work of previous EU projects such as CELSIUS is continued. Analyses are made on the stakeholders perspectives, bankability, risk, contracts, business models and scalability, replicability and modularity of urban waste heat investments. Furthermore, to increase the implementation of urban waste heat recovery in the EU a handbook on how to undertake low temperature district heating investments is one of the main deliverables of the project. At the end of the project, the newly generated knowledge will be disseminated and actively supported by training sessions to increase the capacity of professionals in the heating sector to implement urban waste heat recovery.
Identification of urban waste heat potential, the impact of using it in national energy systems and locally is information that was collected and analyzed. An understanding of the risks related to urban waste heat recovery investments has been established and KPIs for the bankability of such investments have been derived. A first draft of contracts and business models for the demonstrators was realized. Effort was made to disseminate the results and the project has undertaken a shared event with Heat Roadmap 4 as well as arranged a workshop on urban waste heat recovery policy.

In terms of demonstration one demosite, the dashboard, has gone into validation. The datacenter heat recovery is prepared, the energy station and heat pump are ready to be commissioned but the heat recovery is delayed as a result of a slower scale up of the datacenter activity than foreseen. The hospital heat recovery is proceeding and the heat pump was aquired, in Madrid, the Covid 19 situation was particularly severe and had to be managed. The metro heat recovery is proceeding and is now in its third location (originally Bucharest, then Ernest Reuter Platz in Berlin and as a result of reconstruction in Ernest Reuter Platz now in Friedrichstrasse). The project had to manage a number of difficulties regarding the demosites and incurred delays. An amendment to mitigate the situation was submitted and accepted in M35 (August 2020) allowing the project to be extended by 12 months: a time frame that allows the foreseen work to be performed.

The main results are linked to work on heat potential and the usage of urban waste heat: information for importance to understand the scalability and scale up of the demosites. Also, important knowledge has been identified in regards to investments, contracts and business modelling in the urban waste heat context. Three papers have been published on this topic and the media outreach has been efficent with 18750 people identified. The demosites have needed management and a number of issues were settled allowing the project to remain with 4 demosites with a focus on recovering urban waste heat in the way outlined in the original proposal. Further, the project has managed the Covid 19 situation during Spring 2020. The first demosite to go into validation was the dashboard, it went into validation on April 1st, 2020.
Reuseheat is a forerunner in regards to urban waste heat recovery. There is limited empirical knowledge on how to recover low temperature heat into existing district heating networks and the four demosites of Reuseheat will provide important empirical information to progress in the field. In earlier EU projects on district heating little attention has been given to the business modelling, contracts and bankability of investments. In Reuseheat, the work made in EU project Celsius is continued and extended addressing the risk of urban waste heat recovery, contracts and business modelling. Bankablility analyses and stakeholder analyses addressing the urban waste heat recovery context are also performed that add knowledge beyond the state of the art. Reuseheat will summarize the new information, the state of the art generated in the project in one main deliverable: a handbook on urban waste heat recovery investments. The handbook will allow for trainings that increase the skills and qualifications of relevant stakeholders.

The main objective is to demonstrate at first of their kind advanced, modular and replicable solutions enabling the recovery and reuse of waste heat available at the urban level from different sectors. Apart from the main objective, the project has a number of scientifc and technical objectives. These objectives are linked to the technical and non-technical progression beyond state of the art (outlined in the section above). It is expected that the technical and non technical progression in Reuseheat will increase the overall urban waste heat awareness, skills and capabilities of district heating practitioners, owners of urban waste heat, customers, policy makers and investors in the field of green energy.

Reuseheat aims at the demonstration of waste heat recovery in urban areas, resulting in improved solutions compared to the best available solutions existing today. The project impacts are classified in several categories. These are (i) to increase the share of waste heat captured and utilized in urban areas, (ii) primary energy savings and (iii) GHG emission savings. At the end of the project, it is assumed that 4077 MWh/yr of urban waste heat will be recovered, 4305 MWh/yr of primary energy savings will be realized and that 888 tonnes of CO2/yr will be saved. Please note that these numbers have been updated to reflect amendment that was accepted in M35 (AMD 767429-37), the amendment was in progress in M32, the closing month for RP2.