HotCity—A Gamified Token System for Reporting Waste Heat Sources

Thomas Wernbacher, Alexander Pfeiffer, Ernst Gebetsroither-Geringer, Marko Göls, Jakob Worster, Ernst Meißner, Angelika Graf, Romana Stollnberger, Roman Geyer, Ralf-Roman Schmidt, Alesha Serada

Research output: Chapter in Book or Conference ProceedingsBook chapterpeer-review


Urban planning needs to discover and incorporate new energy sources to meet climate protection targets in the future. Waste heat from industrial and urban infrastructure has proven to be a viable solution, but its proper identification can be challenging, especially for smaller and unconventional sources. Our project relies on the principles of gamification enhanced by a blockchain based token system and crowdsourcing as methods to collect and utilise spatial data such as the location and the size of previously unused heat sources. The mobile platform-neutral HotCity App en ables users to collectively patrol the city in search of waste heat sources and to gain tokens that can be exchanged for rewards. The blockchain platform Ardor was used for cheat proofing and to enable transparency for the reward system. The field test conducted in winter 2020/2021 showed high usability scores as well as high acceptance ratings of our approach opening up new use case scenarios in the context of spatial energy planning.
Original languageEnglish
Title of host publicationDisruptive Technologies in Media, Arts and Design, Lecture Notes in Networks and Systems
EditorsAlexiei Dingli, Alexander Pfeiffer, Alesha Serada, Mark Bugeja, Stephen Bezzina
Number of pages13
ISBN (Print)978-3-030-93780-5
Publication statusPublished - 2022

Research Field

  • Integrated Digital Urban Planning


  • Blockchain
  • Blockchain game
  • Gamification
  • Energy saving
  • Crowdsourcing


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