Evaluation of the feasibility of a river water heat pump on the Spree as part of the decarbonization study of district heating with SenUVK.


  • Energy Infrastructure
  • Power & Electrical


BLS Energieplan GmbH




From 2018 to 2019

Project Activities

  • Potential determination of the water body at the site
  • Market analysis of available manufacturers and technologies
  • Technical feasibility & detailing of technical variants
  • Evaluation of the regulatory framework
  • Investment and operating cost estimation of the overall plant


BLS Energieplan GmbH

Berlin (Headquarters)
EUREF-Campus 12
D-10829 Berlin

Phone: +49 30 533281-0

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The study is a component of the feasibility study on "Coal phase-out and sustainable district heating supply Berlin 2030". It examines how the coal phase-out can be achieved by 2030 at the latest and how a CO2-free district heating supply can be achieved. Part of this analysis is the examination of the construction of a large-scale heat pump plant with river water at the Reuter/ Reuter West site. This includes the elaboration of the technical feasibility and regulatory framework of a heat pump plant of up to 90 MW useful thermal capacity. 


  • The use of river water heat from March to November possible (about 230 days a year). 
  • The days of the cold season are especially critical here. 
  • Technical operating limits are tightened by regulatory requirements. Direct use of the water is preferable to indirect use despite regulatory higher requirements. 
  • Heat exchangers in the water are not economically viable because the flow velocity is too low.