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District Power-To-Heat/Cool Complemented by Sewage Heat Recovery

Author

Listed:
  • Marcello Aprile

    (Department of Energy, Politecnico di Milano, Via Lambruschini 4a, 20156 Milano, Italy)

  • Rossano Scoccia

    (Department of Energy, Politecnico di Milano, Via Lambruschini 4a, 20156 Milano, Italy)

  • Alice Dénarié

    (Department of Energy, Politecnico di Milano, Via Lambruschini 4a, 20156 Milano, Italy)

  • Pál Kiss

    (Thermowatt Ltd., Hűvösvölgyi street 20, 1021 Budapest, Hungary)

  • Marcell Dombrovszky

    (Thermowatt Ltd., Hűvösvölgyi street 20, 1021 Budapest, Hungary)

  • Damian Gwerder

    (School of Engineering and Architecture, Lucerne University of Applied Sciences and Arts, Technikumstrasse 21, 6048 Horw, Switzerland)

  • Philipp Schuetz

    (School of Engineering and Architecture, Lucerne University of Applied Sciences and Arts, Technikumstrasse 21, 6048 Horw, Switzerland)

  • Peru Elguezabal

    (Building Technologies Division, Tecnalia, Parque Tecnológico de Bizkaia, 48160 Derio, Spain)

  • Beñat Arregi

    (Building Technologies Division, Tecnalia, Parque Tecnológico de Bizkaia, 48160 Derio, Spain)

Abstract

District heating and cooling (DHC), when combined with waste or renewable energy sources, is an environmentally sound alternative to individual heating and cooling systems in buildings. In this work, the theoretical energy and economic performances of a DHC network complemented by compression heat pump and sewage heat exchanger are assessed through dynamic, year-round energy simulations. The proposed system comprises also a water storage and a PV plant. The study stems from the operational experience on a DHC network in Budapest, in which a new sewage heat recovery system is in place and provided the experimental base for assessing main operational parameters of the sewage heat exchanger, like effectiveness, parasitic energy consumption and impact of cleaning. The energy and economic potential is explored for a commercial district in Italy. It is found that the overall seasonal COP and EER are 3.10 and 3.64, while the seasonal COP and EER of the heat pump alone achieve 3.74 and 4.03, respectively. The economic feasibility is investigated by means of the levelized cost of heating and cooling (LCOHC). With an overall LCOHC between 79.1 and 89.9 €/MWh, the proposed system can be an attractive solution with respect to individual heat pumps.

Suggested Citation

  • Marcello Aprile & Rossano Scoccia & Alice Dénarié & Pál Kiss & Marcell Dombrovszky & Damian Gwerder & Philipp Schuetz & Peru Elguezabal & Beñat Arregi, 2019. "District Power-To-Heat/Cool Complemented by Sewage Heat Recovery," Energies, MDPI, vol. 12(3), pages 1-21, January.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:3:p:364-:d:200432
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    References listed on IDEAS

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    1. Averfalk, Helge & Ingvarsson, Paul & Persson, Urban & Gong, Mei & Werner, Sven, 2017. "Large heat pumps in Swedish district heating systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 79(C), pages 1275-1284.
    2. Lake, Andrew & Rezaie, Behanz & Beyerlein, Steven, 2017. "Review of district heating and cooling systems for a sustainable future," Renewable and Sustainable Energy Reviews, Elsevier, vol. 67(C), pages 417-425.
    3. Lund, Henrik & Werner, Sven & Wiltshire, Robin & Svendsen, Svend & Thorsen, Jan Eric & Hvelplund, Frede & Mathiesen, Brian Vad, 2014. "4th Generation District Heating (4GDH)," Energy, Elsevier, vol. 68(C), pages 1-11.
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    2. Nielsen, Tore Bach & Lund, Henrik & Østergaard, Poul Alberg & Duic, Neven & Mathiesen, Brian Vad, 2021. "Perspectives on energy efficiency and smart energy systems from the 5th SESAAU2019 conference," Energy, Elsevier, vol. 216(C).

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