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

Marcello Aprile, Rossano Scoccia, Alice Dénarié, Pál Kiss, Marcell Dombrovszky, Damian Gwerder, Philipp Schuetz, Peru Elguezabal and Beñat Arregi
Additional contact information
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

Energies, 2019, vol. 12, issue 3, 1-21

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.

Keywords: district heating; district cooling; heat pump; sewage; simulation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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