LAPSE:2023.11672
Published Article
LAPSE:2023.11672
Large Air-to-Water Heat Pumps for Fuel-Boiler Substitution in Non-Retrofitted Multi-Family Buildings—Energy Performance, CO2 Savings, and Lessons Learned in Actual Conditions of Use
February 27, 2023
The use of air source heat pumps (ASHP) in the specific context of existing multi-family buildings (MFB) represents an important challenge, especially in terms of performance and technical constraints in real conditions of use. This study concerns the actual performance of two non-retrofitted MFB (4047 and 7563 m2), whose original fossil heat supply was replaced by a centralized monovalent (2 × 156 kW) and hybrid (6 × 34 kW) ASHP system for space heating and domestic hot water. Based on a detailed monitoring campaign covering two years of operation, it can be concluded that both systems are able to supply the required temperature and cover the entire heat demand. By closely following up these pilot projects, constraints linked to integration and operation were identified. Optimization measures allowed us to increase the COP of the monovalent system (from 1.3 up to 3.4, with an optimized SPF of 2.3) and to raise the HP share of the hybrid system (from 50% to 67%, with an optimized SPF of 2.3). Both systems offer major progress in terms of CO2 savings (92% and 68%) and increased renewable energy share (75% and 43%), considering the hourly CO2 content of the Swiss electricity mix.
Record ID
Keywords
actual performance, air to water heat pump, in-situ monitoring, monovalent and hybrid system, multi-family building, retrofit
Subject
Suggested Citation
Montero O, Brischoux P, Callegari S, Fraga C, Rüetschi M, Vionnet E, Calame N, Rognon F, Patel M, Hollmuller P. Large Air-to-Water Heat Pumps for Fuel-Boiler Substitution in Non-Retrofitted Multi-Family Buildings—Energy Performance, CO2 Savings, and Lessons Learned in Actual Conditions of Use. (2023). LAPSE:2023.11672
Author Affiliations
Montero O: Energy Systems Group, Section of Earth and Environmental Sciences, Department F.-A. Forel for Environmental and Aquatic Sciences & Institute for Environmental Sciences, Uni Carl Vogt, University of Geneva, 1211 Geneva, Switzerland [ORCID]
Brischoux P: Energy Systems Group, Section of Earth and Environmental Sciences, Department F.-A. Forel for Environmental and Aquatic Sciences & Institute for Environmental Sciences, Uni Carl Vogt, University of Geneva, 1211 Geneva, Switzerland [ORCID]
Callegari S: Energy Systems Group, Section of Earth and Environmental Sciences, Department F.-A. Forel for Environmental and Aquatic Sciences & Institute for Environmental Sciences, Uni Carl Vogt, University of Geneva, 1211 Geneva, Switzerland
Fraga C: Services Industriels de Genève, Chemin du Château-Bloch 2, 1219 Le Lignon, Switzerland
Rüetschi M: Services Industriels de Genève, Chemin du Château-Bloch 2, 1219 Le Lignon, Switzerland
Vionnet E: Services Industriels de Genève, Chemin du Château-Bloch 2, 1219 Le Lignon, Switzerland
Calame N: CSD Ingénieurs SA, Avenue des Sports 14, 1400 Yverdon-les-Bains, Switzerland
Rognon F: CSD Ingénieurs SA, Avenue des Sports 14, 1400 Yverdon-les-Bains, Switzerland
Patel M: Energy Systems Group, Section of Earth and Environmental Sciences, Department F.-A. Forel for Environmental and Aquatic Sciences & Institute for Environmental Sciences, Uni Carl Vogt, University of Geneva, 1211 Geneva, Switzerland
Hollmuller P: Energy Systems Group, Section of Earth and Environmental Sciences, Department F.-A. Forel for Environmental and Aquatic Sciences & Institute for Environmental Sciences, Uni Carl Vogt, University of Geneva, 1211 Geneva, Switzerland
Brischoux P: Energy Systems Group, Section of Earth and Environmental Sciences, Department F.-A. Forel for Environmental and Aquatic Sciences & Institute for Environmental Sciences, Uni Carl Vogt, University of Geneva, 1211 Geneva, Switzerland [ORCID]
Callegari S: Energy Systems Group, Section of Earth and Environmental Sciences, Department F.-A. Forel for Environmental and Aquatic Sciences & Institute for Environmental Sciences, Uni Carl Vogt, University of Geneva, 1211 Geneva, Switzerland
Fraga C: Services Industriels de Genève, Chemin du Château-Bloch 2, 1219 Le Lignon, Switzerland
Rüetschi M: Services Industriels de Genève, Chemin du Château-Bloch 2, 1219 Le Lignon, Switzerland
Vionnet E: Services Industriels de Genève, Chemin du Château-Bloch 2, 1219 Le Lignon, Switzerland
Calame N: CSD Ingénieurs SA, Avenue des Sports 14, 1400 Yverdon-les-Bains, Switzerland
Rognon F: CSD Ingénieurs SA, Avenue des Sports 14, 1400 Yverdon-les-Bains, Switzerland
Patel M: Energy Systems Group, Section of Earth and Environmental Sciences, Department F.-A. Forel for Environmental and Aquatic Sciences & Institute for Environmental Sciences, Uni Carl Vogt, University of Geneva, 1211 Geneva, Switzerland
Hollmuller P: Energy Systems Group, Section of Earth and Environmental Sciences, Department F.-A. Forel for Environmental and Aquatic Sciences & Institute for Environmental Sciences, Uni Carl Vogt, University of Geneva, 1211 Geneva, Switzerland
Journal Name
Energies
Volume
15
Issue
14
First Page
5033
Year
2022
Publication Date
2022-07-10
Published Version
ISSN
1996-1073
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Original Submission
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PII: en15145033, Publication Type: Journal Article
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LAPSE:2023.11672
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doi:10.3390/en15145033
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Feb 27, 2023
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