Large Air-to-Water Heat Pumps for Fuel-Boiler Substitution in Non-Retrofitted Multi-Family Buildings—Energy Performance, CO 2 Savings, and Lessons Learned in Actual Conditions of Use

Omar Montero, Pauline Brischoux, Simon Callegari, Carolina Fraga, Matthias Rüetschi, Edouard Vionnet, Nicole Calame, Fabrice Rognon, Martin Patel and Pierre Hollmuller
Additional contact information
Omar Montero: 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
Pauline Brischoux: 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
Simon Callegari: 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
Carolina Fraga: Services Industriels de Genève, Chemin du Château-Bloch 2, 1219 Le Lignon, Switzerland
Matthias Rüetschi: Services Industriels de Genève, Chemin du Château-Bloch 2, 1219 Le Lignon, Switzerland
Edouard Vionnet: Services Industriels de Genève, Chemin du Château-Bloch 2, 1219 Le Lignon, Switzerland
Nicole Calame: CSD Ingénieurs SA, Avenue des Sports 14, 1400 Yverdon-les-Bains, Switzerland
Fabrice Rognon: CSD Ingénieurs SA, Avenue des Sports 14, 1400 Yverdon-les-Bains, Switzerland
Martin Patel: 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
Pierre Hollmuller: 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

Energies, 2022, vol. 15, issue 14, 1-29

Abstract: 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 m 2 ), 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 CO 2 savings (92% and 68%) and increased renewable energy share (75% and 43%), considering the hourly CO 2 content of the Swiss electricity mix.

Keywords: air to water heat pump; multi-family building; retrofit; monovalent and hybrid system; actual performance; in-situ monitoring (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: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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