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The combined potential of using air and solar source evaporators in a CO2 heat pump.
Number: 1209
Author(s) : CONTE R., ZANETTI E., TANCON M., GIROTTO S., AZZOLIN M., DEL COL D.
Summary
This research examines the potential of solar-air dual-source heat pumps with the simultaneous use of the heat source evaporators to enhance performance and overcome the limitations of single-source heat pumps. Traditional alternating operation between sources demands a proper control with dynamic monitoring, plus it does not yield in most cases the best performance. This paper presents an experimental study of a dual-source CO2 heat pump operating in three modes: air-mode (using a finned-coil evaporator), solar-mode (using a PV-T evaporator), and simultaneous-mode (using both evaporators simultaneously). Experimental data show that simultaneous-mode improves evaporation temperature and coefficient of performance (COP) compared to air-mode and solar-mode. A numerical model, validated with experimental results, is used to predict steady-state and dynamic performance under variable conditions. Simulation results indicate that simultaneous-mode generally outperforms solar-mode, except for high solar irradiance and low ambient temperature. Additionally, the impact of PV-T collector area and solar irradiance on heat pump performance is discussed.
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Details
- Original title: The combined potential of using air and solar source evaporators in a CO2 heat pump.
- Record ID : 30032721
- Languages: English
- Source: 16th IIR-Gustav Lorentzen Conference on Natural Refrigerants (GL2024). Proceedings. University of Maryland, College Park, Maryland, USA, August 11-14 2024
- Publication date: 2024/08
- DOI: http://dx.doi.org/10.18462/iir.gl2024.1209
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