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Experimental and numerical study of a flooded PV-T evaporator in a CO2 solar assisted heat pump.

Number: 0075

Author(s) : ZANETTI E., AZZOLIN M., CONTE R., GIROTTO S., DEL COL D.

Summary

In this work, a solar assisted heat pump working with CO2 as the refrigerant is presented. The heat pump produces hot water using solar radiation as the low-temperature heat source. Photovoltaic and thermal (PV-T) solar collectors are employed as the evaporator of the heat pump. This means that part of the incident solar radiation is converted into electrical power by the PV modules and part is converted into heat to evaporate the CO2. Furthermore, the refrigerant circuit has been designed to allow the evaporator to operate in flooded mode with natural or forced circulation. This configuration, compared to dry expansion, can be very efficient since it is possible to avoid maldistribution issues. The functioning of the heat pump with the PV-T evaporators operating in flooded configuration has been experimentally investigated. A distributed parameters numerical model of the collectors has been developed and validated. The model has been exploited to understand the main advantages and challenges of the presented system.

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Pages: 10 p.

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Details

  • Original title: Experimental and numerical study of a flooded PV-T evaporator in a CO2 solar assisted heat pump.
  • Record ID : 30029690
  • Languages: English
  • Subject: Technology
  • Source: 15th IIR-Gustav Lorentzen Conference on Natural Refrigerants (GL2022). Proceedings. Trondheim, Norway, June 13-15th 2022.
  • Publication date: 2022/06/13
  • DOI: http://dx.doi.org/10.18462/iir.gl2022.0075
  • Document available for consultation in the library of the IIR headquarters only.

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