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Two-phase CO2 loop for thermal energy management in buildings: Concept and building energy performance improvement.

Number: 1117

Author(s) : ESLAMI-NEJAD P., BASTANI A.

Summary

Developing high performance buildings by integrating efficient end-use technologies and renewable energy can contribute to significant reductions of energy consumption and greenhouse gas emissions in the building sector. However, this is complex and requires an efficient thermal management of several sources and sinks in buildings. This paper presents a new refrigerant-based thermal energy loop to manage thermal energy at the building level. The system consists of a thermal loop with two-phase CO2 as heat carrier fluid through which all heating and cooling devices will exchange heat, regardless of their physical distance within the building. First, the paper explains a novel mechanism to circulate two-phase CO2 around the building for different load conditions. Then, lumped system analysis is carried out to show that the new concept can potentially reduce the building energy use for heating and cooling by more than 15% compared to a conventional central heat pump with an air distribution system.

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Two-phase CO2 loop for thermal energy management in buildings: Concept and building energy performance improvement

Pages: 6

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Details

  • Original title: Two-phase CO2 loop for thermal energy management in buildings: Concept and building energy performance improvement.
  • Record ID : 30027964
  • Languages: English
  • Subject: Technology
  • Source: 14th IIR-Gustav Lorentzen Conference on Natural Refrigerants (GL2020). Proceedings. Kyoto, Japon, December 7-9th 2020.
  • Publication date: 2020/12/07
  • DOI: http://dx.doi.org/10.18462/iir.gl.2020.1117

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