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System simulation of residential simultaneous space conditioning and water heating using CO2.

Author(s) : RAJAN J. K., BULLARD C. W.

Summary

The high heat rejection temperature of the transcritical CO2 cycle creates opportunities for meeting domestic water heating needs in addition to space heating and air conditioning. This paper presents a complete analysis of a residential CO2 space conditioning and water heating system design, across a wide ambient temperature range. The system simulation analysis builds upon a previous design study where a thermodynamic cycle analysis identified an optimal configuration where the water heater is placed downstream of the compressor before the refrigerant enters the gas cooler. The indoor and outdoor coils are cross-counterflow finned tube heat exchanger designs, and the water heater and internal heat exchanger are three-layer microchannel sandwich designs that can be rolled up in a scroll to save space. The geometric dimensions for each heat exchanger were optimized at separate ambient design conditions.

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Pages: 2006-2

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Details

  • Original title: System simulation of residential simultaneous space conditioning and water heating using CO2.
  • Record ID : 2007-1694
  • Languages: English
  • Subject: Technology
  • Source: 7th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2006). Proceedings
  • Publication date: 2006/05/29

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