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Investigation of shape‐optimized, non‐round tubes for CO2 gas coolers.

Number: 0146

Author(s) : TANCABEL J., AUTE V., LING J.

Summary

Heat exchangers (HXs) in carbon dioxide (CO2) refrigeration cycles operate under extremely high pressures (>8.0 MPa), and designing HXs which deliver the required thermal performance under such conditions is of utmost importance. Recent advancements in modeling and optimization allow designers to utilize primary heat transfer surface optimization to achieve compact, finless HXs which are smaller, lighter, and utilize less refrigerant than state‐of‐the‐art HXs. In this work, an optimization framework for HXs with non‐round, shapeoptimized tubes is utilized to design sCO2 gas coolers which outperform tube‐fin and microchannel baselines from literature without compromising tube‐level structural integrity. Preliminary results show that optimal HXs can deliver the required heat loads while achieving ~25% reduction in core envelope volume and ~37% reduction in core material volume. Tube shape comparisons for high pressure (e.g., sCO2) and low‐pressure
(e.g., R410A) fluids are presented to highlight how high‐pressure structural strength requirements affect optimal tube shape.

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Pages: 8 p.

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Details

  • Original title: Investigation of shape‐optimized, non‐round tubes for CO2 gas coolers.
  • Record ID : 30029740
  • Languages: English
  • Subject: Regulation
  • 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.gl2022.0146
  • Document available for consultation in the library of the IIR headquarters only.

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