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IIR document

Design optimization of microchannel heat exchangers with variable geometry for natural refrigerants.

Number: pap. ID21

Author(s) : HUANG L., AUTE V., RADERMACHER R.

Summary

Air-to-refrigerant microchannel heat exchangers (MCHXs) are now extensively used in stationary heat pumping applications. MCHXs with variable tubes, ports and fins have shown great material saving potential compared to the conventional uniform geometry designs. There is continued interest in natural working fluids such as carbon dioxide (CO2), due to various regulations on reduction in greenhouse gas emissions. In this paper, a validated variable geometry MCHX model is used to minimize the material cost and envelope volume of a R290 automotive MCHX condenser and a CO2 gas cooler. The preliminary optimization results show potential for 35 percent material reduction and 43 percent reduction in heat exchanger envelope volume for the same heat capacity. The presented results will help researchers and engineers in optimizing MCHXs for use with natural working fluids and other refrigerants.

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Pages: 8 p.

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Details

  • Original title: Design optimization of microchannel heat exchangers with variable geometry for natural refrigerants.
  • Record ID : 30012182
  • Languages: English
  • Source: 11th IIR Gustav Lorentzen Conference on Natural Refrigerants (GL2014). Proceedings. Hangzhou, China, August 31-September 2, 2014.
  • Publication date: 2014/08/02

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