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Indirect air-to-liquid heat exchanger design for refrigeration applications.

Number: 2440

Author(s) : TORRAS S., ABLANQUE N., RIGOLA J., OLIET C., VERA J., VILA J., MARTÍNEZ S.

Summary

During the last decade, the progressive phase-out of high GWP refrigerants has shifted the refrigerant options mainly towards natural or HFOs. However, recent information about the generation of forever chemicals (PFA/TFA) related to carbon-fluorine chemical bonds, is pointing towards a more restrictive scenario for HFOs. Under this situation, is of interest to investigate the most convenient secondary thermal fluid for cooling and freezing in indirect systems, aligned with the use of flammable/toxic natural refrigerants (HCs, NH3) on the primary side. The paper will devote the first section to present a study focused on the selection of the best fluid considering temperature limits, thermal properties, corrosion features, and range of application. After that and taking the selected fluids, the article will present the suggested design methodology for the fin-and-tube heat exchanger considered for the interaction with the conditioned environment. A combination of options changing the number of rows, columns, and circuits will allow to select the
best candidates, also incorporating cost-based goodness factors. The final designs and their comparison to the baseline heat exchanger used in direct expansion units will also shed some light on the impact of the refrigerant transition in this part of the system.

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Pages: 9 p.

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Details

  • Original title: Indirect air-to-liquid heat exchanger design for refrigeration applications.
  • Record ID : 30033123
  • Languages: English
  • Subject: Technology
  • Source: 2024 Purdue Conferences. 20th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2024/07/17

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