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DX ammonia evaporators flow regimes and heat transfer.

Number: pap. n. 11

Author(s) : HRNJAK P.

Summary

This article discusses the heat transfer and pressure drop in evaporation of ammonia. An example of an experiment with DX evaporator is presented. The evaporator was equipped with partially transparent tubes so that visualization of the flow regimes and estimation of the void fraction was done in real application, with actual oil present in the system. Visualization indicated flow regimes like at a bit lower mass flus than Zürcher at al. would predict but reasonably close. The flow is characterized with very high void fraction. These flow regime visualizations indicated that any mechanism that would spread liquid to the walls would be extremely beneficial.

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Pages: 11 p.

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Details

  • Original title: DX ammonia evaporators flow regimes and heat transfer.
  • Record ID : 30007631
  • Languages: English
  • Source: 5th Conference on Ammonia Refrigeration Technology. Proceedings: Ohrid, North Macedonia, May 9-11, 2013.
  • Publication date: 2013/05/09

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