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Heat and flow investigation of NOVEC649 refrigerant condensation in pipe minichannels

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  • Sikora, Małgorzata
  • Bohdal, Tadeusz

Abstract

This paper presents the experimental research results of Novec649. The refrigerant was condensed in 4 pipe minichannels with hydraulic diameters of dh = 2.5, 2.0, 1.2 and 0.5 mm. This refrigerant is a low-pressure fluid with an ODP = 0 and a GWP = 1. The aim of the study was to determine average and local values of the heat transfer coefficient α and the pressure drop (Δp/L) for the entire range of the vapour quality (x = 1 ÷ 0) of Novec649 in the pipe minichannels. The tests were carried out on a specially designed and built laboratory test stand, which was described in this paper. The influence of the mass flux density G, the vapour quality x and the internal channel diameter dh on the studied parameters was illustrated. These experimental results were compared with the calculation results based on the Bohdal et al. [1] correlations.

Suggested Citation

  • Sikora, Małgorzata & Bohdal, Tadeusz, 2020. "Heat and flow investigation of NOVEC649 refrigerant condensation in pipe minichannels," Energy, Elsevier, vol. 209(C).
    • Handle: RePEc:eee:energy:v:209:y:2020:i:c:s0360544220315553
    DOI: 10.1016/j.energy.2020.118447
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    Cited by:

    1. Maciej Masiukiewicz & Stanisław Anweiler, 2021. "Precise Evaluation of Gas–Liquid Two-Phase Flow Pattern in a Narrow Rectangular Channel with Stereology Method," Energies, MDPI, vol. 14(11), pages 1-16, May.

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