Heat and flow investigation of NOVEC649 refrigerant condensation in pipe minichannels

Małgorzata Sikora and Tadeusz Bohdal

Energy, 2020, vol. 209, issue C

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.

Keywords: Condensation; Minichannels; Novec649; Heat transfer; Pressure drop (search for similar items in EconPapers)
Date: 2020
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:209:y:2020:i:c:s0360544220315553

DOI: 10.1016/j.energy.2020.118447

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