Condensation of Novec 649 refrigerant in pipe minichannels
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The paper presents the results of experimental investigation of Novec 649 refrigerant condensation in tube minichannels. This is a low-pressure refrigerant. This investigations are basis for flow structures visualization during condensation in pipe minichannels. The local and the average values of pressure drop (Δp/L) and heat transfer coefficient α in the whole range of the changes of vapour quality (x = 1 ÷ 0) were calculated. On the basis of the obtained test results there was illustrated the influence of the vapour quality x, the mass flux density G and the inner diameter of channel d changes on the studied parameters. These results were compared with the calculation results based on the dependencies of other authors.
2017 ◽
Vol 231
(7)
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pp. 666-675
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2017 ◽
Vol 25
(03)
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pp. 1750027
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2020 ◽
pp. 095765092097222
2020 ◽
Vol 17
(1)
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pp. 7675-7686
2009 ◽
Vol 36
(10)
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pp. 1036-1043
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