The analysis of thermal and flow characteristics of the condensation of refrigerant zeotropic mixtures in minichannels

• Autorzy: Bohdal T. , Widomska K. , Sikora M.

Identyfikatory

DOI

10.1515/aoter-2016-0012

• Języki publikacji: EN

Abstrakty

EN

The paper presents the results of experimental heat transfer and pressure drop during condensation of the single component refrigerant R134a and zeotropic mixtures R404A, R407C, and R410A in tube minichannels of internal diameter from the range 0.31–3.30 mm. The local values and the average of heat transfer coefficient and pressure drop in the whole range of the change in mass quality were measured. On the basis of the obtained test results there was illustrated the influence of the change of mass vapor quality, the mass flux density, and the inner diameter of channel on the studied parameters. These results were compared with the calculation results based on the relations postulated by other authors. The discrepancy range was ± 50%. On the basis of given test results own correlation was developed to calculate the heat transfer coefficient and pressure drop of tested refrigerants which presents the obtained results in a range of discrepancy of ±25%.

Słowa kluczowe

EN

minichannels; condensation; zeotropic mixture; heat transfer coefficient; pressure drop

PL

minikanał; kondensacja; mieszanina zeotropowa; współczynnik przewodnictwa cieplnego; spadek ciśnienia

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 2016
• Tom: Vol. 37, no. 2
• Strony: 41--69
• Opis fizyczny: Bibliogr. 33 poz., rys., wz.

Twórcy

autor

Bohdal T.

• Technical University of Koszalin, Department of Heat and Refigeration Engineering, Racławicka 15-17, 75-620 Koszalin, Poland

autor

Widomska K.

• Technical University of Koszalin, Department of Heat and Refigeration Engineering, Racławicka 15-17, 75-620 Koszalin, Poland

autor

Sikora M.

• Technical University of Koszalin, Department of Heat and Refigeration Engineering, Racławicka 15-17, 75-620 Koszalin, Poland

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