- Tytuł:
- An investigation of the thermal characteristics of the refrigerants zeotropic mixtures condensation in minichannels
- Autorzy:
-
Bohdal, T.
Sikora, M.
Widomska, K. - Powiązania:
- https://bibliotekanauki.pl/articles/175244.pdf
- Data publikacji:
- 2015
- Wydawca:
- Polska Akademia Nauk. Czytelnia Czasopism PAN
- Tematy:
-
condensation
heat transfer coefficient
mass flux density
minichannels
vapor quality
zeotropic mixture - Opis:
- This paper describes the results of experimental investigations of heat transfer during the condensation of the homogenous R134a refrigerant and zeotropic mixtures R404A, R407C and R410A in pipe minichannels with internal diameters 0.31–3.30 mm. The values of the local and average heat transfer coefficient throughout the range of changes in the vapor quality 1–0 were determined. Based on the obtained results, the effect of vapor quality, mass flux density and channel diameter changes on heat transfer coefficient was illustrated. a pronounced effect of the refrigerant properties at the heat exchange efficiency during the condensation process in pipe minichannels was indicated. The results were compared with calculations according to the correlations proposed by other authors. On the basis of the experimental investigations, the authors proposed their own correlation for the calculation of local heat transfer coefficient, obtaining the results of compatibility tests in the range of ±20%.
- Źródło:
-
Transactions of the Institute of Fluid-Flow Machinery; 2015, 128; 43-57
0079-3205 - Pojawia się w:
- Transactions of the Institute of Fluid-Flow Machinery
- Dostawca treści:
- Biblioteka Nauki
Artykuł