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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...
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...
Autorzy pracy przedstawili wyniki badań eksperymentalnych wymiany ciepła podczas skraplania jednorodnego czynnika chłodniczego R134a oraz mieszanin zeotropowych R404A, R407C i R410A w minikanałach rurowych o średnicy wewnętrznej d = 0,31+3,30 mm. Wyznaczono wartości lokalne i średnie współczynnika przejmowania ciepła a w całym zakresie zmiany stopnia suchości (x = 1+0). Na podstawie uzyskanych wyników...
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