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Critical heat flux (CHF) experiments were performed to study the R134a CHF characteristics in horizontal helically-coiled tubes. The stainless steel test sections were heated uniformly, with tube inner diameters of 3.8–11mm, coil diameters of 135–370mm, helical pitches of 40–105mm and heated lengths of 0.85–7.54m. The experimental conditions are pressures of 0.30–1.10MPa, mass fluxes of 60–480kg m...
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