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The mix volatiles of biooil steam and noncondensable gases need to be separated by condenser in the consecutive apparatus. Relevant researches about water steam condensational effect with air or N2 were carried out by researchers both at home and abroad. It showed that non-condensable gases can distinctly affect condensational process by reducing local heat transfer coefficient. A system of condensational testing tube was built for pyrolysis volatiles at different temperatures. Volatiles of oiltea camellia produced at 400℃, 500℃ and 600℃ were tested in this system. As a result, local heat transfer coefficients decreased with the increase of condensational process. The values of volatiles at 400℃ were higher than those at 500℃ and 600℃, which showed that the increase of noncondensable gases decreased the heat transfer intensity of volatiles. When experimental data were simulated in Nusselt theoretical model and ffactor model, the result showed that compared with the Nusselt theoretical model, f factor model was more suitable for fitting experimental result of oiltea camellia volatiles produced at 500℃ with the error less than 20W/(m2·K). Exponential decay equations can fit the experimental data of volatiles at 400℃ and 500℃, which brought an assistant reference for biooil condenser design in consecutive pyrolysis apparatus.