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Forced convection boiling in a stator–rotor–stator spinning disc reactor
Authors:M M de Beer  J T F Keurentjes  J C Schouten  J van der Schaaf
Affiliation:Laboratory of Chemical Reactor Engineering, Dept. of Chemical Engineering and Chemistry, Eindhoven University of Technology, Eindhoven, The Netherlands
Abstract:Boiling of a pure fluid inside the rotor–stator cavities of a stator–rotor–stator spinning disc reactor (srs‐SDR) is studied, as a function of rotational velocity ω, average temperature driving force urn:x-wiley:00011541:media:aic15274:aic15274-math-0001 and mass flow rate urn:x-wiley:00011541:media:aic15274:aic15274-math-0002. The average boiling heat transfer coefficient hb increases a factor 3 by increasing ω up to 105 rad s?1, independently of urn:x-wiley:00011541:media:aic15274:aic15274-math-0003 and urn:x-wiley:00011541:media:aic15274:aic15274-math-0004. The performance of the srs‐SDR, in terms of hb vs. specific energy input ?, is similar to tubular boiling, where pressure drop provides the energy input. The srs‐SDR enables operation at urn:x-wiley:00011541:media:aic15274:aic15274-math-0005 Wm urn:x-wiley:00011541:media:aic15274:aic15274-math-0006, yielding values of hb not practically obtainable in passive evaporators, due to prohibitively high pressure drops required. Since hb is increased independently of the superficial vapor velocity, hb is not a function of urn:x-wiley:00011541:media:aic15274:aic15274-math-0007 and the local vapor fraction. Therefore, the srs‐SDR enables a higher degree of control and flexibility of the boiling process, compared to passive flow boiling. © 2016 American Institute of Chemical Engineers AIChE J, 62: 3763–3773, 2016
Keywords:evaporation  spinning disc reactor  heat transfer  intensification
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