Article ID Journal Published Year Pages File Type
656793 International Journal of Heat and Mass Transfer 2015 6 Pages PDF
Abstract

The method of lifetime measurement is used to investigate the kinetics of spontaneous boiling-up of ethane–nitrogen solutions. Superheating temperatures Tn of solutions have been determined in experiments at pressure p = 1.0, 1.6 MPa and nitrogen concentration in ethane x = 0.5, 1.5 mol% in the nucleation rate range J = 1 × 104–2 × 108 s−1 m−3. At J > 3 × 106 s−1 m−3 one can observe a satisfactory agreement between experimental data and homogeneous nucleation theory with respect to the temperature dependence of the nucleation rate and a systematic disagreement in the superheating temperature. At x = 0.5 mol% attainable superheating temperatures achieved by experiment coincide within the experimental error with theoretical values, and at x = 1.5 mol% exceed them by approximately 1.7 K. It is shown that one possible reason of such “excess superheating” of a solution beyond the theoretical value of Tn may be the absence of adsorption equilibrium at the critical bubble–ambient solution interface.

Related Topics
Physical Sciences and Engineering Chemical Engineering Fluid Flow and Transfer Processes
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