Priblizhennyy metod resheniya zadachi okhlazhdeniya kapel'noy vlagi v vakuumnoy gradirne

The systems of liquid vacuumevaporative cooling have a variety of advantages such as power efficiency, environment safety and high hygienic quality in comparison with conventional vaporcompression installations. Thanks to these advantages vacuumevaporative cooling became one of the most perspective trends in refrigeration engineering development. The paper analyzes the process of vacuumevaporative cooling of a liquid supplied into a vacuumizing space in the form of drops. An analytical dependence that allows defining the drops core and surface temperatures was obtained as well as the heat transfer parameter during vacuum impact on drops of supplied liquid was estimated. The test bench and the method of the experiment execution were described. The experimental data on dynamics of vacuumevaporative cooling of dropping liquid supplied under conditions of spray irrigation for a wide range of initial temperatures were obtained. The experimental data were compared with the results of a theoretical calculation using the model presented. The comparison allowed concluding the adequacy of theoretical research results. The results presented in the paper may be used when designing vacuumevaporative systems of dropping liquid cooling.

вакуумноиспарительное охлаждение, вода, капли, коэффициент теплоотдачи от воды, температура ядра капель, температура поверхности капель