Математическое Моделирование Рабочих Режимов Дефлегматора Абсорб-Ционного Водоаммиачного Холодильного Агрегата В Системах Получения Воды Из Атмосферного Воздуха С Использованием Солнечной Энергии

Improving the energy efficiency of solar systems for obtaining water from atmospheric air

“…We accept the following generally accepted assumptions in the study [37]: a) inertia forces, which arise in a condensate film, are negligible compared to forces of viscosity and gravity forces; b) convective heat transfer in a film, as well as thermal conductivity along it, are insignificant in comparison with thermal conductivity across a film; c) friction at the boundary between vapor and liquid phases is taken into account by means of tangential stress from the gas side; d) temperature of an external surface of a condensate film is constant; e) physical parameters of the reflux do not depend on temperature;…”

“…Input data for calculation: a) cooling capacity is 1,000 W; b) temperature (pressure) of boiling in an evaporator is 0°C (0.4 MPa); c) pressure in the generator is 1 MPa; d) ambient temperature is 32 °С; e) temperature of a vapor steam mixture at the inlet (outlet) into a refluxer is 100(40) °C; e) height of refluxer is 1.0 m. Evaluation of thermal and hydrodynamic parameters of a draining reflux flow based on model concepts [37], taking into account the above assumptions and initial data, showed their insignificant effect on integral modes of refluxer operation and therefore we do not take into account the presence of reflux in the subsequent model representation.…”

“…Evaluation of thermal and hydrodynamic parameters of a draining reflux flow [37] showed little effect on operating modes of a refluxer and we do not take into account the presence of reflux in a further model representation.…”