Analysis of thermophysical parameters of solar water desalination plant with an external camera

In this work, an analysis of the thermophysical processes taking place inside a specially designed chamber with a geometry different from other works was carried out. This process is designed in COMSOL Multiphysics software. Boundary conditions were investigated for ambient temperature of 293.15 K and solar radiation of 1000 W/m2. The process was taken as natural convection. In this case, the flow of air with high humidity inside the solar water heater was analyzed. It can be seen that the air temperature rises to 450 K. At the same time, the speed of moist air inside the chamber, heat flow and other thermophysical quantities were determined and analyzed

Studying the temperature regime of the heliopyrolysis device reactor

The article presents the principle of the heliopyrolysis device with a solar concentrator and the temperature measurement scheme at the characteristic points of the reactor. Pyrolysis of organic waste was carried out according to the experimental method in laboratory conditions. Experiments were carried out on samples of organic waste (rubber, polyethylene film, plastic bottle) with an initial moisture content of 5÷20% and a size of 4÷6 mm. Based on the relationship between the amount of solar radiation and the ambient temperature for the city of Karshi (Uzbekistan), the experimental results of studying the temperatures inside the heliopyrolysis reactor when various organic wastes are loaded are presented. 0.25h according to the height of the reactor in the experiment; 0.35h; 0.25h; temperatures on the inner surface at distances of 0.15 h were recorded using the Mobile-CASSY 2 thermometer. It was determined that an average temperature of 350÷450 °C can be generated in the reactor of the experimental device. Experiments show that in the conditions of the city of Karshi, it is possible to create a mode of 300÷500°C sufficient for the pyrolysis of organic waste through a parabolic solar concentrator in the daytime mode

Способы улучшения обработки воды и повышения энергетических характеристик теплового насоса типа «вода – воздух»

The subject matter of the paper is related to scientific-and-theoretical basis of power engineering characteristics of heat pump directly depending on the quality of treated water for reliable and uninterrupted operation of heat pump evaporator and compressor. On the basis of experimental data, energy parameters of the heat pump are calculated. The method of the combined technology of the heat pump “water – air” operation is considеred, the efficiency of which is based on the preliminary improvement of the quality of water softened with the use of a membrane ultrafiltration unit. This solution made it possible to reduce the load on the filters and to exclude the use of chemical reagents used in the classical schemes of water heating facilities. In order to improve the operation of the heat pump compressor, a method based on altering the speed of rotation of the shaft by means of electronic microprocessor devices has been proposed. To regulate the compressor performance, a frequency converter with a wide range of alternating current frequency is used. The intervals of alteration of frequency of the alternating current corresponding to energy-efficient values of coefficient of transformation of energy of the heat pump are investigated. The values of the energy conversion coefficient of the heat pump obtained in the course of experiments and determined by calculation are consistent within the experimental errors with the regulation of the compressor performance. The suggested experimental device made it possible to determine the dependence of the main characteristics of the unit of the heat pump unit on the number of revolutions of the compressor and to find out an effective range of its control (50–180 %). The development of advanced technologies for natural water treatment under conditions of increased anthropogenic loads on natural water sources is a priority one among the fundamental and applied research in the field of water treatment.Выполнено научно-теоретическое обоснование энергетических характеристик теплового насоса, напрямую зависящих от качества подготовленной воды, для надежной и бесперебойной работы испарителя теплового насоса и компрессора. На основе экспериментальных данных рассчитаны энергетические показатели теплового насоса. Рассмотрен способ комбинированной технологии работы теплового насоса типа «вода – воздух», эффективность которой основана на предварительном улучшении качества умягченной воды с помощью мембранной ультрафильтрационной установки. Такое решение позволило уменьшить нагрузку на фильтры и исключить использование химических реагентов, применяемых в классических схемах водоподогревательных установок. В целях усовершенствования работы компрессора теплового насоса предложен метод, основанный на изменении скорости вращения вала с помощью электронных микропроцессорных устройств. Для регулирования производительности компрессора использован частотный преобразователь, обладающий широким диапазоном изменения частоты переменного тока. Исследованы интервалы изменения частоты переменного тока, соответствующие энергоэффективным значениям коэффициента преобразования энергии теплового насоса. Полученные в ходе экспериментов и определенные расчетным путем значения коэффициента преобразования энергии теплового насоса согласуются между собой в пределах погрешностей эксперимента с регулированием производительности компрессора. Предложенная экспериментальная установка позволила определить зависимость основных характеристик блока теплонасосной установки от числа оборотов компрессора и найти эффективный диапазон его регулирования (50–180 %). Разработка усовершенствованных технологий для очистки природных вод в условиях повышенных антропогенных нагрузок на природные источники воды является приоритетной среди фундаментальных и прикладных исследований в области водоподготовки

Analysis of thermophysical parameters of solar water desalination plant with an external camera

In this work, an analysis of the thermophysical processes taking place inside a specially designed chamber with a geometry different from other works was carried out. This process is designed in COMSOL Multiphysics software. Boundary conditions were investigated for ambient temperature of 293.15 K and solar radiation of 1000 W/m2. The process was taken as natural convection. In this case, the flow of air with high humidity inside the solar water heater was analyzed. It can be seen that the air temperature rises to 450 K. At the same time, the speed of moist air inside the chamber, heat flow and other thermophysical quantities were determined and analyzed

Studying the temperature regime of the heliopyrolysis device reactor

The article presents the principle of the heliopyrolysis device with a solar concentrator and the temperature measurement scheme at the characteristic points of the reactor. Pyrolysis of organic waste was carried out according to the experimental method in laboratory conditions. Experiments were carried out on samples of organic waste (rubber, polyethylene film, plastic bottle) with an initial moisture content of 5÷20% and a size of 4÷6 mm. Based on the relationship between the amount of solar radiation and the ambient temperature for the city of Karshi (Uzbekistan), the experimental results of studying the temperatures inside the heliopyrolysis reactor when various organic wastes are loaded are presented. 0.25h according to the height of the reactor in the experiment; 0.35h; 0.25h; temperatures on the inner surface at distances of 0.15 h were recorded using the Mobile-CASSY 2 thermometer. It was determined that an average temperature of 350÷450 °C can be generated in the reactor of the experimental device. Experiments show that in the conditions of the city of Karshi, it is possible to create a mode of 300÷500°C sufficient for the pyrolysis of organic waste through a parabolic solar concentrator in the daytime mode

The Means to Improve Water Treatment and to Enhance Power Engineering Performance of the Water Source Heat Pump

The subject matter of the paper is related to scientific-and-theoretical basis of power engineering characteristics of heat pump directly depending on the quality of treated water for reliable and uninterrupted operation of heat pump evaporator and compressor. On the basis of experimental data, energy parameters of the heat pump are calculated. The method of the combined technology of the heat pump “water – air” operation is considеred, the efficiency of which is based on the preliminary improvement of the quality of water softened with the use of a membrane ultrafiltration unit. This solution made it possible to reduce the load on the filters and to exclude the use of chemical reagents used in the classical schemes of water heating facilities. In order to improve the operation of the heat pump compressor, a method based on altering the speed of rotation of the shaft by means of electronic microprocessor devices has been proposed. To regulate the compressor performance, a frequency converter with a wide range of alternating current frequency is used. The intervals of alteration of frequency of the alternating current corresponding to energy-efficient values of coefficient of transformation of energy of the heat pump are investigated. The values of the energy conversion coefficient of the heat pump obtained in the course of experiments and determined by calculation are consistent within the experimental errors with the regulation of the compressor performance. The suggested experimental device made it possible to determine the dependence of the main characteristics of the unit of the heat pump unit on the number of revolutions of the compressor and to find out an effective range of its control (50–180 %). The development of advanced technologies for natural water treatment under conditions of increased anthropogenic loads on natural water sources is a priority one among the fundamental and applied research in the field of water treatment