Centralized Heat Supply System and Techniques of Planning Its Loads

Чичерин, Станислав; Glukhov, S. D.

doi:10.17673/vestnik.2017.03.22

Cited by 4 publications

(2 citation statements)

References 1 publication

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“…Система отопления здания предназначена для компенсации тепловых потерь помеще-ния в холодное время года [4][5][6][7]. Посредством отопительных приборов энергия теплоносителя, в качестве которого чаще всего используют воду, передается воздуху помещения…”

Section: Abstract: Mathematical Model Heating Radiator Structural Scheme Transmission Function Heating Systemunclassified

Mathematical Simulation of the Heating System Radiator of as a Control Object

Maslyanitsyn

Maslyanitsyna

Krasnova

2021

Urban construction and architecture

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The problem of mathematical modeling of a heating system radiator as a control object is considered. The purpose of its development is to create a generalized mathematical model of thermal processes in a room heated by means of water radiators. A calculation scheme of heat transfer processes between the heat carrier of the radiator and the air of the room has been developed, on the basis of which the heat balance equations are writt en. This takes into account both steady and unsteady heat transfer processes between the coolant, radiator and room air. A block diagram of the mathematical model of a heating radiator has been developed. After the introduction of assumptions and transformation of the structural diagram of the nonlinear model, the structural diagram of the linear mathematical model of the heating radiator was obtained. On its basis, the transfer function of the heating radiator is derived, the output coordinate of which is the thermal power. The resulting transfer function can be used in a generalized mathematical model of a heated room. The analysis of the transfer function of the heating radiator is carried out and it is shown that its dynamics is determined not only by geometric parameters, but also by the fl ow rate of the heat carrier.

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Section: Abstract: Mathematical Model Heating Radiator Structural Scheme Transmission Function Heating Systemunclassified

Mathematical Simulation of the Heating System Radiator of as a Control Object

Maslyanitsyn

Maslyanitsyna

Krasnova

2021

Urban construction and architecture

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“…Чаще всего исследования в области теплонасосных установок (ТНУ) направлены на конфигурирование вновь вводимых в строй систем [1][2][3][4][5] или на выполнение с точки зрения существующих преимущественно в странах Европы (Скандинавии) мощностей [6,7] в условиях неравномерного суточного [8] или изменяющегося в течение года [9] теплового потребления и нестабильной рыночной и политической конъюнктуры [10,11]. Приняты также и менее масштабные объекты исследования.…”

Section: Introductionunclassified

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

Джунусова¹,

Abildinova²,

Алиярова³

et al. 2018

Izv. vysh. ucheb

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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.

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Method of Aluminum Salts Extraction from Wastewater Using Desalination Technology: Syr Darya River Case Study1

Junussova

Чичерин

2019

IOP Conf. Ser.: Earth Environ. Sci.

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The Aral Sea Region is characterized by being a very demanding consumer of industrial wastewater treatment. We studied the effects of various pretreatment methods on aluminum production. This method can be used as an alternative one in industrial wastewater treatment. The aim of multi-year study is to explore a nanofiltration as a one of the most attractive technologies for this application since nanofiltration membranes can retain ions and small organic molecules from an aqueous solution. But it is also very challenging due to the presence of salts and operating problems such as fouling, salt deposition, etc. Result becomes available thank to experimental set-up based on an ion exchange and a reverse osmosis. Results are also verified by evaluation tests and field applications showing their usage and wastewater conversion efficiency. The technological scheme includes combined water treatment plant using desalination technology and additional block functioning for an aluminum production and a temporary storage. Aluminum is to be produced of the Syr Darya river rich of it with the help of cutting-edge technology of oxide film removal and cartridge packing. This work evaluates the use of aluminum accumulated in the reaction unit by means of aluminum powder plus water module to reduce the pollutant contents of industrial wastewater quickly and effectively. The invention makes it possible to reduce the cost of aluminum by 3-4 times. Energy consumption of the desalination process was also discussed. Extracted aluminum is a superior material for industry. The high activity of aluminum to water is prohibited by a thin layer of aluminum oxide on its surface. The water treatment system with a combined phase purification and desalination may contribute up to 50 per cent to meeting the reduction of energy consumption for end product (aluminum).

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Centralized Heat Supply System and Techniques of Planning Its Loads

Cited by 4 publications

References 1 publication

Mathematical Simulation of the Heating System Radiator of as a Control Object

Mathematical Simulation of the Heating System Radiator of as a Control Object

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

Method of Aluminum Salts Extraction from Wastewater Using Desalination Technology: Syr Darya River Case Study1

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