Analysis of perspective air preparation network designs in launch complex temperature control systems

Козлов, В. В.; Krylov, P.V.; Piskun, E.S.

doi:10.18698/2308-6033-2021-9-2111

Cited by 3 publications

(1 citation statement)

References 3 publications

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“…Так, в последние годы активно развиваются адсорбцион-ные технологии осушения воздуха и других газовых смесей с их предварительным сжатием [1][2][3][4][5][6], технологии обеспечения микроклимата в подземных и подводных объектах, биологических лабораториях и других помещениях с из-С быточным давлением [7,8]. Кроме того, определение характеристик сжатого влажного воздуха требуется при расчетах некоторых воздушных теплообменников, проектировании компрессорных станций, расчетах процессов сушки сжатым воздухом (холодная и горячая продувка) [9][10][11][12][13][14] и др.…”

Section: Introductionunclassified

Graphic Analytical Methods for Determining Moist Air Characteristics in Multistage Compressors

Didenko

Khvorenkov

Fakhraziev

2022

Vestnik IzhGTU imeni M.T. Kalashnikova

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The purpose of the study is a comparative analysis of methods for graphic analytical determination of the characteristics of moist air in multistage compressors. Two methods are compared, which differ in the used I-d-diagrams: unified in terms of pressure and atmospheric. I-d-diagrams unified in terms of pressure differ from atmospheric ones by diagrams of saturated air relative humidity () only at various pressures. For multistage compressors, curves are plotted on unified I-d-diagrams at atmospheric pressure and compressed air pressure in intercoolers and receivers. It is assumed that the isobaric cooling of compressed air and condensation of its water vapor occurs in coolers and receivers at the final compression pressure in the previous compressor stages. The method, which uses I-d-diagrams unified by pressure, involves the diagram plotting of air compression and cooling on a grid of curves. An example of plotting such diagrams for a two-stage compressor with an intercooler and a receiver is given. A detailed description of the thermodynamic state of moist air in such a compressor is given. The nodal points of the processes in the compressor are plotted on a pressure-unified I-d-diagram according to the known values of moisture content and air temperature. The pressure and temperature at the end points of compression are calculated by the equations of the polytropic process at n = 1.26. The dew points in the cooler and receiver are graphically defined as the intersection of the curves for the final compression pressures with the corresponding straight lines for constant air moisture content in the compressor stages. The technique using atmospheric (barometric) I-d-diagrams is used in the absence of unified I-d-diagrams suitable for pressure. The essence of the developed technique is to determine the curves on the atmospheric I-d-diagrams, graphically coinciding with the curves A numerical example of the application of such a technique is given. The advantages and disadvantages of both methods are evaluated.

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Section: Introductionunclassified

Graphic Analytical Methods for Determining Moist Air Characteristics in Multistage Compressors

Didenko

Khvorenkov

Fakhraziev

2022

Vestnik IzhGTU imeni M.T. Kalashnikova

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Modern trends in the development of membrane technologies and their application in launch complex thermostatic control systems

Barmin

Козлов

Krylov

et al. 2022

EJSI

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The purpose of the study was to conduct a comparative analysis of domestic selective property polymer membranes used in gas separation problems and to estimate the prospects of using appropriate membrane technologies for air drying in launch complex thermostatic control systems. The study analyzes models of membrane dryers through the example of a temperature control system with the required outlet dew point minus 25 °C under normal conditions. The existing methods of membrane drying with the corresponding designs of membrane modules and the most promising models for use at launch complexes are described. The scientific novelty of the work lies in the development of schematic diagrams of thermostatic control systems using cartridges with hollow fiber membranes, structurally adapted to solve the tasks at the launch rocket complex.

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Membrane and vapor compression technologies use in the two-stage dehumidifying scheme of the rocket launch complex thermal regulation system

Barmin

Козлов

Krylov

et al. 2023

EJSI

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Objective of this study is to perform analysis aimed at assessing the degree of reduction in energy consumption of the launch complex temperature regime air support system by introducing a two-stage dehumidifying unit that includes a vapor-compression refrigeration machine (VCRM) and membrane dryers in the scheme. As part of the study, a thermal regulation system with the required outlet dew point of –25 °C under normal conditions was considered, which was designed to ensure operation with a promising heavy-class launch vehicle. The paper describes the existing methods of membrane dehumidifying along with corresponding designs of the membrane modules, as well as the most promising models for use at the launch complexes. Scientific novelty of this work lies in developing schematic diagrams of the thermal regulation systems using both the principles of VCRM and hollow fiber membranes.

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Analysis of perspective air preparation network designs in launch complex temperature control systems

Cited by 3 publications

References 3 publications

Graphic Analytical Methods for Determining Moist Air Characteristics in Multistage Compressors

Graphic Analytical Methods for Determining Moist Air Characteristics in Multistage Compressors

Modern trends in the development of membrane technologies and their application in launch complex thermostatic control systems

Membrane and vapor compression technologies use in the two-stage dehumidifying scheme of the rocket launch complex thermal regulation system

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