Theoretical substantiation choice of “comfortable” air temperature in industrial premises

Ulchiekov, Mikhail A.; Bulba, E.E.

doi:10.1051/matecconf/20179201032

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…for the corresponding surfaces and instances of heat exchange were described on the basis of heat exchange theories [8,9], taking into account the work of Academician M.A. Mikheyev [8] and other researchers [10], and also using data from the authors' physical experiments.…”

Section: Figmentioning

confidence: 99%

Mathematical simulation of thermal state of digital current and voltage transformer in unfavourable weather conditions

et al. 2018

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Abstract. This study examines issues relating to heat exchange between an innovative 6(10) kV current and voltage transformer (and its components) and its environment in unfavourable weather conditions. Existing designs of digital current and voltage transformers are featured in systems of commercial and technical electric power accounting, and also relay protection and automation. We have presented the results of mathematical simulation of the thermal state of both a single resistor included in our measuring device, and the digital transformer as a whole. Simulation was performed using the finite element method. We have taken into account the impact of such factors as direct and diffused solar radiation, high ambient temperatures and various voltage levels on the thermal state of the functioning equipment. To verify the developed mathematical model we have presented the results of a series of experiments conducted in a high-voltage environmental chamber. Our study conclusively shows that voltage, insolation and ambient temperature significantly affect the thermal state of a functioning current and voltage transformer.

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Section: Figmentioning

confidence: 99%

Mathematical simulation of thermal state of digital current and voltage transformer in unfavourable weather conditions

et al. 2018

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“…Cylindrical cyclone chambers are used as technological devices for burning, melting, drying, high-temperature reactions [1][2][3][4][5][6][7], they are used as dust concentrators in gas cleaning systems [8,9], in installations of dust removal of air of systems of aspirations [10,11]. Technical characteristics on devices are efficiency of dust removal of gases, coefficient of hydraulic resistance of the device which causes the capacity of the purified gas.…”

Section: Introductionmentioning

confidence: 99%

The characteristic and separation effects in a cylindrical cyclone dust collector

et al. 2017

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Physical simulation of heat exchange between 6(10) kV voltage instrument transformer and its environment with natural convection and insolation

et al. 2018

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This study examines the results of thermal tests on a 6(10) kV digital combined current and voltage transformer conducted in an environmental chamber. This measuring instrument consists of current and voltage transformers, featuring a resistive divider, and is used for commercial and technical electric power accounting. Ambient temperatures and levels of insolation on the transformer surface were set for the environmental chamber, with simulation of voltage transformer functioning in normal and emergency modes. We determined the time needed for the thermodynamic system to move to steady heat exchange mode, and also the final temperatures in the lower resistors and on the surface of the voltage transformer insulation cover. The results of our study have been used in developing algorithms for self-diagnostics of the thermal state of a digital combined transformer.

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Theoretical substantiation choice of “comfortable” air temperature in industrial premises

Abstract: In this paper solved the heat conduction problem for the system-the object of heat-insulation-environment (indoor air) considering natural convection. New variant substantiation of a choice the room temperature is proposed based on mathematical modelling.

Cited by 3 publications

References 7 publications

Mathematical simulation of thermal state of digital current and voltage transformer in unfavourable weather conditions

Mathematical simulation of thermal state of digital current and voltage transformer in unfavourable weather conditions

The characteristic and separation effects in a cylindrical cyclone dust collector

Physical simulation of heat exchange between 6(10) kV voltage instrument transformer and its environment with natural convection and insolation

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