Two-dimensional steady-state heat conduction problem for heat networks

Nemirovsky, Yu. V.; Mozgova, A S

doi:10.1088/1742-6596/1359/1/012138

Cited by 5 publications

(2 citation statements)

References 3 publications

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“…Not only transient condition that offers research areas, the IHCP under steady conditions also attracts the attention of researchers. Nemirovsky and Mozgova [38] used the boundary element method (BEM) in 2D problem to estimate both temperature and heat flux at the unknown boundary. Temperature measurement data were obtained by simulating direct problem equation.…”

Section: Introductionmentioning

confidence: 99%

Application of the Conjugate Gradient Method for Predicting Unknown Heat Flux in 2D Plat under Effect of Insulation

Ari Satmoko,

Engkos Achmad Kosasih,

Muhammad Irfan Dzaky

et al. 2023

ARFMTS

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When an anomaly is discovered during a thermal inspection of industrial equipment, the diagnosis of finding the heat source is made more difficult by the presence of heat insulation. The use of the Conjugate Gradient Method (CGM) to solve the unknown heat flux in Inverse Heat Conduction Problem (IHCP) under insulation condition has been discussed. This method is used to predict a heat flux by utilizing temperature data at any points of measurement. The study deals with the structure of 2D thin plate at steady state. A copper plate with a thickness of 1 mm is used as specimen. White glass wool is used to thermally insulate the plate on the back surface. An electrical heater is plate mounted and operated by varying the DC voltage. A datalogger with thermocouple sensors records plate temperature changes. Software for solving the IHCP based on the CGM was developed. Initially, the software was implemented using synthetic data obtained from the forward heat conduction equations with a known heat flux. Simulated measurement data are assumed to have high accuracy (± 0.1 ºC). Determination of heat flux with the CGM gives very satisfactory results with a low error below 0.12%. The CGM was then applied using experimental data. With a measurement error of ± 0.5 ºC, the computational stopping criterion can still be met satisfactorily. In real installations, equipment is sometimes partially or completely isolated. In the experiment, this phenomenon is simulated by varying the isolation area as follows: 0%, 25%, 50% and 100%. The results of the flux calculation are correlated with the real flux supplied by the electrical heater. Each type of insulation area has a similar curve. By obtaining the correlation equation, the equivalent heat flux from calculation to real and vice versa can be carried out.

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Section: Introductionmentioning

confidence: 99%

Application of the Conjugate Gradient Method for Predicting Unknown Heat Flux in 2D Plat under Effect of Insulation

Ari Satmoko,

Engkos Achmad Kosasih,

Muhammad Irfan Dzaky

et al. 2023

ARFMTS

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“…Since the pipelines have no thermal insulation, the heat losses are significantly higher than the normative values. [6][7][8][9][10] Energy efficiency and energy conservation represent an important aspect and are focused on activities such as reducing losses in heat and power generation. [11][12][13][14][15][16][17] The purpose of this paper is to determine the multiplication factor for the heat losses exceeding the normative values; to give recommendations for the reduction of heat losses in pipelines from recovery boilers.…”

Section: Introductionmentioning

confidence: 99%

Calculation of Heat Losses Through Non-Insulated Pipelines of a Waste-Heat Recovery System in a Thermal Power Plant

Mozgova

Terekhova

2022

IOP Conf. Ser.: Earth Environ. Sci.

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The paper considers the calculation of heat losses through a non-insulated pipeline section of a waste-heat recovery system in a thermal power plant. The waste-heat recovery system of a power generator includes two circuits from each unit and the network water pipelines. The first circuit of the waste-heat recovery system is the high-temperature cooling loop of the generator gas reciprocating engine. The first circuit extracts heat from the engine cooling jacket. The second circuit of the waste-heat recovery system consists of the engine exhausts heat recovery boiler, heat exchanger (heated side), network plate-type heat exchangers, and a pipeline system. In the second circuit, the heat of the first circuit and the heat of the exhausts in the heat recovery boiler is extracted. The recovery boiler pipeline with no thermal insulation is routed on the roof of the thermal power plant. The research objective was to determine the actual heat losses through the non-insulated pipeline section and to compare the obtained data with the regulatory one.

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Energy Survey of the Cogeneration Plant

Mozgova

Shchennikova

2022

Lecture Notes in Civil Engineering

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Two-dimensional steady-state heat conduction problem for heat networks

Cited by 5 publications

References 3 publications

Application of the Conjugate Gradient Method for Predicting Unknown Heat Flux in 2D Plat under Effect of Insulation

Application of the Conjugate Gradient Method for Predicting Unknown Heat Flux in 2D Plat under Effect of Insulation

Calculation of Heat Losses Through Non-Insulated Pipelines of a Waste-Heat Recovery System in a Thermal Power Plant

Energy Survey of the Cogeneration Plant

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