Open Access

ARTICLE

Analysis of Air Exchange System Influence on Thermal and Concentration Modes in the Local Working Area under Radiant Heating Conditions

Boris Borisov, Geniy Kuznetsov, Vyacheslav Maksimov^*, Tatiana Nagornova, Felix Salikhov
School of Earth Sciences & Engineering, National Research Tomsk Polytechnic University, Tomsk, 634050, Russia
* Corresponding Author: Vyacheslav Maksimov. Email:
(This article belongs to the Special Issue: Heat and Mass Transfer in Energy Equipment)

Frontiers in Heat and Mass Transfer https://doi.org/10.32604/fhmt.2024.056758

Received 30 July 2024; Accepted 10 October 2024; Published online 31 October 2024

Abstract

One of the effective options for energy saving in terms of heat costs for the formation of routine thermal conditions of working areas of large-sized industrial premises is the replacement of traditional convective (water) heating systems with systems, the main part of which are gas infrared emitters. But the mass introduction of such systems based on emitters was held back until recently by the lack of scientific and technical foundations for ensuring not only the routine thermal conditions of local working areas, but also ensuring acceptable concentrations of carbon dioxide, which is formed during the operation of a gas emitter. Solving the latter problem by the method of experimental selection of heating and air exchange modes is practically impossible due to the multivariate nature of possible solutions to this problem. Therefore, the purpose of the work is to analyze the results of theoretical studies of the possibility of ensuring an acceptable level of carbon dioxide concentrations in local working areas during the operation of gas infrared emitters and an air exchange system. Numerical modeling of heat and mass transfer processes under such conditions was performed in a fairly wide range of the main significant factors: air flow rate in the air exchange system from 0.01 to 0.04 kg/s, the position of the air inlet and outlet channels relative to the radiator and the local workplace (height from 0.3 to 4.1 m). It was found that by varying the numerical values of these factors, it is possible to ensure carbon dioxide concentrations in the local working area within the permissible limits of up to 1400 ppm.

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Graphical Abstract

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Keywords

Gas infrared heater; air exchange system; local working areas; temperature fields; CO₂ concentration fields

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