Research of thermal conditions over high-temperature gas-fired infrared emitters

Abstract

Abstract. The paper presents the study results of the thermal conditions in the area above high-temperature gas-fired infrared emitter. A number of bench tests and experiments were made on the basis of production facilities to control the distribution of temperatures above emitter in different heating system operating modes. Impact of the thermal characteristics in the area above high-temperature gas-fired infrared emitter on the heating system performance was estimated. Comparison of the bench tests results with existing experimental data has shown a good result convergence for both efficiency and accuracy. The obtained results can be used in the emitter development phase and in the construction phase of modern gasfired radiant heating systems.

Analysis of the construction of the high-temperature gas infrared radiator with the use of virtual prototyping

“…The graph in Figure 2 demonstrates a qualitative agreement in mechanisms of combustion initiation and the location of the kinetic combustion region between the virtual prototype of the gasfired infrared heat emitter and the experiment [1]. The numerical difference in the values of the temperatures at the entrance to the perforation of the ceramic nozzle is explained by the design and regime characteristics of the radiators [1,2]. Section A-A (see fig.…”

“…Calculation of radiant heat exchange was performed using the Discrete Ordinates radiation model. The validity of the selected mathematical models is confirmed by full-scale tests [1,2,6]. …”

“…Two acute tasks of energy resources saving and energy efficiency increasing can be achieved by replacing convective heating systems of production buildings, warehouses, large pavilions, hangars with radiant heating systems based on high-temperature gas infrared radiators [1,2]. Over many years of operation, high-temperature gas infrared radiators has proven itself as a reliable, energy-efficient and environmentally friendly source of converting fuel energy into thermal energy.…”

“…Over many years of operation, high-temperature gas infrared radiators has proven itself as a reliable, energy-efficient and environmentally friendly source of converting fuel energy into thermal energy. The conversion factor of such heating devices is 98% [1], but the fraction of the radiative heat flux transferred to the work zone by radiation is only 58-61% [2]. The rest of the heat energy is accounted for heat losses with outgoing gases (24-30%) and the casing of the radiator (9-18%).…”

“…The rest of the heat energy is accounted for heat losses with outgoing gases (24-30%) and the casing of the radiator (9-18%). The analysis of the high-temperature gas infrared radiators design aimed to improve the effectiveness of its work is an up-to-date practice [2].…”