Thermal performance augmentation in the cooling zone of brick tunnel kiln with two types of guide vanes

Natural Gas Intermittent Kiln for the Ceramic Industry: A Transient Thermal Analysis

“…It is worth noting that the response variable used to perform the mesh convergence analysis was the conduction energy gain by the thermal insulation during the kiln heating process (Q ininsu ). Such values were obtained by integrating the conduction heat gain from the initial time to the time when the heating was stopped (Equations (44) and (45)), which is represented by the area below the curves shown in Figure 16. The values of this variable for each mesh are reported in Table 5.…”

“…Figure 19 illustrates the conduction heat gain by the thermal insulation as a function of the heating time for three distinct time steps. Calculating the integral of the functions, according to Equations (44) and (45), we obtained the conduction energy gain by the thermal insulation during the kiln heating process (Q ininsu ). After choosing the numerical mesh appropriate to the process, a time step independence analysis for the same variable was performed.…”

“…Then, it is possible to propose alternatives to obtain better quality products, as well as to reduce processing the time and energy consumption. Several studies of thermal analysis in kilns can be found in the literature [32][33][34][35][36][37][38][39][40][41][42][43][44].Yu [32] developed a transient mathematical model for tunnel kilns. Using the model, the author was able to predict several parameters of the process, such as the temperature distribution in parts, energy consumption, heat losses, rate at which energy is accumulated, etc.…”

Artisan Brick Kilns: State-of-the-Art and Future Trends

“…Tunnel kilns are long structure kilns in which the green products are heated up in the preheating zone, and then to the sintering temperature, which is different from one product to another. After that, the product goes through the cooling zone, where it is cooled down to a temperature near the ambient temperature [58].…”

Simulation of the distribution of air flows and fuel combustion products in a channel of a tunnel kiln

“…And in [4][5][6], to reduce the unevenness of the heating of the brick cages, it is proposed to use highvelocity burners of the own development of the Gas Institute of the National Academy of Sciences of Ukraine for heating air in the low temperature zone. In [7][8][9], the method of mathematical modeling proved the improvement of heat transfer in the cooling zone of a tunnel kiln when changing the layout of a row of bricks, as well as when using guide vanes. The authors of the study [10] propose improving the temperature parameters of the operation of the tunnel kiln due to the turbine installation located in front of the kiln.…”