American Journal of Technology and Applied Sciences ISSN (E): 2832-1766| Volume 19, December, 2023 P a g e | 72 www.americanjournal.org EXPERIMENTAL STUDY OF HEAT AGENT VELOCITY AND LOCAL RESISTANCE COEFFICIENTS IN HEAT EXCHANGE Madaminova Gulmirakhon Ikromaliyevna Fergana Polytechnic Institute, Fergana, Uzbekistan E-mail: g.madaminova@ferpi.uz, gmadaminova_87@mail.ru A B S T R A C T K E Y W O R D S In the article, the speed of heat agent and local resistance coefficients in the process of heat exchange in a drum dryer for drying mineral fertilizers were experimentally studied, and an experimental research program was carried out in order to determine the parameters determining the high intensity of heat exchange. Heat exchange, drum dryer, drying, U-shaped nozzle, heater, drying rate, ch injection speed, q is the coefficient of abundance. Introduction INTRODUCTION In the global chemical industry, scientific research is being carried out on the production of highly effective types of mineral fertilizers, on ensuring drying on the basis of high-quality and energy-saving technology.[15] In this regard, analysis of drying devices and modes, identification of problems; elimination of re-drying of a large part of the product by optimizing the granulometric composition of the product; Special attention is being paid to the experimental research of the effect of the construction and placement of the internal nozzles of the drying apparatus on the direction of movement of the product and thermal aerodynamics.[18] the same time , scientific and research work is being carried out on the improvement of technologies and machines for drying mineral fertilizers intended for food, chemical, cotton processing and related industries, which are compact, cheap and intended for export . 22] LITERATURE ANALYSIS AND METHODOLOGY to check the results of the theoretical studies and determine the parameters that determine the high intensity of heat exchange with low energy consumption using a two-part U-shaped tube for the drum dryer, the following activities were included in the experimental research program : − development and manufacture of laboratory equipment for conducting experimental studies; − study of the effect of material temperature depending on the types of slag; − Experimental study of heat agent speed and local resistance coefficients in a trolley drier ; − research of the hydraulic resistance of the drum equipped with a two-part U-shaped nozzle ; American Journal of Technology and Applied Sciences Volume 19, December 2023 P a g e | 73 www.americanjournal.org − study of the effect of the speed of the heat agent on the temperature of the material ; − study of the dependence of material temperature change on the number of drum revolutions ; − to study the dependence of the change of material moisture on the number of drum rotations and work efficiency .[25] RESULTS The following limits of variable factors for conducting studies, the slope of the material discharge part of the nozzle R = 15, 30 and 45 o , the number of heat exchange zones is 5, the number of nozzles in one row is 10 (nozzles are arranged in a checkerboard row according to zones b ), the speed of the heat agent (air) coming out of the radiator is y= 1.4÷14.2 m/s, the efficiency of the device Q unm = 0.18÷0.46 kg /s, the angle of inclination of the dryer drum relative to the plane a= 2.24gr adus (according to the technological regulations), [7] the frequency of rotations of the dryer drum was set n= 4 revolutions/min.[9-21]. The above variables were changed in sequence and the heat agent at the inlet and outlet of the drum speed values and consumption were determined experimentally. [19-24] Each experiment was repeated 5 times and arithmetic mean values were selected. Results of experiment 1.1; Tables 1.2 and 1.3. [22- 27]. Table 1. The slope in the material discharge part of the nas a dka When R =15 o No C a lorifer shiberi grade Access speed Output speed Resistance coefficient Product filling coefficient is 0.18 kg/s 1 90 o 14.2 4.23 3.35 2 75 o 10.55 3.16 3.33 3 60 o 7.15 2.12 3.37 4 45 o 5.62 1.72 3.29 5 30 o 2.60 0.77 3.35 6 15 o 1.40 0.41 3.36 Average 3.34 Product filling coefficient is 0.32 kg/s 1 90 o 14.2 4.04 3.51 2 75 o 10.55 3.02 3.49 3 60 o 7.15 2.01 3.56 4 45 o 5.62 1.59 3.52 5 30 o 2.60 0.73 3.54 6 15 o 1.40 0.39 3.53 The average is 3.52 Product filling coefficient is 0.46 kg/s 1 90 o 14.2 3.78) 3.75 2 75 o 10.55 2.83 3.72 3 60 o 7.15 1.91 3.74 4 45 o 5.62 1.51 3.75 5 30 o 2.60 0.69 3.73 6 15 o 1.40 0.37 3.76 The average is 3.74 American Journal of Technology and Applied Sciences Volume 19, December 2023 P a g e | 74 www.americanjournal.org Table 2. The slope in the material discharge part of the nas a dka When R = 30 o No C a lorifer shiberi grade Access speed Output speed Resistance coefficient Product filling coefficient is 0.18 kg/s 1 90 o 14.2 3.03 4.68 2 75 o 10.55 2.26 4.66 3 60 o 7.15 1.52 4.70 4 45 o 5.62 1.21 4.62 5 30 o 2.60 0.55 4.68 6 15 o 1.40 0. 30 4.67 Average 4.66 Product filling coefficient is 0.32 kg/s 1 90 o 14.2 2.93 4.84 2 75 o 10.55 2.18 4.82 3 60 o 7.15 1.46 4.89 4 45 o 5.62 1.15 4.85 5 30 o 2.60 0.53 4.87 6 15 o 1.40 0.28 4.86 Average 4.81 Product filling coefficient is 0.46 kg/s 1 90 o 14.2 2.79 5.08 2 75 o 10.55 2.08 5.05 3 60 o 7.15 1.41 5.07 4 45 o 5.62 1.10 5.09 5 30 o 2.60 0.51 5.06 6 15 o 1.40 0.27 5.08 Average 5.07 Table 3. The slope of the material discharge part of the nozzle When R = 45 o No C a lorifer shiberi grade Access speed Output speed Resistance coefficient Product filling coefficient is 0.18 kg/s 1 90 o 14.2 2.39 5.92 2 75 o 10.55 1.78 5.90 3 60 o 7.15 1.20 5.94 4 45 o 5.62 0.95 5.86 5 30 o 2.60 0.43 5.92 6 15 o 1.40 0.23 5.93 Average 5.91 Product filling coefficient is 0.32 kg/s 1 90 o 14.2 2.33 6.08 2 75 o 10.55 1.74 6.06 3 60 o 7.15 1.16 6.13 4 45 o 5.62 0.92 6.09 5 30 o 2.60 0.42 6.11 6 15 o 1.40 0.22 6.10 Average 6.09 Product filling coefficient is 0.46 kg/s 1 90 o 14.2 2.24 6.32 2 75 o 10.55 1.67 6.29 3 60 o 7.15 1.13 6.31 4 45 o 5.62 0.88 6.32 5 30 o 2.60 0.41 6.30 6 15 o 1.40 0.22 6.33 Average 6.31 American Journal of Technology and Applied Sciences Volume 19, December 2023 P a g e | 75 www.americanjournal.org In order to check the correctness of the conducted experiments, a graph of the dependence of the resistance coefficient on the performance was built ( Fig. 2 )[28-34]. 1st work productivity 0.18 kg/s; 2-work productivity 0.32 kg/s; 3-work productivity 0.46 kg/s; 2 . Dependence of the coefficient of resistance on performance. DISCUSSION Applying the least squares method to the conducted experiments, the following regression equations were obtained, and the correlation (R) errors were determined for each point of the graphical connections separately. [35-42]. From the obtained values, it seems that the experimental error did not exceed 5% .[29] 1st work productivity 0.18 kg/s; y = 1.4286x + 5.6462 (R² = 0.9967) (1) 2-work productivity 0.32 kg/s; y = 1.4643x + 4.3781 (R² = 0.9766) (2) 3-work productivity 0.46 kg/s; y = 1.4286x + 3.0762 (R² = 0.9967) (3) It can be seen from the given graph that the increase in the coefficient of filling the product to the drum leads to an increase in the coefficient of resistance in the apparatus [22] . 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