Оптимизация параметров теплообменной поверхности контактного пластинчатого воздухоподогревателя комбинированной теплоутилизационной системы котельной установки
Abstract
OPTIMIZATION OF PARAMETERS OF HEAT EXCHANGE SURFACE CONTACT REGIME PLATE AIR HEATERS
COMBINED SYSTEM HEAT RECOVERY
BOILER PLANT
А. Stepanova
The results of optimization of geometrical parameters of heat exchange surface of the contact plate air heater at different ambient temperatures are presented. Air heater is included in a combined heat recovery system boiler plant, which is designed to heat water and blow air. We analyzed the optimization algorithms used in the theory of design of experiments, and the possibility use for optimization of these parameters is demonstrated. Using statistical techniques of experimental design, which are necessary to optimize the functional dependencies for heat exergetic efficiency criterion of geometrical parameters of heat exchange surface of the heater were obtained.
It was shown that for equations, where in accordance with Student criteria, we can ignore second order members, it is reasonable the use an algorithm steep ascent of Box-Wilson. As an example, the dependence of the thermal exergy criterion ef ciency of the width, height and distance between the heat exchanger plates for t0 = 5 °C is considered. Using Box-Wilson algorithm to determine the optimum values of these parameters are obtained..
For a second order regression equations the investigations were carried out by the method of canonical transformations. This method allows the floor-chit graphical and analytical interpretation of the area of the optimum contours with a series of curves on the plane. The detailed analysis of the surface response function in the optimum using contour curves are obtained. Basing on the analysis exposed above, the technology-based change intervals of geometric parameters of heat exchange surface of the heat exchanger are determined.
References
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Термодинамическая оптимизация и анализ эффективности теплоутилизационных систем котельных агрегатов / Н. М. Фиалко, А. ?. Степанова, Г. А. Пресич [и др.] // Промышленная теплотехника. – 2012. – Т. 34, № 2. – С. 98–102.
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