Heat efficiency of staggered bundles with different forms of tubes
DOI:
https://doi.org/10.15587/1729-4061.2012.4612Keywords:
tube, flat-oval, bundle, effectiveness.Abstract
The article represents the results of comparison of the heating-aerodynamical effectiveness of bundles with flat-oval, teardrop and circular profiles of tubes. The methodology of thermal effectiveness estimation of different types of surfaces is based on the variant heating-aerodynamical calculations of specific heat exchange apparatus – economizer-utilizer, fixed next to the boiler and assigned to preheat return heating-system water by low-potential heat of exhaust gases. Conducted variant heating-aerodynamical calculations of water economizer for six bundles of tubes of different profiles showed relatively high heating-aerodynamical mass-overall characteristics of the surfaces of flat-oval tubes. It was determined that the main advantage of non-circular cross-section tubes in comparison with circular profile tubes is their low aerodynamic resistance. The results of this work can serve as a basis for further research connected with the dimensional optimization of tubes of given profile for different heat exchange equipment.References
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Copyright (c) 2014 Євген Миколайович Письменний, Вадим Анатолійович Кондратюк, Олександр Михайлович Терех, Олександр Ігоревич Руденко
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