Heat Exchanges Using Anisotropic-Porous Materials
More efficient heat-exchange equipment should be developed to save materials and energy. This paper deals with experimental study of the possibility to apply anisotropic porous materials (APM) in heat exchangers. Application of state-of-the-art technology allowed the authors to produce the goods from APM in the form of multi-bore tubes with lengthwise passages. The structures of heat exchangers that were manufactured using various cross-section profiles (round and rectangular cross-section) are offered from the elements of APM and can be used successfully in heat regenerators. The advantage of such surface as compared to finned pipes is uniformity of its washing and possibility of supply of heat carriers according to counter-flow diagram. To determine particular area of the most efficient application, the dependencies were obtained for calculation of heat transfer and aerodynamic resistance of heat exchangers made of APM with various geometric characteristics at different parameters of heat exchanging media. Based on obtained experimental data, the analysis is performed for heat engineering and aerodynamic properties and dependencies are obtained for heat transfer coefficient and aerodynamic resistance of the surface from APM at any values of geometric parameters of the elements and air flow in the cross section area. Comparison of power consumption coefficients per unit of the surface showed that the APM surfaces are more efficient than the ribbed pipes and can substitute them. The authors of the article showed the trends and basic lines for improvement in the efficiency and reliability of heat-exchange equipment applied in the oil and gas industry.