As part of the 16th National Installation Engineering Congress and TESKON SODEX 2025 Fair, technical sessions addressing current approaches in the sector attracted great interest from industry professionals.
At this congress, where innovative solutions and developments were shared, KARYER R&D Manager Gökhan Güngör gave a paper on “Numerical Analysis of Air-to-Air Heat Exchangers Used for Heat Recovery.” This paper, prepared as a result of joint studies with Boğaziçi University, aimed to compare experimental performance measurements and numerical analyses of a cross-flow heat exchanger featuring conical structures, in order to validate product accuracy and provide suggestions for design optimization.
To reduce the computational load that would come with modeling a full-scale product, systems with 3x2 and 3x3 flow channels were modeled. The findings from the analyses indicated that the 3x3 system yielded reasonably low error margins in CFD analyses. The study, conducted under both dry and humid air conditions, showed that the 3x3 system better reflected symmetry, whereas the 3x2 system exhibited unequal temperature changes.With the help of experimental data, simulations carried out using ANSYS Fluent were validated, and the most accurate model was determined to be the 3x3 system under humid air conditions. This demonstrated the capability to verify the performance of products with different plate lengths and spacing using CFD analysis methods.
The study concluded that by optimizing the number of plates and the spacing between them, thermal resistance could be reduced. It was also found that pressure drops could be considered in the optimization process, and that new and efficient designs could be achieved by altering the number, position, and dimensions of the conical structures.
At KARYER, we continue to add value to the industry through academic and R&D based efforts aimed at enhancing the performance of heat recovery systems used in ventilation, HVAC, automotive, energy systems, and industrial applications. With our efficiency-oriented approach, we not only support environmental sustainability but also strive to consistently offer our customers more innovative solutions.
