<p>The integration of heat exchangers within the power plants is an essential component of energy technology, offering significant economic benefits. This study investigates the enhancement of heat transfer in a counterflow heat exchanger by utilizing fluid-structure interaction (FSI) techniques. Specific segments of the lower and upper plates of a plate heat exchanger, as well as the central plane of the exchanger, are regarded as elastic components. The elastic sections of both the upper and lower plates are subjected to a controlled vibration frequency. This study distinctly investigates the impact of elastic wall location, vibration frequency, and amplitude on the effectiveness of heat transfer by a thorough CFD methodology, compared to previous research. Five discrete cases are investigated, in which the positioning of the elastic components varies. The simulations results demonstrate a significant enhancement in heat transfer when the frequency applied to the elastic sections is increased. The observed improvement can be attributed to increased turbulence occurring in the proximity of the deformed elastic regions. Moreover, upon conducting a comparative analysis of the five cases, it is evident that case B, where the elastic wall positioned in the center of the heat exchanger, exhibits the highest heat transfer rate with a peak value of 22,599&#xa0;J/kg. This enhancement is mostly due to increased turbulence around the distorted elastic walls, which considerably increases the convective transfer of heat coefficient. The average Nusselt number in the heat exchanger rose from approximately 10 in Case C to approximately 13 in Case B, confirming the beneficial effect of elastic wall placements in improving heat transfer. This work incorporates elasticity into heat exchanger design, providing new insights into improving thermal efficiency by optimizing the arrangement, amplitude, and frequency of elastic plates within the heat exchanger.</p>