A 3D-printed Plate Heat Exchanger (PHE) is an advanced heat transfer solution manufactured using additive manufacturing technologies, enabling the creation of highly complex and optimized internal geometries that are not possible with conventional fabrication methods. In this design, thin, corrugated plates or lattice-structured channels are produced layer-by-layer using materials such as stainless steel or advanced alloys, allowing precise control over flow paths, turbulence, and heat transfer efficiency. 3D printing enhances performance by enabling compact designs, reduced material usage, and improved thermal efficiency, while also supporting rapid prototyping and customization for specific industrial applications. These heat exchangers are particularly suitable for industries such as aerospace, energy, and high-performance engineering, where lightweight, compact, and high-efficiency thermal systems are critical