Printed Circuit Heat Exchangers (PCHE)

A Printed Circuit Heat Exchanger (PCHE) is one of the most compact and robust heat exchanger technologies available today. By using chemically etched microchannels and diffusion-bonded metal plates, PCHEs achieve extremely high heat transfer rates while occupying only a fraction of the space required by conventional heat exchangers. Their ability to withstand very high pressures and temperatures makes them increasingly important in emerging industries such as hydrogen, LNG, carbon capture, and advanced energy systems.

A PCHE is a compact heat exchanger constructed from thin metal plates into which microchannels are etched. These plates are stacked and diffusion bonded together, creating a solid metal core with no gaskets and virtually no internal welds. The flow passages inside a PCHE are typically between 0.5 and 2.0 mm in diameter, although specialized designs can feature channels as small as 30–100 microns (0.03–0.1 mm). These microchannels create highly turbulent flow, which significantly increases heat transfer efficiency compared to conventional exchanger designs. Depending on the design and materials used, PCHEs can operate under extreme conditions, including high pressures, cryogenic temperatures, and elevated process temperatures.

This combination of micro-scale flow passages, extreme mechanical strength, and high heat transfer density is what makes PCHE technology one of the most promising heat exchanger solutions for the energy transition and advanced process industries.