This counterflow water/water miniature heat exchanger was designed for and manufactured by Laser Beam Melting in order to demonstrate achievable efficiency compared to conventional plate heat exchangers.

The inlets with a diameter of  6mm fan out into 10 channels of 2 mm in diameter and a total length of 400 mm.

Each channel is meandering with 7 directional changes of 180°, having a distance of only 1.5 mm to each other. This leads to a very compact design while maximising the surface area.

Technical Details:

• AM-Technology used: Laser Beam Melting (LBM)


• Material: AlSi10Mg


• Dimensions: 60 x 60 x 60 mm³


• Weight: 0.5 kg


• Heat Transfer Surface Area: 505 cm²


• Heat Transfer Performance: 2kW (at 50°C / 26° C and
  2.1l / min)