Micro heat exchangerCopyright: © KEmikro
Micro heat exchangers from the polymer polyvinylidenefluorid (PVDF) were fabricated at KEmikro by ultrasonic hot embossing and ultrasonic welding . First four PVDF foils, each 100 µm in thickness, were welded together and at the same time patterned with micro channels. In a following fabrication step, three foils with micro channels were welded onto a connection piece one by one.
Outer dimensions of the heat exchanger are 2 × 2 cm². It consists of three layers, each with 6 micro channels, each 400 µm in depth and 600 µm in width. In the middle layer there is flowing a liquid in counter flow to the two cover layers achieving a larger heat transfer.
 K. Burlage, C. Gerhardy, W.K. Schomburg
“PVDF micro heat exchanger manufactured by ultrasonic hot embossing and welding”
Proc. 21st MicroMechanics Europe Workshop, MME 2010 in Enschede, Niederlande, 25. - 27. September (2010) C09.