Analysis of enhanced pool boiling heat transfer on a copper foam surface with microchannels

Pool boiling heat transfer has numerous applications. This experiment investigates the effect of laser etching of polished copper and copper foam surfaces on pool boiling heat transfer of deionized water in this context. The laser-machined samples had the same width, depth, and different vertical microchannels. The results showed that when compared to the polish surface, the CHF and HTC both improved. At the same time, the laser etching copper foam surface had a much higher strengthening effect than the laser etching polish surface, and it performed better under low heat flux conditions. The CHF can be reinforced 3.71 times, while the HTC can be reinforced 5.28 times. The physical model of the same structure was also calculated with ANSYS, and the results were comparable to the experimental results. When compared to smooth or single structure surfaces, the composite structure demonstrated superior heat transfer performance of pool boiling.