Details

Autor(en) / Beteiligte

• An, Seongpil
• Kim, Do-Yeon
• Lee, Jong-Gun
• Jo, Hong Seok
• Kim, Min-woo
• Al-Deyab, Salem S.
• Choi, Jeehoon
• Yoon, Sam S.

Titel

Supersonically sprayed reduced graphene oxide film to enhance critical heat flux in pool boiling

Ist Teil von

• International journal of heat and mass transfer, 2016-07, Vol.98, p.124-130

Ort / Verlag

Elsevier Ltd

Erscheinungsjahr

2016

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• •Reduced graphene oxide (rGO) flakes were supersonically sprayed.•This surface modification enhanced the heat transfer.•The critical heat flux and the effective heat transfer coefficient increased.•The surface temperature of the heat source decreased during efficient heat.•The rGO film increased the cohesion of the cooling liquid with the heated surface. Reduced graphene oxide (rGO) flakes were supersonically sprayed onto a copper substrate, which was used to enhance the heat transfer between the cooling liquid and heat source in pool boiling. The results show that both the critical heat flux at which film bubbles are formed and the effective heat transfer coefficient increased substantially. The surface temperature of the heat source decreased substantially during efficient heat transfer. The higher wettability of the rGO film increased the cohesion of the cooling liquid with the heated surface. The roughened surface of the rGO film also facilitated the formation of small-scale bubbles that enhanced mixing and thus increased the rate of heat transfer. The rGO film was characterized using scanning electron microscopy, atomic force microscopy, and optical profiling.