Experimental investigation of the effect of copper electrodeposition on the aluminum surface and addition of ethylene glycol on boiling heat transfer coefficient

• Published in: Heat and mass transfer 2022-05, Vol.58 (5), p.801-812
• Main Authors: Milani, Pouya Azadi, Mahdi, Miralam, Abarghooei, Arash
• Format: Article
• Language: English
• Subjects: Aluminum; Boiling; Copper; Distilled water; Engineering; Engineering Thermodynamics; Ethylene glycol; Heat and Mass Transfer; Heat flux; Heat transfer; Heat transfer coefficients; Industrial Chemistry/Chemical Engineering; Mathematical analysis; Original; Surface properties; Surface structure; Temperature; Thermodynamics; Working fluids
• ISSN: 0947-7411; 1432-1181
• DOI: 10.1007/s00231-021-03134-6

In this research, the effect of surface characteristics on boiling heat transfer has been investigated experimentally. For this purpose, a device with the ability to automatically record the liquid temperature of the inlet and outlet of the test area, calculate the coefficient of boiling heat transfer, and heat flux has been developed. The automatic temperature stability of the working fluid and the ability to investigate the effect of surfaces with different characteristics (in terms of material and surface structure) on the boiling heat transfer parameters are the most important features of this device. The performance of the experimental setup was evaluated by the modified "Chen" equation and the device was able to provide acceptable results. Investigating of the effect of fluid type and surface coating type on the boiling heat transfer coefficient of the flow has shown that adding ethylene glycol (antifreeze) to distilled water delays the onset of boiling by 10 to 20 degrees and it also halves the heat transfer coefficient compare to distilled water. On the other hand, coating the surface with copper particles let to an increase in heat transfer coefficient before boiling and an 80% improvement in heat transfer coefficient after boiling at the same temperatures.