MUMBAI, India, Jan. 2 -- Intellectual Property India has published a patent application (202541123021 A) filed by Vellore Institute Of Technology, Vellore, Tamil Nadu, on Dec. 5, 2025, for 'method for enhancing thermal performance of double pipe heat exchangers using copper-graphene hybrid nanofluids.'
Inventor(s) include Dr. Aabid Hussain Shaik; and Mr. Ananda Aikat.
The application for the patent was published on Jan. 2, under issue no. 01/2026.
According to the abstract released by the Intellectual Property India: "The present disclosure provides a method (100) for enhancing thermal performance of double pipe heat exchangers using copper-graphene hybrid nanofluids. The method includes preparing Cu-Graphene hybrid nanofluids by dispersing copper nano powder at 0.04 vol% and varying graphene concentrations (0.01, 0.025, 0.05, 0.075 vol%) in water using magnetic stirring for 30 minutes followed by ultrasonication for 45 minutes (108), preparing a second set by dispersing graphene nanoplatelets at 0.04 vol% and varying copper concentrations using the same process (110), configuring a double pipe heat exchanger setup (116), conducting convective heat transfer experiments by circulating each nanofluid through the outer pipe in counter-current flow (120), calculating performance evaluation coefficient as ratio of Nusselt number enhancement to friction factor enhancement raised to power one-third (130), and identifying optimal concentrations (0.09 vol% and 0.115 vol%) demonstrating coefficient values of 1.04 to 1.21 (136)."
Disclaimer: Curated by HT Syndication.
