• Kulwant Dhankar
• Krishna Diwvedi
• Hemant More
• Smita Ganjare
• Rohit Hankare

Abstract- In many industries, such as power generation, chemical production, transportation, microelectronics and air conditioning we are using conventional heat transfer fluids such as water, mineral oil and ethylene glycol. However, the heat transfer efficiency decreases because of their low thermal conductivities. It has been found by researchers that the heat transfer rates (efficiency) of these conventional fluids can be amplified (increased) by suspension of metallic nanoparticles. The suspended metallic nanoparticles can change the heat transfer characteristics of the base fluid. The nanoparticles used are Cu, Ag, Al2O3 and TiO2. Nowadays the experiments are conducted in concentric tube heat exchangers to study the heat transfer rates of Al2O3 -water nanofluids for variant flow rates. This review sum ups the development of nanofluids and gives the broad range of current and future applications in different fields like nuclear reactors, transportation, electrical energy, magnetic, mechanical, solar absorption and biomedical fields. However, there are some barricades and challenges that had been found in the industrial applications.

Microelectronics, Heat transfer fluids, Thermal conductivity, nanoparticles, base fluid, concentric tube heat exchangers.

"Review Paper on enhancement in heat transfer characteristics using Nanofluids", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.4, Issue 6, page no.254-258, July-2017, Available :http://www.jetir.org/papers/JETIR1706055.pdf

"Review Paper on enhancement in heat transfer characteristics using Nanofluids", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.4, Issue 6, page no. pp254-258, July-2017, Available at : http://www.jetir.org/papers/JETIR1706055.pdf