Nanofluids are just normal fluids with nanoparticles suspended in them. Nanofluids are a new kind of heat transfer coolant that have emerged as a result of recent advances in nanotechnology. The thermal characteristics of these fluids are bigger than those of traditional coolants. Since nanofluids provide fascinating new opportunities to improve heat transfer performance above pure liquids, they may be seen as the heat transfer fluids of the future. No such remarkable improvement is seen in particle-fluid suspensions with micrometer-sized particles. Conventional heat transfer fluids and fluids containing micro-sized metallic particles are anticipated to exhibit worse qualities when compared to nano fluids. The stability of the solution is enhanced and heat transmission capacities are substantially improved by using nanoparticles, which have a much greater relative surface area than regular particles.