Synthesis and Enhancement of Thermal Conductivity of Surfactant Free MWCNTs-Jatropha Oil-based Nanofluid

Abstract

Thermal conductivity enhancement of multi-walled carbon nanotubes (MWCNTs) based nanofluids received the attention of many researchers due to its remarkable thermal properties. However, the synthesis of surfactant-free multi-walled carbon nanotubes based nanofluids with higher dispersion stability to maintain a trade-off between its dispersion stability and thermophysical properties is still a challenge. In this research, a surfactant-free multi-walled carbon nanotube and Jatropha seed oil-based nano-dispersion are prepared via one-step method and subjected to experimental determination of thermal conductivity within the temperature range of (25 °C - 65 °C) and nanoparticle volume fraction range of (0.2 wt.% - 0.8 wt.%). The prepared nanofluid found to be highly stable for long time and its thermal conductivity enhancement was found to be 6.76%.

Characterization of Copper Oxide–Jatropha Oil Nanofluid as a Secondary Refrigerant

“…Secondary refrigerant is a sustainable solution for reducing main refrigerant leakage in low-temperature multievaporator cooling applications such as hypermarkets. The use of a secondary loop refrigeration system, as shown in Figure 1, has two advantages: it saves primary refrigerant and prevents leakage [1][2][3]. Jatropha oil and copper oxide nanofluids have been utilized as secondary refrigerants for a long time [4].…”