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EXPERIMENTAL RESEARCH ON THE HEAT TRANSFER CHARACTERISTICS OF NANOFLUIDS IN CRUDE OIL HEATING FURNACE

Yun Hao, Shaohua Lv, Song Wu
Frontiers in Heat and Mass Transfer (FHMT) 18 - 3 (2022)


Abstract


Traditional methods of enhancing the thermal efficiency of heating furnaces in continuously producing oilfields, such as replacing existing units with more efficient units or renovating old furnaces, are highly inconvenient. This paper investigates the use of nanofluids, a novel heat transfer medium with excellent heat transfer characteristics that can enhance the thermal efficiency of heating furnaces. The stable nanofluids (Al2O3-H2O, SiO2-H2O, and TiO2-H2O) were prepared by a two-step method and various heat treatments were carried out. Thermal conductivities of the nanofluids were measured using the transient hot-wire method, and based on the analysis, the most appropriate nanofluid was selected for further study. Field experiments were carried out in an oilfield in Xinjiang, China and the results show that the TiO2-H2O nanofluid (0.75%.wt) can increase the thermal conductivity by 5.38% compared to pure water. Furthermore, the thermal efficiency of the heating furnace was enhanced by 10.57% and fuel consumption of the heating furnace was reduced by 14.8 m3/day or 5400 m3/year. The findings reveal that nanofluids have the potential to improve the efficiency of heating furnaces with high fuel consumption rates in oilfield gathering and transportation systems.


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DOI: http://dx.doi.org/10.5098/hmt.18.3

ISSN: 2151-8629