期刊
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
卷 146, 期 3, 页码 1297-1321出版社
SPRINGER
DOI: 10.1007/s10973-020-10066-6
关键词
Heat transfer; Heat exchanger; Turbulators; Nanofluid; Two-phase simulation
This paper aims to achieve a smaller and cheaper heat exchanger with similar performance, while studying the effects of using oil-based nanofluids in refinery heat exchangers. The results show that the usage of nanofluid and turbulators can significantly enhance the thermal-hydraulic performance of heat exchangers and reduce manufacturing costs.
The aim of this paper is to achieve a smaller and cheaper heat exchanger with similar performance. To fulfill this demand, ANSYS-Fluent software and Aspen-HYSYS software are employed. The second goal is to study the effects of using oil-based nanofluids in a refinery heat exchanger. To fulfill this demand, two different nanofluids (MgO-SAE10 and ZnO-SAE10) are studied using two-phase approaches. And the third objective of this paper is to compare the results which are obtained from the singe- and multi-phase approaches. The governing equations have been solved according to theEulerian-Euleriansingle-fluidTwo-Phase Model, with presumptuous that the coupling between phases is strong, and nanoparticles carefully follow the suspension flow. The FVM, SIMPLEC algorithm andk-epsilon turbulence model are applied. The thermal-hydraulic performance evaluation criteria, THPEC, andq '' have major roles. In the second step, the authors try to achieve an efficient model which not only has the THPEC > 1, but also has the maximum value ofq ''. According to the results, usage of nanofluid and turbulators can enhance thermal-hydraulic performances of heat exchanger significantly (between 84.78 and 105.31% for heat exchanger 1 and between 86.84% and 107.68% for heat exchanger 2). Furthermore, it is concluded that by employing nanofluid and turbulators the costs of manufacturing the refinery heat exchangers are sharply reduced.
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