Heat transfer analysis of a shell and tube heat exchanger operated with graphene nanofluids
| Autor: | Mohammed Al-Saad, Mohammad A. Al-Mayyahi, Mohammad N. Fares |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Fluid Flow and Transfer Processes
Thermal efficiency Materials science Convective heat transfer Graphene 020209 energy 02 engineering and technology Heat transfer coefficient 01 natural sciences 010406 physical chemistry 0104 chemical sciences law.invention Nanofluid lcsh:TA1-2040 law Heat transfer Heat exchanger 0202 electrical engineering electronic engineering information engineering Composite material lcsh:Engineering (General). Civil engineering (General) Engineering (miscellaneous) Shell and tube heat exchanger |
| Zdroj: | Case Studies in Thermal Engineering, Vol 18, Iss, Pp-(2020) |
| ISSN: | 2214-157X |
| DOI: | 10.1016/j.csite.2020.100584 |
| Popis: | Nanofluids have attracted huge attention because of their effective physical and thermal properties. One of many applications of nanofluids is the enhancement of the thermal performance of heat exchangers. In the current study, an experimental investigation has been conducted for studying the effects of graphene nanofluids on the convective heat transfer in a vertical shell and tube heat exchanger. Graphene flakes were prepared using graphite foam that is derived from sugar as a raw material. The prepared Graphene flakes have been characterized using scanning electron microscopy, X-ray diffraction, atomic force microscopy, and Raman spectroscopy. The graphene nanofluid has been used in the tube side of the heat exchanger to enhance its heat transfer performance. Different parameters such as nanofluids’ concentration, flow rate and inlet temperature were studied and their effects on heat transfer coefficient and thermal efficiencies are discussed. The results show that using of graphene/water nanofluids enhances the thermal performance of the vertical shell and tube heat exchanger. A maximum increase in the heat transfer coefficient of 29% was achieved using 0.2% graphene/water nanofluids. Furthermore, the mean thermal efficiency of the heat exchanger was enhanced by 13.7% by using graphene/water nanofluid. Keywords: Nanofluid, Graphene, Heat transfer, Energy effectiveness |
| Databáze: | OpenAIRE |
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