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<p>Presently, the performance of a heat exchanger for three fluids (HETF) used in a residential heating system is assessed experimentally. The influence of input parameters such as flow rate and volume fraction of nanofluids, diameter of the helical tube and innermost tube on the shell-side Nusselt number (<i>Nu_nf</i>), shell-side friction factor (<i>f_nf</i>), entropy generation number (<i>N</i><sub>s</sub>), and depletion number (<i>DN</i>) are assessed. A response surface methodology (RSM) model corresponding to HETF performance is developed using Box–Behnken design, and the model competence was verified using ANOVA. The maximum <i>Nu_nf</i> and the minimum <i>f_nf</i>, Ns, and <i>DN</i> are 126.47, 0.0037, 0.02, and 0.13, respectively, and are determined as the optimized performance of the HETF with a composite desirability of 0.93. A techno-economic analysis was conducted for the residential heating systems at two different places, and substantial increment in the benefit–cost ratio is observed by &#xa0;90% and &#xa0;92.3%, respectively.</p>

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Performance of a heat exchanger for three fluids with graphene–water-based nanofluid used in a sustainable residential heating system: an optimization and techno-economic assessment

  • 期刊论文

  • 发表日期：

    2025年3月11日

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  • Vikas Bargah,
  • Sudhansu S. Mishra,
  • Belal Almasri,
  • Taraprasad Mohapatra

摘要

Presently, the performance of a heat exchanger for three fluids (HETF) used in a residential heating system is assessed experimentally. The influence of input parameters such as flow rate and volume fraction of nanofluids, diameter of the helical tube and innermost tube on the shell-side Nusselt number (Nu_nf), shell-side friction factor (f_nf), entropy generation number (Ns), and depletion number (DN) are assessed. A response surface methodology (RSM) model corresponding to HETF performance is developed using Box–Behnken design, and the model competence was verified using ANOVA. The maximum Nu_nf and the minimum f_nf, Ns, and DN are 126.47, 0.0037, 0.02, and 0.13, respectively, and are determined as the optimized performance of the HETF with a composite desirability of 0.93. A techno-economic analysis was conducted for the residential heating systems at two different places, and substantial increment in the benefit–cost ratio is observed by  90% and  92.3%, respectively.