Evaluation of the thermal efficiency of nanofluid flows in flat plate solar collector

IF 1.1 Q3 Engineering

Journal of Thermal Engineering Pub Date : 2024-01-02 DOI:10.18186/thermal.1448578

Adnan M. Hussein, Afrah Awad, Hussein Hayder Mohammed Ali

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Abstract

In this research, flat plate solar collectors (FPSC) were studied due to their simplicity, low maintenance, and cost-effectiveness. The study focused on comparing FPSC thermal performance using CuO/H2O nanofluids. Experiments were conducted over three months during the Iraqi weather conditions (January, February, and March) with carefully selected nanoparticle concentrations. Data was collected from 9 A.M. to 3 P.M., using various mass flow rates (ranging from 0.003 to 0.076 kg/s). Results showed a direct correlation between temperature and nanoparticle concentrations, with the highest outlet temperature (50°C) observed at 3 P.M. for 1% CuO-water nanofluid. Notably, at 1 P.M. in March, the 1% CuO-water nanofluid exhibited a 32% increase in collector thermal efficiency, surpassing pure water by 11.3%. This would improve the performance of FPSC by achieving higher efficiency increments. These improvements were attributed to the unique physical properties of nanoparticles, their increased surface area, and higher thermal conductivity. The study determined that the optimum nanofluid concentration for superior collector efficiency was 1%.

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评估平板太阳能集热器中纳米流体流的热效率

在这项研究中，由于平板太阳能集热器（FPSC）操作简单、维护成本低且具有成本效益，因此对其进行了研究。研究重点是比较使用 CuO/H2O 纳米流体的 FPSC 热性能。实验在伊拉克天气条件下（1 月、2 月和 3 月）进行，历时三个月，精心选择了纳米粒子的浓度。数据收集时间为上午 9 时至下午 3 时，采用不同的质量流量（0.003 至 0.076 千克/秒）。结果表明，温度与纳米粒子浓度之间存在直接关联，在下午 3 点时，1% 的氧化铜-水纳米流体的出口温度最高（50°C）。值得注意的是，在三月份的下午 1 点，1% CuO-水纳米流体的集热器热效率提高了 32%，比纯水高出 11.3%。这将通过实现更高的效率增量来改善 FPSC 的性能。这些改进归功于纳米颗粒独特的物理特性、增大的表面积和更高的热导率。研究确定，实现更高集热效率的最佳纳米流体浓度为 1%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Thermal Engineering THERMODYNAMICS-

CiteScore

2.40

自引率

18.20%

发文量

审稿时长

4 weeks

期刊介绍： Journal of Thermal Enginering is aimed at giving a recognized platform to students, researchers, research scholars, teachers, authors and other professionals in the field of research in Thermal Engineering subjects, to publish their original and current research work to a wide, international audience. In order to achieve this goal, we will have applied for SCI-Expanded Index in 2021 after having an Impact Factor in 2020. The aim of the journal, published on behalf of Yildiz Technical University in Istanbul-Turkey, is to not only include actual, original and applied studies prepared on the sciences of heat transfer and thermodynamics, and contribute to the literature of engineering sciences on the national and international areas but also help the development of Mechanical Engineering. Engineers and academicians from disciplines of Power Plant Engineering, Energy Engineering, Building Services Engineering, HVAC Engineering, Solar Engineering, Wind Engineering, Nanoengineering, surface engineering, thin film technologies, and Computer Aided Engineering will be expected to benefit from this journal’s outputs.