利用CFD提高平板太阳能集热器内纳米流体流动的热效率

Q3 Engineering

Diagnostyka Pub Date : 2022-11-10 DOI:10.29354/diag/156384

Falah Zarda, A. Hussein, S. Danook, Barhm Mohamad

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引用次数: 2

摘要

平板太阳能集热器(FPSC)因其成本低、简单、易于安装和操作而广受欢迎。本文对FPSC的热性能进行了分析。它与金刚石/水纳米流体相比。对纳米颗粒的体积百分比和种类进行了数值分析，并与文献中的实验数据进行了验证。利用伊拉克炎热的气候来近似模型。利用ANSYS/FLUENT软件对问题进行了数值模拟研究。由于正午之后太阳强度减弱，气温下降。当纳米流体浓度为1%时，集热器热效率最高为68.90%，比纯水提高12.2%。由于物理性质的改变和热导率的增加，1%纳米流体的效率优于其他浓度。由于辐射强度影响太阳能集热器的出口温度，它们之间存在直接联系，这增加了太阳能集热器的效率，特别是在下午12:30左右达到最佳效率。

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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Enhancement of thermal efficiency of nanofluid flows in a flat solar collector using CFD

Flat plate solar collector (FPSC) is popular for their low cost, simplicity, and ease of installation and operation. In this work, FPSC thermal performance was analyzed. It's compared to diamond/H2O nanofluids. The volume percentage and kind of nanoparticles are analyzed numerically that validation with experimental data available in the literature. The hot climate of Iraq is employed to approximate the model. The numerical study is performed by using ANSYS/FLUENT software to simulate the case study of problem. Due to less solar intensity after midday, temperatures reduction. The greatest collector thermal efficiency is 68.90% with 1% ND/water nanofluid, a 12.2% increase over pure water. The efficiency of 1% nanofluid is better than other concentrations because of a change in physical properties and an increase in thermal conductivity. Since the intensity of radiation affects the outlet temperature from the solar collector and there is a direct link between them, this increases the efficiency of the solar collector, especially around 12:30 pm at the optimum efficiency.

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来源期刊

Diagnostyka Engineering-Mechanical Engineering

CiteScore

2.20

自引率

0.00%

发文量

期刊介绍： Diagnostyka – is a quarterly published by the Polish Society of Technical Diagnostics (PSTD). The journal “Diagnostyka” was established by the decision of the Presidium of Main Board of the Polish Society of Technical Diagnostics on August, 21st 2000 and replaced published since 1990 reference book of the PSTD named “Diagnosta”. In the years 2000-2003 there were issued annually two numbers of the journal, since 2004 “Diagnostyka” is issued as a quarterly. Research areas covered include: -theory of the technical diagnostics, -experimental diagnostic research of processes, objects and systems, -analytical, symptom and simulation models of technical objects, -algorithms, methods and devices for diagnosing, prognosis and genesis of condition of technical objects, -methods for detection, localization and identification of damages of technical objects, -artificial intelligence in diagnostics, neural nets, fuzzy systems, genetic algorithms, expert systems, -application of technical diagnostics, -diagnostic issues in mechanical and civil engineering, -medical and biological diagnostics with signal processing application, -structural health monitoring, -machines, -noise and vibration, -analysis of technical and civil systems.