双管微型管式热交换器的能量和放能分析

IF 1.5 4区 工程技术 Q3 ENGINEERING, MECHANICAL
Kadir Gelis, Kadir Özbek, Taha Mermer
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引用次数: 0

摘要

全球人口的增长以及由此导致的能源资源的迅速枯竭,使能源资源的可持续性变得十分困难。通过缩小尺寸、减轻重量和降低成本,可以开发出更有效、更可持续的系统,并减少资源消耗。由于体积和表面效应因素,微型通道热交换器比大型通道热交换器能确保更高的热传递。此外,通过在基础传热流体中悬浮纳米级颗粒,可以提高热交换器的性能。本研究设计、制造了一种同心微型管热交换器,并进行了能量-能量分析。制备了不同体积浓度(0.1%-0.2%-0.3%)的 MWCNT-水纳米流体,并将其用作工作流体。使用ε-NTU 方法评估了同心微型管热交换器的传热性能。研究了ε、NTU、雷诺数和无量纲放能之间的关系。在 5 个不同的雷诺值(5000-25000)范围内,计算了水和以 3 种不同体积浓度制备的纳米流体的效率 (ε)、NTU 和无量纲放热量 (e) 值。结果发现,使用纳米流体作为工作流体会增加ε和 NTU 值,同时降低无量纲放热值。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
ENERGY AND EXERGY ANALYSIS OF DOUBLE PIPE MINI TUBE HEAT EXCHANGER
Global population growth and the resulting rapid depletion of energy resources make sustainability of energy resources difficult. By reducing size, weight, and costs, more effective and sustainable systems can be developed and resource consumption reduced. Mini-channel heat exchangers ensure higher heat transfer than macro-channel heat exchangers because of the volume and surface effect factor. Furthermore, the performance of heat exchangers can be increased by suspending nano-sized particles in the base heat transfer fluids. In this study, a concentric mini-tube heat exchanger was designed, manufactured and energy-exergy analyses were made. MWCNT-Water nanofluid prepared at various volume concentrations (0.1%-0.2%-0.3%) and used as a working fluid. The heat transfer performance of the concentric mini-tube heat exchanger was evaluated using the ε-NTU method. The relationship between ε, NTU, Reynolds number, and dimensionless exergy is investigated. Effectiveness (ε), NTU, and dimensionless exergy (e) values were calculated in the range of 5 different Reynolds values (5000-25000) for water and nanofluids prepared at 3 different volumetric concentrations. The use of nanofluids as a working fluid was found to increase the ε and NTU values while decreasing the dimensionless exergy value.
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来源期刊
Journal of Enhanced Heat Transfer
Journal of Enhanced Heat Transfer 工程技术-工程:机械
CiteScore
3.60
自引率
8.70%
发文量
51
审稿时长
12 months
期刊介绍: The Journal of Enhanced Heat Transfer will consider a wide range of scholarly papers related to the subject of "enhanced heat and mass transfer" in natural and forced convection of liquids and gases, boiling, condensation, radiative heat transfer. Areas of interest include: ■Specially configured surface geometries, electric or magnetic fields, and fluid additives - all aimed at enhancing heat transfer rates. Papers may include theoretical modeling, experimental techniques, experimental data, and/or application of enhanced heat transfer technology. ■The general topic of "high performance" heat transfer concepts or systems is also encouraged.
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