聚光太阳能接收器的螺旋翅片:设计优化和熵分析

IF 2.6 3区 工程技术 Q3 ENERGY & FUELS
Bharath Pidaparthi, S. Missoum, Ben Xu, Peiwen Li
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引用次数: 0

摘要

具有热能存储(TES)的聚光太阳能发电(CSP)具有实现电网平价的潜力。这可以通过在高于700°C的温度下操作CSP系统来实现;C与高效sCO2功率循环。然而,在这样的温度下运行CSP系统带来了一些挑战,其中太阳能接收器的设计以适应增加的热负载是至关重要的。为此,本工作探索并优化了太阳能接收管的各种涡流诱导内翅片设计。这些翅片设计不仅提高了接收管的热性能,而且还消除了由不均匀热负载引起的温度不均匀。在这项工作中,对翅片设计的几何参数进行了优化,以在摩擦系数受到约束的情况下使努塞尔数最大化。然而,这种优化是计算密集型的,需要对计算流体动力学(CFD)模型进行数百次模拟调用。为了避免这个问题,使用代理模型来近似优化过程中所需的模拟输出。此外,本研究还从熵产生的角度考察了翅片的设计。为此,在改变操作雷诺数的同时,定量比较了热效应和粘性效应对熵的贡献。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Helical Fins for Concentrated Solar Receivers: Design Optimization and Entropy Analysis
Concentrated Solar Power (CSP) with Thermal Energy Storage (TES) has the potential to achieve grid parity. This can be realized by operating CSP systems at temperatures above 700 °C with high-efficiency sCO2 power cycles. However, Operating CSP systems at such temperatures pose several challenges, among which the design of solar receivers to accommodate increased thermal loads is critical. To this end, this work explores and optimizes various swirl-inducing internal fin designs for solar receiver tubes. These fin designs not only improve the thermal performance of receiver tubes but also levelize temperature unevenness caused by non-uniform thermal loading. In this work, the geometric parameters of the fin designs are optimized to maximize the Nusselt number with a constraint on the friction factor. This optimization, however, is computationally intensive, requiring hundreds of simulation calls to Computational Fluid Dynamics (CFD) models. To circumvent this problem, surrogate models are used to approximate the simulation outputs needed during the optimization. In addition, this study also examines the fin designs from an entropy generation perspective. To this end, the entropy contributions from thermal and viscous effects are quantitatively compared while varying the operational Reynolds number.
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来源期刊
CiteScore
6.40
自引率
30.00%
发文量
213
审稿时长
4.5 months
期刊介绍: Specific areas of importance including, but not limited to: Fundamentals of thermodynamics such as energy, entropy and exergy, laws of thermodynamics; Thermoeconomics; Alternative and renewable energy sources; Internal combustion engines; (Geo) thermal energy storage and conversion systems; Fundamental combustion of fuels; Energy resource recovery from biomass and solid wastes; Carbon capture; Land and offshore wells drilling; Production and reservoir engineering;, Economics of energy resource exploitation
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