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首页> 外文期刊>Energy Conversion & Management >Thermoelectric-hydraulic performance of a multistage integrated thermoelectric power generator
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Thermoelectric-hydraulic performance of a multistage integrated thermoelectric power generator

机译：多级集成热电发电机的热电液压性能

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摘要

A thermoelectric element made of p- and n-type semiconductor plates bonded onto a highly thermal and electrical conducting inter-connector material with an integrated flow channel can be treated as an integrated thermoelectric device (iTED). The performance of an iTED with multiple elements connected electrically in series and thermally in parallel has been investigated using numerical simulations. The top and bottom surfaces of the device are subjected to a constant cold temperature while the inter-connector channel walls are exposed to a hot fluid. The thermoelectric-hydraulic behavior of an iTED is analyzed in terms of heat input, power output, conversion efficiency, produced electric current, Ohmic and Seebeck voltages, and pressure drops for various hot fluid flow rates Re and inlet temperatures T_(in), thermoelectric material sizes d, and number of modules N. For a single module iTED with fixed d and T_(in) values, the power output and efficiency are increased five- and twofold, respectively at Re = 500 when compared with the values of Re = 100. For given Re and d values, increasing T_(in) resulted in enhanced device performance. Furthermore, increasing d increased internal resistance and resulted in a decrease of heat input. The influence of d on power output is phenomenal; for a given set of geometric and thermal boundary conditions, there exists an optimum d where a maximum power output is achieved. The addition of modules N resulted in a significant improvement in power output and a reduction in produced electric current and efficiency. For instance, device with N = 5 showed more than a twofold increase in power output and nearly a 33% reduction in both efficiency and electric current when compared to N = 1 values.
机译：可以将由p型和n型半导体板制成的热电元件结合到具有集成流动通道的高导热和导电互连件材料上，将其视为集成热电设备（iTED）。使用数值模拟研究了具有多个串联电并联和热并联元件的iTED的性能。装置的顶面和底面要经受恒定的低温，而互连器的通道壁要暴露于热流体中。根据热输入，功率输出，转换效率，产生的电流，欧姆和塞贝克电压以及各种热流体流量Re和入口温度T_（in）的压降对iTED的热电液压行为进行分析材料尺寸d和模块数量N。对于具有固定d和T_（in）值的单个模块iTED，与Re = 500相比，功率输出和效率分别提高了5倍和2倍。 100.对于给定的Re和d值，增加T_（in）可以增强设备性能。此外，增加d会增加内部电阻，并导致热量输入减少。 d对功率输出的影响是惊人的；对于给定的一组几何和热边界条件，存在一个最佳d，可实现最大功率输出。模块N的添加导致功率输出的显着改善以及所产生的电流和效率的降低。例如，与N = 1的值相比，N = 5的设备的功率输出增加了两倍以上，效率和电流均降低了近33％。

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  • 来源
    《Energy Conversion & Management》 |2014年第1期|458-468|共11页
  • 作者

    B.V.K. Reddy; Matthew Barry; John Li; Minking K. Chyu;

  • 作者单位

    Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, PA 15261, USA;

    Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, PA 15261, USA;

    Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, PA 15261, USA;

    Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, PA 15261, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Flow channel; Integrated; Numerical model; Performance; Thermoelectrics; Waste-heat recovery;

    机译：流道;集成;数值模型性能;热电;余热回收;

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