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Numerical analysis of wind supercharging solar chimney power plant combined with seawater desalination and gas waste heat

机译：风电增压太阳能烟囱发电厂的数值分析与海水脱盐和气体余热相结合

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摘要

Performance investigation of the wind supercharging solar chimney power plant combined with seawater desalination and gas waste heat (WSCPPDW) was conducted in this study. The objective of this paper is to investigate the influence of operational and structural parameters on the WSCPPDW performance and to analyze the flow field characteristics in the WSCPPDW. The mathematical model of WSCPPDW, proposed before, could hardly reflect the effect of structural parameters and flue gas jet. Hence, 3D numerical simulation of WSCPPDW was carried out, using CFD ANSYS Fluent. To explore the optimum operational and structural parameters of WSCPPDW, simulations with different turbine rotational speed, nozzle length, chimney outlet radius and chimney mixing section length were conducted. The results show that the flue gas jet could form a high-temperature and high-speed jet area in the chimney, having entrainment effect on the surrounding airflow. Besides, as the turbine rotational speed increases, the freshwater yield decreases and the turbine shaft power increases first and then decreases, getting peak at 200 rpm. With the increase of nozzle length, the freshwater yield and turbine shaft power first increases and then decreases; With the increase of the chimney outlet radius, the freshwater yield and turbine shaft power first increases and then decreases; As the chimney mixing section length increases, the freshwater yield and turbine shaft power increases significantly at first and then decreases slightly. From the parametric study, it is concluded that for the turbine rotational speed, the nozzle length, the chimney outlet radius and the chimney mixing section length of 200 rpm, 6 m, 9 m and 60 m, respectively, better performance could be achieved. Concretely, the power generation and hourly freshwater yield of WSCPPDW reached 377.9 kW and 20.3 ton/h, respectively.
机译：本研究进行了风电增压太阳能烟囱发电厂的性能调查与海水脱盐和气体废热（WSCPPDW）进行。本文的目的是研究运营和结构参数对WSCPDW性能的影响，并分析WSCPPDW中的流场特征。 WSCPPDW的数学模型提出之前，可能几乎不反映结构参数和烟气喷射的影响。因此，使用CFD ANSYS流畅的WSCPPDW的3D数值模拟。为了探讨WSCPPDW的最佳操作和结构参数，进行了不同涡轮机转速，喷嘴长度，烟囱出口半径和烟囱混合截面长度的模拟。结果表明，烟气喷射可以在烟囱中形成高温和高速喷射区域，对周围的气流具有夹带效果。此外，随着涡轮机转速的增加，淡水产量降低，涡轮轴功率首先增加，然后减少，达到200 rpm的峰值。随着喷嘴长度的增加，淡水产量和涡轮轴功率首先增加，然后减少;随着烟囱出口半径的增加，淡水产量和涡轮机轴功率首先增加，然后减少;随着烟囱混合截面长度的增加，淡水产量和涡轮轴功率首先增加，然后略微降低。从参数学研究中，它得出结论，对于涡轮机转速，喷嘴长度，烟囱出口半径和烟囱混合截面长度为200 rpm，6米，9米和60米，可以实现更好的性能。具体地，WSCPPDW的发电和每小时淡水产量分别达到377.9千瓦和20.3吨/小时。

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  • 来源
    《Energy Conversion & Management》 |2020年第11期|113250.1-113250.15|共15页
  • 作者

    Zuo Lu; Dai Pengzhan; Liu Zihan; Qu Ning; Ding Ling; Qu Bo; Yuan Yue;

  • 作者单位

    Hohai Univ Coll Energy & Elect Engn Nanjing 210098 Peoples R China;

    Hohai Univ Coll Energy & Elect Engn Nanjing 210098 Peoples R China;

    Hohai Univ Coll Energy & Elect Engn Nanjing 210098 Peoples R China;

    Hohai Univ Coll Energy & Elect Engn Nanjing 210098 Peoples R China;

    Hohai Univ Coll Energy & Elect Engn Nanjing 210098 Peoples R China;

    Hohai Univ Coll Energy & Elect Engn Nanjing 210098 Peoples R China;

    Hohai Univ Coll Energy & Elect Engn Nanjing 210098 Peoples R China;

  • 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

    Waste heat; Solar chimney; Desalination; Wind supercharging; Flue gas jet;

    机译：浪费热量;太阳烟囱;海水化;风增压;烟气喷射;

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