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首页> 外文学位 >Power and Efficiency Analysis of a Solar Central Receiver Combined Cycle Plant with a Small Particle Heat Exchanger Receiver.
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Power and Efficiency Analysis of a Solar Central Receiver Combined Cycle Plant with a Small Particle Heat Exchanger Receiver.

机译：带有小颗粒热交换器的太阳能中央接收器联合循环电厂的功率和效率分析。

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摘要

Two significant goals in solar plant operation are lower cost and higher efficiencies. To achieve those goals, a combined cycle gas turbine (CCGT) system, which uses the hot gas turbine exhaust to produce superheated steam for a bottoming Rankine cycle by way of a heat recovery steam generator (HRSG), is investigated in this work. Building off of a previous gas turbine model created at the Combustion and Solar Energy Laboratory at SDSU, here are added the HRSG and steam turbine model, which had to handle significant change in the mass flow and temperature of air exiting the gas turbine due to varying solar input.;A wide range of cases were run to explore options for maximizing both power and efficiency from the proposed CSP CCGT plant. Variable guide vanes (VGVs) were found in the earlier model to be an effective tool in providing operational flexibility to address the variable nature of solar input. Combined cycle efficiencies in the range of 50% were found to result from this plant configuration. However, a combustor inlet temperature (CIT) limit leads to two distinct Modes of operation, with a sharp drop in both plant efficiency and power occurring when the air flow through the receiver exceeded the CIT limit. This drawback can be partially addressed through strategic use of the VGVs.;Since system response is fully established for the relevant range of solar input and variable guide vane angles, the System Advisor Model (SAM) from NREL can be used to find what the actual expected solar input would be over the course of the day, and plan accordingly. While the SAM software is not yet equipped to model a Brayton cycle cavity receiver, appropriate approximations were made in order to produce a suitable heliostat field to fit this system.;Since the SPHER uses carbon nano-particles as the solar absorbers, questions of particle longevity and how the particles might affect the flame behavior in the combustor were addressed using the chemical kinetics software ChemkinPro by modeling the combustion characteristics both with and without the particles. This work is presented in the Appendix.
机译：太阳能电站运行的两个重要目标是降低成本和提高效率。为了实现这些目标，在这项工作中，研究了一种联合循环燃气轮机（CCGT）系统，该系统使用热燃气轮机的废气通过余热蒸汽发生器（HRSG）产生用于兰金循环的过热蒸汽。在SDSU燃烧和太阳能实验室创建的以前的燃气轮机模型的基础上，添加了HRSG和蒸汽轮机模型，该模型必须处理由于变化而导致离开燃气轮机的空气的质量流量和温度的重大变化太阳能输入。；在各种情况下进行了研究，以探索使拟建的CSP CCGT电厂最大化功率和效率的方案。在较早的模型中发现可变导流叶片（VGV）是有效的工具，可为解决太阳能输入的可变性提供操作灵活性。发现这种工厂配置可产生50％的联合循环效率。但是，燃烧室入口温度（CIT）极限会导致两种不同的运行模式，当流经接收器的空气流量超过CIT极限时，电厂效率和功率都会急剧下降。通过策略性地使用VGV可以部分解决此缺点。;由于已针对相关的太阳能输入范围和可变的导向叶片角度完全建立了系统响应，因此可以使用NREL的System Advisor模型（SAM）查找实际情况。预期的太阳能输入将在一天当中，并进行相应的计划。尽管尚未安装SAM软件来对布雷顿循环腔接收器进行建模，但为了产生适合此系统的合适的定日镜场，进行了适当的近似计算;由于SPHER使用碳纳米粒子作为太阳能吸收器，因此存在粒子问题使用化学动力学软件ChemkinPro，通过对有或没有颗粒的燃烧特性进行建模，解决了使用寿命长以及颗粒如何影响燃烧室中火焰行为的问题。这项工作在附录中介绍。

著录项

  • 作者

    Virgen, Matthew Miguel.;

  • 作者单位

    San Diego State University.;

  • 授予单位 San Diego State University.;
  • 学科 Mechanical engineering.;Energy.
  • 学位 M.S.
  • 年度 2016
  • 页码 102 p.
  • 总页数 102
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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