DSG槽式太阳能集热器非线性分布参数模型及动态特性

发布时间：2018-05-30 00:46

本文选题：抛物线槽式 + 直接蒸汽发电　；参考：《中国电机工程学报》2014年11期

【摘要】：直接蒸汽发电(direct steam generation,DSG)槽式太阳能热发电系统的集热器长度一般很长,且具有明显的分布参数特征。因此,建立DSG槽式太阳能集热器的非线性分布参数模型,以DSG集热器入口工质温度、质量流量和出口压力为边界条件,采用迎风格式的有限差分法对模型进行离散求解。仿真研究了DSG集热器主要参数在太阳辐射强度、给水温度和给水流量变化等扰动工况下的响应特性,结果与文献实验结果基本一致,验证了模型的正确性。结果表明:太阳辐射强度降低时,出口工质温度下降得很快;给水流量或给水温度小幅下降时,出口工质温度和流量都会滞后响应且变化显著;DSG集热器出口工质流量在某些情况下会发生脉动,实际应用中应避免脉动状态的发生或降低其影响。
[Abstract]:The collector length of direct steam generation (DSG) trough solar thermal power generation system is usually very long and has obvious distribution parameters. Therefore, the nonlinear distribution parameter model of DSG trough solar collector is established. Taking the inlet temperature, mass flow rate and outlet pressure of DSG collector as the boundary conditions, the upwind finite difference method is used to solve the model discretely. The response characteristics of the main parameters of DSG collector under disturbed conditions such as solar radiation intensity, feed water temperature and feed water flow are studied by simulation. The results are in good agreement with the experimental results and verify the correctness of the model. The results show that when the solar radiation intensity decreases, the outlet working fluid temperature decreases rapidly, and when the feed water flow rate or feed water temperature decreases slightly, Both the temperature and flow rate of the outlet working fluid will lag the response and the flow rate of the outlet working fluid of DSG collector will fluctuate under some circumstances. The pulsation state should be avoided or reduced in practical application.
【作者单位】：东南大学能源与环境学院;河海大学能源与电气学院;
【基金】：国家重点基础研究发展计划项目(973计划)(2010CB227102) 江苏省自然科学基金项目(BK20131369)~~
【分类号】：TM615.1

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