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Prediction of thermal transients in district heating systems

机译：区域供热系统的热瞬态预测

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摘要

A prediction of thermal transients in district heating systems is important in order to adjust in an energy efficient manner the loads of heat power plants and pump stations with dynamic consumption needs during changes of the outside air temperature, the wind intensity, the solar radiation, or system startups and shut-downs. A model and corresponding computer code are developed with the aim to simulate the thermal transients in district heating systems. They are based on the high-order accurate numerical solution of the transient energy equation, and the hydraulic prediction of pressure and fluid flow rates within the complex pipe network. Thermal transients caused by an increase and decrease of the heat power plant load are simulated for real operating conditions of the district heating system. Predicted temperature front propagations show a good agreement with data measured at three consumer substations located in different parts of the district heating network and at different distances from the heat plant. The developed computational tool provides reliable information about time periods of temperature fronts propagation and heat distribution from the heat source to consumers within the whole district heating network.
机译：预测区域供热系统中的热瞬变非常重要，以便在室外空气温度，风强度，太阳辐射或温度变化时，以节能的方式调整具有动态消耗需求的热电厂和泵站的负荷系统启动和关闭。为了模拟区域供热系统中的热瞬态，开发了一个模型和相应的计算机代码。它们基于瞬态能量方程的高阶精确数值解，以及复杂管网内压力和流体流速的水力预测。针对区域供热系统的实际运行条件，模拟了由热电厂负荷的增加和减少引起的热瞬态。预测的温度前沿传播与在区域供热网络不同部分以及距热电厂不同距离的三个用户变电站所测得的数据显示出良好的一致性。开发的计算工具可提供有关整个区域供热网络中温度前沿传播和热量从热源到用户的热量分布传播时间段的可靠信息。

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  • 来源
    《Energy Conversion & Management》 |2009年第9期|2167-2173|共7页
  • 作者

    Branislav Zivkovic; Sanja Prica; Blazenka Maslovaric; Vladan Karamarkovic; Vojin Trkulja;

  • 作者单位

    Faculty of Mechanical Engineering, University of Belgrade, Kraljice Marije 16, 11120 Belgrade 35, Serbia;

    Faculty of Mechanical Engineering, University of Belgrade, Kraljice Marije 16, 11120 Belgrade 35, Serbia;

    Faculty of Mechanical Engineering, University of Belgrade, Kraljice Marije 16, 11120 Belgrade 35, Serbia;

    Faculty of Mechanical Engineering, Dositejeva 19, 36000 Kraljevo, Serbia;

    JKP Beogradske Elektrane, Savski Nasip 11, 11070 Belgrade, Serbia;

  • 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

    district heating system; thermal transients; simulation;

    机译：区域供热系统;热瞬变模拟;

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