• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>2003 ASME(American Society of Mechanical Engineers) Turbo Expo; Jun 16-19, 2003; Atlanta, Georgia >THEORETICAL AND EXPERIMENTAL EVALUATION OF A PLATE HEAT EXCHANGER AFTERCOOLER IN AN EVAPORATIVE GAS TURBINE CYCLE
【24h】

THEORETICAL AND EXPERIMENTAL EVALUATION OF A PLATE HEAT EXCHANGER AFTERCOOLER IN AN EVAPORATIVE GAS TURBINE CYCLE

机译：蒸发燃气轮机中板式换热器尾叶的理论和实验评估

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The evaporative gas turbine pilot plant (EvGT) has been in operation at Lund Institute of Technology in Sweden since 1997. This article presents the experimental and theoretical results of the latest process modifications made, I.e. The effect of the installation of an aftercooler. The purpose of the aftercooier is to increase the performance of the cycle by utilizing more low-level heat in the humidification tower. The chosen aftercooler is of plate heat exchanger type, which is very compact, has high thermal efficiency and low pressure drop. The installation of an aftercooler lowers the temperature of the air entering the humidification tower. This also lowers the temperature of the circulating humidification water, which facilitates the extraction of more low-level heat from the economizer. This low-level heat can be utilized to evaporate more water in the humidification tower and thus increase the gas flow in the expander. The pilot plant has been operated at different loads and the measured results has been evaluated and compared with theoretical models. The performance of a plate heat exchanger in power plant applications has also been evaluated. Experience from the measurements has then been used for the potential cycle calculations. It has been shown that the aftercooler lowers the flue gas temperature in the pilot plant to 93℃, the rate of humidification was increased from 13 wt% to 14.5 wt%, and the pressure drop on the airside in the aftercooler is 1.6%. The electrical efficiency for the pilot plant was increased by 0.4%. The increase in electrical efficiency for a more advanced EvGT cycle with an intercooler, aftercooler and economizer will be around 3.5 percentage units in comparison with a cycle without an aftercooler. The plate heat exchanger showed very good performance in terms of cost, size, pressure drop and thermal efficiency. An alternative to the chosen heat exchanger is the tubular one, but it is 10 times beavierr, has a higher pressure drop and is more expensive. The aftercooler increases the electrical efficiency significantly by lowering the flue gas temperature and increasing the expander work.
机译：自1997年以来，蒸发式燃气轮机中试装置（EvGT）一直在瑞典隆德技术学院投入运行。本文介绍了最新工艺改进（即：安装后冷却器的效果。冷却器的目的是通过在加湿塔中利用更多的低位热量来提高循环的性能。所选的后冷却器为板式换热器，结构紧凑，热效率高，压降低。后冷却器的安装降低了进入加湿塔的空气温度。这也降低了循环加湿水的温度，从而有利于从省煤器中提取更多的低热量。这种低水平的热量可以用来在加湿塔中蒸发更多的水，从而增加膨胀机中的气体流量。中试工厂已经在不同的负载下运行，并且对测量结果进行了评估并与理论模型进行了比较。还评估了板式换热器在电厂应用中的性能。然后将来自测量的经验用于潜在的周期计算。结果表明，后冷却器将中试装置的烟气温度降低至93℃，加湿率从13 wt％增加到14.5 wt％，后冷却器中空气侧的压降为1.6％。试点工厂的电效率提高了0.4％。与没有后冷却器的循环相比，使用中冷器，后冷却器和省煤器的更先进的EvGT循环的电效率提高约3.5个百分点。板式换热器在成本，尺寸，压降和热效率方面表现出非常好的性能。所选择的热交换器的另一种选择是管式热交换器，但它的价格要高10倍，压降更高，价格也更高。后冷却器通过降低烟道气温度和增加膨胀机功来显着提高电效率。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号