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首页> 外文期刊>Journal of Power and Energy Engineering >Performance Assessment of a Shell Tube Evaporator for a Model Organic Rankine Cycle for Use in Geothermal Power Plant
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Performance Assessment of a Shell Tube Evaporator for a Model Organic Rankine Cycle for Use in Geothermal Power Plant

机译：用于地热发电厂的有机兰金循环模型壳管式蒸发器的性能评估

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摘要

The global energy demand increases with development and population rise. Most electrical power is currently generated by conventional methods from fossil fuels. Despite the high energy demand, the conventional energy resources such as fossil fuels have been declining and harmful combustion byproducts are causing global warming. The Organic Rankine Cycle power plant is a very effective option for utilization of low grade heat sources for power generation. In the Organic Rankine Cycle heat exchangers such as evaporators and condensers are key components that determine its performance. Researches indicated that shell tube heat exchangers are effectively utilized in this cycle. The design of the heat exchanger involves establishing the right flow pattern of the interacting fluids. The performance of these exchangers can be optimized by inserting baffles in the shell to direct the flow of fluid across the tubes on shell side. In this work heat exchangers have been developed to improve heat recovery from geothermal brine for additional power generation. The design involved sizing of heat exchanger (evaporator) using the LMTD method based on an expected heat transfer rate. The heat exchanger of the model power plant was tested in which hot water simulated brine. The results indicated that the heat exchanger is thermally suitable for the evaporator of the model power plant.
机译：随着发展和人口的增长，全球能源需求增加。当前，大多数电力是通过常规方法由化石燃料产生的。尽管能源需求很高，但传统能源（例如化石燃料）一直在减少，有害的燃烧副产物正在引起全球变暖。有机朗肯循环发电厂是利用低品位热源发电的非常有效的选择。在有机朗肯循环中，诸如蒸发器和冷凝器之类的热交换器是决定其性能的关键组件。研究表明，在此循环中可以有效利用壳管式热交换器。热交换器的设计涉及建立相互作用的流体的正确流动模式。这些交换器的性能可以通过在壳体中插入折流板来引导流体流过壳体侧的管道来优化。在这项工作中，已经开发了热交换器以改善从地热盐水中回收的热量，以用于额外的发电。该设计涉及根据预期的传热速率，使用LMTD方法确定热交换器（蒸发器）的尺寸。测试了模型电厂的热交换器，其中的热水模拟了盐水。结果表明，该热交换器在热量上适合于模型电站的蒸发器。

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