A detailed study is presented in this paper concerning the changes required to transform a GE/Nuovo Pignone PGT2 gas turbine into a humid air turbine (HAT). The PGT2 is a 2 MW single-shaft gas turbine with a two stage centrifugal compressor and single can combustor. These features of the compressor and the combustion chamber are very important, because they reduce to a minimum the modifications necessary to add all the components required for operation in HAT cycle mode. This paper shows the performance of the PGT2 gas turbine in three different modified configurations: 1) regenerated cycle, 2) intercooled-regenerated cycle and 3) HAT cycle with flue gas condensation. A detailed economic study is presented of the regenerated and the HAT cycles. The intercooledregenerated cycle was not considered in the economic analysis, because it does not reach the performance of the HAT cycle but it has not the advantage of being a dry cycle. All the components being added to the PGT2 are sized to determine with a sufficient accuracy their cost. The economic analysis presents a detailed cost analysis of the optimal configurations for maximum efficiency, and allows the calculation of the capital cost of the modified gas turbine. Return of investment is also presented in different economic situations with varying electricity and fuel prices.
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机译:本文介绍了有关将GE / Nuovo Pignone PGT2燃气轮机改造成湿空气轮机(HAT)所需的变化的详细研究。 PGT2是一款2 MW单轴燃气轮机,带有两级离心压缩机和单罐燃烧室。压缩机和燃烧室的这些特征非常重要,因为它们将添加HAT循环模式下运行所需的所有组件所需的修改降至最低。本文展示了PGT2燃气轮机在三种不同的修改配置下的性能:1)再生循环,2)中冷再生循环和3)烟气冷凝的HAT循环。提出了有关再生和HAT循环的详细经济研究。在经济分析中未考虑使用中冷再生循环,因为它没有达到HAT循环的性能,但没有干循环的优势。确定添加到PGT2的所有组件的大小,以足够的精度确定其成本。经济分析提供了最佳配置的详细成本分析,以实现最大效率,并可以计算出改进型燃气轮机的投资成本。在不同的经济情况下,随着电力和燃料价格的变化,也会出现投资回报。
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