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首页> 外文会议>American Society of Mechanical Engineers(ASME) Turbo Expo vol.7; 20040614-17; Vienna(AT) >REGENERATIVE GAS TURBINES WITH DIVIDED EXPANSION
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REGENERATIVE GAS TURBINES WITH DIVIDED EXPANSION

机译：分体式可再生燃气轮机

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摘要

Recuperated gas turbines are currently drawing an increased attention due to the recent commercialization of micro gas turbines with recuperation. This system may reach a high efficiency even for the small units of less than 100 kW. In order to improve the economics of the plants, ways to improve their efficiency are always of interest. Recently, two independent studies have proposed recuperated gas turbines to be configured with the turbine expansion divided, in order to obtain higher efficiency. The idea is to operate the system with a gas generator and a power turbine, and use the gas from the gas generator part for recuperation ahead of the expansion in the power turbine. The present study is more complete than the predecessors in that the ranges of the parameters have been extended and the mathematical model is more realistic using an extensive simulation program. It is confirmed that the proposed divided expansion can be advantageous under certain circumstances. But, in order for todays micro gas turbines to be competitive, the ther-modynamic efficiencies will have to be rather high. This requires that all component efficiencies including the recuperator effectiveness will have to be high. The advantages of the divided expansion manifest themselves over a rather limited range of the operating parameters, that lies outside the range required to make modern micro turbines economically competitive.
机译：由于近来具有回热的微型燃气轮机的商业化，因此，回热式燃气轮机正引起越来越多的关注。即使对于小于100 kW的小型机组，该系统也可以达到很高的效率。为了改善工厂的经济性，一直在关注提高其效率的方法。近来，两项独立的研究提出了将回热式燃气轮机配置为将涡轮机膨胀分开，以便获得更高的效率。这个想法是用气体发生器和动力涡轮机运行系统，并在动力涡轮机膨胀之前使用来自气体发生器部件的气体进行换热。本研究比以前的研究更加完整，因为使用了广泛的仿真程序，参数的范围得到了扩展，数学模型更加逼真。可以确定的是，在某些情况下，建议的分式扩展可能是有利的。但是，为了使当今的微型燃气轮机具有竞争力，热动力效率将必须很高。这就要求包括换热器效率在内的所有组件效率都必须很高。分度膨胀的优点在相当有限的运行参数范围内体现出来，该范围超出了使现代微型涡轮机具有经济竞争力所需的范围。

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