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首页> 外文会议>Proceedings of the ASME power conference 2009 >GAS TURBINE PART LOAD EXHAUST GAS EMISSIONS TURNDOWN ENVELOPE TESTING METHODOLOGY
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GAS TURBINE PART LOAD EXHAUST GAS EMISSIONS TURNDOWN ENVELOPE TESTING METHODOLOGY

机译：燃气轮机部分负荷排放气体排放围护测试方法

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Economic and regulatory requirements have transformed today's power plant operations. High reserve margins and increased fuel costs have driven combined cycle plants that were once dispatched primarily at base-load to be cycled off during off-peak hours. For many plants, the increased cycling has contributed to shorter maintenance intervals and higher overall operating costs. Technology advancements in combustion system design and in gas turbine control systems has led to extensions in the emissions-compliant operating window of gas turbines, also known as turndown. With extended turndown capability, customers are now able to significantly reduce fuel consumption during minimum load operation at off-peak hours, while simultaneously minimizing the number of shutdowns. Extended turndown reduces operational costs by offsetting the fuel consumption costs against the costs associated with starting up and the maintenance costs associated with such starts.rnAlong with the increased emphasis on turndown capability, there has been a rising need to develop and standardize methods by which turndown capability can be accurately measured and reported. By definition, the limiting factor for turndown is the exhaust gas emissions, primarily CO and Nox. A concurrent and accurate measurement of performance and emissions is an essential ingredient to the determination of turndown capability. Of particular challenge is the method by which turndown results that were measured at one set of ambient conditions can be accurately projected to a specific guarantee condition, or to a range of ambient conditions, for which turndown capabilities have been guaranteed. The turndown projection methodology needs to consider combustion physics, control system algorithms, and basic cycle thermodynamics. Recent advances in the integration of empirically tuned physics-based combustion models with control system models and the gas turbine thermodynamicrnsimulation, has resulted in test procedures for use in the contractual demonstration of turndown capability. A discussion of these methods is presented, along with data showing the extent to which the methods have provided accurate and repeatable test results.
机译：经济和法规要求改变了当今的发电厂运营。高储备利润和增加的燃料成本推动了联合循环电厂的发展，这些联合循环电厂一开始主要以基本负荷调度，然后在非高峰时段关闭。对于许多工厂而言，增加的循环周期有助于缩短维护间隔和提高整体运营成本。燃烧系统设计和燃气轮机控制系统中的技术进步已导致燃气轮机的符合排放要求的运行范围（也称为调节）扩大。通过扩展的关闭功能，客户现在可以在非高峰时段以最小负载运行期间显着减少燃油消耗，同时最大程度地减少关闭次数。扩展调速功能通过将燃料消耗成本与启动相关的成本和此类启动相关的维护成本相抵销来降低运营成本。随着对调速功能的日益重视，对调速方法的开发和标准化方法的需求不断增长可以准确地测量和报告能力。根据定义，限制的限制因素是废气排放，主要是CO和Nox。同时准确地测量性能和排放是确定调节能力的重要组成部分。特殊的挑战是一种方法，通过该方法，可以将在一组环境条件下测得的调节结果准确地投影到一个特定的保证条件或一定范围的环境条件下，从而保证了调节能力。调低投影方法学需要考虑燃烧物理学，控制系统算法和基本循环热力学。基于经验的基于物理学的燃烧模型与控制系统模型以及燃气轮机热力学模拟的集成的最新进展，导致了用于合同性调低能力的测试程序。本文将对这些方法进行讨论，并提供数据说明这些方法在多大程度上提供了准确且可重复的测试结果。

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