An Experimentally Verified NOx Emission Model for Gas Turbine Combustors

Abstract

An analytical model has been developed to simulate the thermal NOx emission processes in various gas turbine combustors for a variety of fuels. The NOx emissions predicted by the model are in excellent agreement with available laboratory and field data. Its capability to simulate the water injection process accurately has been demonstrated previously. Comprehensive understanding of the NOx emission processes in gas turbine combustors has been gained through the current analytical studies. NOx emissions as influenced by ambient humidity, changes in combustor geometry, type of fuel used and changes in operating parameters can now be evaluated quantitatively through a priori prediction and have been verified by available laboratory and field data. The analytical model has also been demonstrated to be a powerful guidance tool in directing the experimental testing program in an effort to reduce NOx emissions from gas turbine combustors.

The Influences of Fuel Composition and Spray Characteristics on Nitric Oxide Formation

“…Hung (1975), Odgers (1975), and Lefebvre (1983). The development of suitable models is made complicated by the fact that any change in combustor operating conditions is invariably acornpanied by changes in fuel spray characteristics and the size and structure of the Downloaded by [University of Victoria] at 16:08 08 April 2015 combustion zone.…”

Evaluation of thermal NOx emission characteristics of high efficiency gas turbines using refuse-recovered low BTU gases

“…Consequently, let us utilize an analytical model that requires no experimental data. Among various analytical models proposed so far, a model by Hung (1975 and1976) whose accuracy has been verified by using laboratory data and field test results, is assumed to be utilized in this study.…”

A Feasibility Study on the Predictive Emission Monitoring System Applied to the Hsinta Power Plant of Taiwan Power Company

“…Predictive models based on thermodynamics have some applications; 2 for example, GE new gas turbines have applied the model they develooped to replace the CEMS. 3 The major steps of this thermodynamic model are (1) collecting NO x emission data and calibrating to International Organization for Standardization (ISO) condition by using the U.S. Environmental Protection Agency (EPA) atmospheric calibration equation, (2) establishing a NO x emission index based on an air-fuel ratio formula, (3) based on the preceding data, a computer program can estimate actual air-fuel ratio and then use the results to calculate amended ISO NO x emission index, and (4) using EPA atmospheric calibration equation to calibrate ISO NO x emission index to actual atmospheric condition.…”