Integrated emissions control system for residential CWS furnace. Final report, September 20, 1989--March 20, 1993

This paper examines the principles of the functional purpose of the automated emission con-trol system, the basic principles of building the system, as well as the example of the practical application of the yf refining facility system, namely the branch of the Berezovsky GRES of Unipro, RUSAL Krasnoyarsk.

Download Full-text

Closed-Loop Combustion Control Using OH Radical Emissions

Volume 2: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations ◽

10.1115/2000-gt-0102 ◽

2000 ◽

Author(s):

Zhu (Julie) Meng ◽

Robert J. Hoffa ◽

Charles A. DeMilo ◽

Todd T. Thamer

Keyword(s):

Control System ◽

Simulation Model ◽

Gas Turbine ◽

Closed Loop ◽

System Simulation ◽

Combustion Process ◽

Operating Conditions ◽

Nox Emissions ◽

Oh Radical ◽

Emissions Control

The combustion process in gas-turbine engines produces emissions, especially nitrogen oxides (NOx) and carbon monoxide (CO), which change dramatically with combustor operating conditions. As part of this study, the application of active feedback control technologies to reduce thermal NOx emissions is modeled numerically and demonstrated experimentally. A new optical flame sensor, designed by Ametek Power & Industrial Products, has been successfully implemented as the feedback element in a proof-of-concept control system used to minimize NOx emissions. The sensor consists of a robust mechanical package, as well as electronics suitable for severe gas-turbine environments. Results from system rig tests correlate closely to theoretical predictions, as described in literature and produced by a control system simulation model. The control system simulation model predicts the efficacy of controlling engine operating characteristics based on chemical luminescence of the OH radical. The model consists of a fuel pump and metering device, a fuel-air mixing scheme, a combustion model, the new ultraviolet (UV) feedback flame sensor, and a simple gain block. The input reference to the proportional emissions control is the fuel-to-air equivalence ratio, which is empirically correlated to the desired low level of NOx emissions while satisfying other operating conditions, such as CO emissions and power. Results from the closed-loop emissions control simulation and rig tests were analyzed to determine the capability of the UV flame sensor to measure and control the combustion process in a gas-turbine engine. The response characteristics, overshoot percentage, rise time, settling time, accuracy, resolution, and repeatability are addressed.

Download Full-text

Emerging investigator series: oxidative potential of diesel exhaust particles: role of fuel, engine load, and emissions control

Environmental Science Processes & Impacts ◽

10.1039/c8em00571k ◽

2019 ◽

Vol 21 (5) ◽

pp. 819-830 ◽

Cited By ~ 1

Author(s):

Naman Sharma ◽

Cody Vanderheyden ◽

Kevin Klunder ◽

Charles S. Henry ◽

John Volckens ◽

...

Keyword(s):

Control System ◽

Diesel Exhaust ◽

Elemental Carbon ◽

Diesel Exhaust Particles ◽

Emissions Control ◽

Oxidative Potential ◽

Engine Load ◽

Exhaust Particles

Biodiesel and the use of an emissions control system significantly reduced the oxidative potential of diesel exhaust particles, which correlated with reduction in emissions of elemental carbon.

Download Full-text