Dynamics and Control of a Gas-fired Furnace
نویسندگان
چکیده
A non-linear model has been developed for a gas-fired furnace in which oil is heated. The model is applicable from minimum to maximum heat load of the furnace. The dynamics of the model have been compared to experimental results, which were obtained for a pilot-scale furnace. They are in good agreement. A cascade control with feed-forward action has been compared to single feed-back control. Proportional feed-forward action already gives much better results than the latter control. An approximative expression is derived for the large time constant in the furnace dynamics.
منابع مشابه
CFD Evaluation of Fuel Lean Gas Reburn (FLGR) and Selective Non-Catalytic Reduction in Owensboro Municipal Utilities’ Elmer Smith Station
A Computational Fluid Dynamics (CFD) modeling study has been conducted to evaluate the application of overfire air (OFA), Fuel Lean Gas Reburn (FLGR), and Selective Non-Catalytic Reduction (SNCR) to reduce NOx emissions from Owensboro Municipal Utilities’ Elmer Smith Station. Smith Station Unit 1 is a nominally rated 150 MWe single-wall cyclone fired boiler with three barrels. FLGR is a NOx con...
متن کاملThe Modeling of a Laboratory Natural Gas - Fired Furnace with a Higher - OrderProjection Method for Unsteady Combustion
A higher-order, embedded boundary projection method for axisymmetric, unsteady, low-Mach number combustion is used to model a natural gas ame from a 300kW IFRF burner in the Burner Engineering Research Laboratory (BERL) at Sandia National Laboratory under hot wall conditions. The numerical predictions presented are the late simulated-time results of a computation of unsteady ow in the furnace. ...
متن کاملMarket Based Analysis of Natural Gas and Electricity Export via System Dynamics
By increasing the extraction of natural gas, its role in the restructured power systems is being expanded, due to its lower pollution. Iran has the second largest reserves of natural gas in the world and exports it to different countries. This paper represents long run analysis of natural gas export from Iran to Turkey as a case study, considering direct transfer and exporting via the power mar...
متن کاملEnhancing the Use of Coals by Gas Reburning - Sorbent Injection
The purpose of the Guideline Manual is to provide recommendations for the application of combined gas reburning-sorbent injection (GR-SI) technologies to pre-NSPS boilers. The manual includes design recommendations, performance predictions, economic projections and comparisons with competing technologies. The report also includes an assessment of boiler impacts. Two full-scale demonstrations of...
متن کاملآنالیز اگزرژی و ارزیابی راندمان برای یک کورۀ ذوب آلومینیوم
Abstract : The efficiency of a natural gas-fired aluminium melting furnace in a caster plant is examined using energy and exergy methods, to improve understanding of the burner system in the furnace and so that potential improvements can be identified. Such improvements not only reduce fuel consumtion, but also mitigate environmental emissions and impacts such as climate change. In this study,...
متن کامل