PREDICTION OF NOX EMISSIONS FOR FBC BOILERS BY EMPIRICAL MODELS ? THE INFLUENCE OF SCALE-UP

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F14%3A00224237" target="_blank" >RIV/68407700:21220/14:00224237 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

PREDICTION OF NOX EMISSIONS FOR FBC BOILERS BY EMPIRICAL MODELS ? THE INFLUENCE OF SCALE-UP

Popis výsledku v původním jazyce

Reliable prediction of NOX emissions can provide useful information for boiler design and fuel selection. The disadvantages and complexity of recently used kinetic NOX prediction models could be overcome by developing a simple empirical model. However, existing empirical models for prediction of NOX are used exclusively for PCC boiler. This paper aims to modify some commonly used PCC empirical NOX prediction models ? Pohl´s mdoel and Ibler´s model ? to fit the FBC boilers. The data from large scale FBCunits are used for empirical models modification and compared with the data from pilot scale 0,5 MWt FBC boiler. The reliability of proposed modifications to physical models and the influence of scale-up are discussed. The maximum reliability with R2= 60,86 % was achieved by modified Ibler´s model. If fuel mixtures were excluded the reliability increased to 81,36 %. The NOX emissions of pilot scale boiler were higher compared to large scale units. However, these values were in agreement

Název v anglickém jazyce

PREDICTION OF NOX EMISSIONS FOR FBC BOILERS BY EMPIRICAL MODELS ? THE INFLUENCE OF SCALE-UP

Popis výsledku anglicky

Reliable prediction of NOX emissions can provide useful information for boiler design and fuel selection. The disadvantages and complexity of recently used kinetic NOX prediction models could be overcome by developing a simple empirical model. However, existing empirical models for prediction of NOX are used exclusively for PCC boiler. This paper aims to modify some commonly used PCC empirical NOX prediction models ? Pohl´s mdoel and Ibler´s model ? to fit the FBC boilers. The data from large scale FBCunits are used for empirical models modification and compared with the data from pilot scale 0,5 MWt FBC boiler. The reliability of proposed modifications to physical models and the influence of scale-up are discussed. The maximum reliability with R2= 60,86 % was achieved by modified Ibler´s model. If fuel mixtures were excluded the reliability increased to 81,36 %. The NOX emissions of pilot scale boiler were higher compared to large scale units. However, these values were in agreement

Druh

O - Ostatní výsledky

CEP obor

JE - Nejaderná energetika, spotřeba a užití energie

OECD FORD obor

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Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů