Detail publikačního výsledku

Mixing of flu-gas stream by local acceleration in channel of biomass boiler

POSPÍŠIL, J.; LISÝ, M.; ŠPILÁČEK, M.

Original Title

Mixing of flu-gas stream by local acceleration in channel of biomass boiler

English Title

Mixing of flu-gas stream by local acceleration in channel of biomass boiler

Type

Paper in proceedings (conference paper)

Original Abstract

A built up numerical model represents the afterburner channel in a two-chamber biomass boiler with capacity 200 kW. The boiler is designed for combustion of very moist biomass. The trace gas was used for identification of mixing quality. The trace gas was virtually distributed in separate points in front of the duct. 3D concentration fields in the duct were computed. 2D concentration fields in the cross section led in the end of the duct was used for evaluation of mixing quality. Target of carried out parametrical studies was to find out an optimum shape of an afterburner channel which could provide maximum mixing of combustion air flow with a flow of flue gas and combustible components in volatile matter. Adjustments to the channel shape can help to increase combustion efficiency and decrease emission production (especially CO, particulate matter and organic gaseous compounds). A local acceleration of the flow was used for encouragement of mixing process in the duct. Different size of cross section windows was tested and compared from the view of mixing quality.

English abstract

A built up numerical model represents the afterburner channel in a two-chamber biomass boiler with capacity 200 kW. The boiler is designed for combustion of very moist biomass. The trace gas was used for identification of mixing quality. The trace gas was virtually distributed in separate points in front of the duct. 3D concentration fields in the duct were computed. 2D concentration fields in the cross section led in the end of the duct was used for evaluation of mixing quality. Target of carried out parametrical studies was to find out an optimum shape of an afterburner channel which could provide maximum mixing of combustion air flow with a flow of flue gas and combustible components in volatile matter. Adjustments to the channel shape can help to increase combustion efficiency and decrease emission production (especially CO, particulate matter and organic gaseous compounds). A local acceleration of the flow was used for encouragement of mixing process in the duct. Different size of cross section windows was tested and compared from the view of mixing quality.

Keywords

CFD analysis, flue-gas, mixing, emissions

Key words in English

CFD analysis, flue-gas, mixing, emissions

Authors

POSPÍŠIL, J.; LISÝ, M.; ŠPILÁČEK, M.

RIV year

2016

Released

16.07.2015

Publisher

WSEAS Press

Location

Zakyntos, Řecko

ISBN

978-1-61804-324-5

Book

Reacent Advances in Environmental and Earth Sciences and Economic

Edition

1

ISBN

2227-4359

Periodical

Energy, Environmental and Structural Engineering

Volume

38

Number

1

State

Hellenic Republic

Pages from

345

Pages to

350

Pages count

6

Full text in the Digital Library

http://hdl.handle.net/

BibTex

@inproceedings{BUT120146,
  author="Jiří {Pospíšil} and Martin {Lisý} and Michal {Špiláček}",
  title="Mixing of flu-gas stream by local acceleration in channel of biomass boiler",
  booktitle="Reacent Advances in Environmental and Earth Sciences and Economic",
  year="2015",
  series="1",
  journal="Energy, Environmental and Structural Engineering",
  volume="38",
  number="1",
  pages="345--350",
  publisher="WSEAS Press",
  address="Zakyntos, Řecko",
  isbn="978-1-61804-324-5",
  issn="2227-4359"
}