A Strategy of Mixture preparation for Methane Direct-Fired sCO2 Combustors

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F18%3A00328996" target="_blank" >RIV/68407700:21220/18:00328996 - isvavai.cz</a>

Result on the web

<a href="http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=2701549" target="_blank" >http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=2701549</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1115/GT2018-75557" target="_blank" >10.1115/GT2018-75557</a>

Result language

angličtina

Original language name

A Strategy of Mixture preparation for Methane Direct-Fired sCO2 Combustors

Original language description

The reactor residence time required for a sCO(2) combustor is comparatively higher than an equal power, air-diluted conventional combustor. Therefore, the strategies to reduce the reactor residence time are very important in the design of sCO(2) combustors. The current work recommends a method to reduce the residence time requirement in the sCO(2) combustion chamber. Here, the combustor is modelled by coupling the perfectly-stirred-reactor (PSR) and plug-flow reactor (PFR) models along with the detailed Aramco 2.0 combustion chemical kinetic mechanism. The real gas effects are considered by using the Soave-Redlich-Kwong (SRK) equation of state incorporated in CHMEKIN-RG. Though, the CO emission level at the exit of the primary zone of the sCO(2) combustor is lower or in some cases equal to the conventional combustor, the further decline of CO in the dilution zone is identified as very poor. Therefore, very high CO levels can be expected at the exit of the sCO(2) combustor compared to conventional combustors. CO from the sCO(2) combustor exhaust can be eliminated by lean operation of the combustor and the excess O-2 retained in the re-cycled CO2 stream due to lean operation can be mixed with primary methane before entering the primary combustion zone. This strategy is shown to reduce the primary zone residence time requirement of sCO(2) combustion. However, the minimum level of O-2 in the re-cycled CO2 stream is approximately 5000 ppm and the minimum required residence time in this pre-mixing chamber is around 4 ms. Also, it is observed that the primary zone residence time requirement decreases linearly with respect to the O-2 level in the re-cycled CO2 stream.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20704 - Energy and fuels

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2018

Confidentiality

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

Article name in the collection

ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition, Volume 9: Oil and Gas Applications; Supercritical CO2 Power Cycles; Wind Energy

ISBN

978-0-7918-5118-0

ISSN

—

e-ISSN

—

Number of pages

11

Pages from-to

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Publisher name

American Society of Mechanical Engineers - ASME

Place of publication

New York

Event location

Lillestrom

Event date

Jun 11, 2018

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000457071300039