- Title
- Oxy-fuel heat transfer characteristics and its impact on boiler design
- Creator
- Wall, Terry; Liu, Yinghui; Khare, Sameer
- Relation
- Australian Combustion Symposium 2009. Proceedings of the Australian Combustion Symposium 2009 (Brisbane, Qld 2-4 December, 2009) p. 159-162
- Relation
- http://www.mech.uq.edu.au/conferences/ACS2009
- Publisher
- School of Mechanical and Mining Engineering, University of Queensland
- Resource Type
- conference paper
- Date
- 2009
- Description
- Oxy-fuel combustion is considered as an important technology option for carbon capture and storage (CCS) from existing and new-build power plants. The understanding of heat transfer aspect underpins oxy-fuel technology demonstration and deployment. The aim of the paper is to address the role of emissivity in oxy-fuel combustion heat transfer as furnace sizes scale up. The emissivity of combustion products including gases and fly ash particles are considered for one coal fired in three different oxy-fuel furnaces, and compared with air fired furnaces. A well stirred reactor model which takes into account the impact of furnace volume and surface area as furnace sizes scale up is used. It is concluded oxy-fuel combustion can achieve the same heat transfer rate as air-firing, and lower volumetric gas flow rate, lower adiabatic flame temperature, lower flue exit gas temperature, due to higher emissivity in oxy-fuel firing. As furnace sizes scale up, combustion gas temperatures in oxy-fuel combustion increases, but lower than gas temperatures met in air-firing in the furnaces of the same scale.
- Subject
- oxy-fuel; heat transfer; emissivity; radiation
- Identifier
- http://hdl.handle.net/1959.13/919957
- Identifier
- uon:9033
- Identifier
- ISBN:9781864999802
- Language
- eng
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