Development of a Vortexing Combustor (VC) for Space/Water Heating Applications (Cold Flow Modeling)

Technical Report · Sat Aug 01 00:00:00 EDT 1987

DOI:https://doi.org/10.2172/5858423· OSTI ID:5858423

Nieh, S. ^[1]

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1. The Catholic Univ. of America, Washington, DC (United States)

This research consists of an experimental/analytical study on the cold flow modeling of coal-firing Vortexing Combustion (VC) technique for commercial heating applications having a firing rate of 2--4 MMBtu/hr. This progress report summarizes the work performed during the period of April 7, 1987 to July 31, 1987. Research efforts on the refinement of VC concept and system design, and mathematical modeling of VC processes were made. A thermal analysis of different VC arrangements concludes that subadiabatic combustion VC system featuring a high thermal efficiency and a low excess air factor is best suited for our purpose. The conceptual design, configuration, and performance of a 3 MMBtu/hr sub-adiabatic VC system are discussed in details. Formulations of the math models for both gas and particle flows in a VC unit are established by adopting Algebraic Stress Model (ASM) to account for the turbulence in the strong swirling flow in the VC. The current numerical work focuses on the finite difference formulation of gas/solid flows and the development of the associated computational code.

• Research Organization: The Catholic Univ. of America, Washington, DC (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC22-87PC79661
• OSTI ID: 5858423
• Report Number(s): DOE/PC/79661--T4; ON: DE91013183
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000* -- Coal
Lignite
& Peat-- Combustion
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
COMBUSTION
COMBUSTORS
DESIGN
DOCUMENT TYPES
ENERGY SOURCES
FOSSIL FUELS
FUELS
HEATING
MATERIALS
MATHEMATICAL MODELS
OXIDATION
PROGRESS REPORT
SPACE HEATING
THERMOCHEMICAL PROCESSES
WATER HEATING