System Modeling of ORNL s 20 MW(t) Wood-fired Gasifying Boiler

Conference · Fri Jan 01 04:00:00 EST 2010

OSTI ID:992112

Daw, C Stuart ^[1]; FINNEY, Charles E A ^[1]; Wiggins, Gavin ^[1]; Hao, Ye ^[1]

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1. ORNL

We present an overview of the new 20 MW(t) wood-fired steam plant currently under construction by Johnson Controls, Inc. at the Oak Ridge National Laboratory in Tennessee. The new plant will utilize a low-temperature air-blown gasifier system developed by the Nexterra Systems Corporation to generate low-heating value syngas (producer gas), which will then be burned in a staged combustion chamber to produce heat for the boiler. This is considered a showcase project for demonstrating the benefits of clean, bio-based energy, and thus there is considerable interest in monitoring and modeling the energy efficiency and environmental footprint of this technology relative to conventional steam generation with petroleum-based fuels. In preparation for system startup in 2012, we are developing steady-state and dynamic models of the major process components, including the gasifiers and combustor. These tools are intended to assist in tracking and optimizing system performance and for carrying out future conceptual studies of process changes that might improve the overall energy efficiency and sustainability. In this paper we describe the status of our steady-state gasifier and combustor models and illustrate preliminary results from limited parametric studies.

• Research Organization: Oak Ridge National Laboratory (ORNL); Fuels, Engines and Emissions Research Center
• Sponsoring Organization: ORNL LDRD Seed-Money
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 992112
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
BOILERS
Biomass gasification boiler
ENERGY EFFICIENCY
GAS GENERATORS
MATHEMATICAL MODELS
MONITORING
ORNL
PARAMETRIC ANALYSIS
PERFORMANCE
PRODUCER GAS
STAGED COMBUSTION
STEAM GENERATION PLANTS
WOOD BURNING FURNACES