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Title: Achieving Tier 4 Emissions in Biomass Cookstoves

Abstract

Previous literature on top-lit updraft (TLUD) gasifier cookstoves suggested that these stoves have the potential to be the lowest emitting biomass cookstove. However, the previous literature also demonstrated a high degree of variability in TLUD emissions and performance, and a lack of general understanding of the TLUD combustion process. The objective of this study was to improve understanding of the combustion process in TLUD cookstoves. In a TLUD, biomass is gasified and the resulting producer gas is burned in a secondary flame located just above the fuel bed. The goal of this project is to enable the design of a more robust TLUD that consistently meets Tier 4 performance targets through a better understanding of the underlying combustion physics. The project featured a combined modeling, experimental and product design/development effort comprised of four different activities: Development of a model of the gasification process in the biomass fuel bed; Development of a CFD model of the secondary combustion zone; Experiments with a modular TLUD test bed to provide information on how stove design, fuel properties, and operating mode influence performance and provide data needed to validate the fuel bed model; Planar laser-induced fluorescence (PLIF) experiments with a two-dimensional optical test bedmore » to provide insight into the flame dynamics in the secondary combustion zone and data to validate the CFD model; Design, development and field testing of a market ready TLUD prototype. Over 180 tests of 40 different configurations of the modular TLUD test bed were performed to demonstrate how stove design, fuel properties and operating mode influences performance, and the conditions under which Tier 4 emissions are obtainable. Images of OH and acetone PLIF were collected at 10 kHz with the optical test bed. The modeling and experimental results informed the design of a TLUD prototype that met Tier 3 to Tier 4 specifications in emissions and Tier 2 in efficiency. The final prototype was field tested in India.« less

Authors:
 [1];  [1];  [1];  [1];  [2];  [2];  [3]
  1. Colorado State Univ., Fort Collins, CO (United States)
  2. Princeton Univ., Princeton, NJ (United States)
  3. Envirofit International, Fort Collins, CO (United States)
Publication Date:
Research Org.:
Colorado State Univ., Fort Collins, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Bioenergy Technologies Office (EE-3B)
OSTI Identifier:
1425656
Report Number(s):
DOE-CSU-6086-1
DOE Contract Number:
EE0006086
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; biomass cookstoves; gasifier cookstoves; efficiency; emissions

Citation Formats

Marchese, Anthony, DeFoort, Morgan, Gao, Xinfeng, Tryner, Jessica, Dryer, Frederick L., Haas, Francis, and Lorenz, Nathan. Achieving Tier 4 Emissions in Biomass Cookstoves. United States: N. p., 2018. Web. doi:10.2172/1425656.
Marchese, Anthony, DeFoort, Morgan, Gao, Xinfeng, Tryner, Jessica, Dryer, Frederick L., Haas, Francis, & Lorenz, Nathan. Achieving Tier 4 Emissions in Biomass Cookstoves. United States. doi:10.2172/1425656.
Marchese, Anthony, DeFoort, Morgan, Gao, Xinfeng, Tryner, Jessica, Dryer, Frederick L., Haas, Francis, and Lorenz, Nathan. Tue . "Achieving Tier 4 Emissions in Biomass Cookstoves". United States. doi:10.2172/1425656. https://www.osti.gov/servlets/purl/1425656.
@article{osti_1425656,
title = {Achieving Tier 4 Emissions in Biomass Cookstoves},
author = {Marchese, Anthony and DeFoort, Morgan and Gao, Xinfeng and Tryner, Jessica and Dryer, Frederick L. and Haas, Francis and Lorenz, Nathan},
abstractNote = {Previous literature on top-lit updraft (TLUD) gasifier cookstoves suggested that these stoves have the potential to be the lowest emitting biomass cookstove. However, the previous literature also demonstrated a high degree of variability in TLUD emissions and performance, and a lack of general understanding of the TLUD combustion process. The objective of this study was to improve understanding of the combustion process in TLUD cookstoves. In a TLUD, biomass is gasified and the resulting producer gas is burned in a secondary flame located just above the fuel bed. The goal of this project is to enable the design of a more robust TLUD that consistently meets Tier 4 performance targets through a better understanding of the underlying combustion physics. The project featured a combined modeling, experimental and product design/development effort comprised of four different activities: Development of a model of the gasification process in the biomass fuel bed; Development of a CFD model of the secondary combustion zone; Experiments with a modular TLUD test bed to provide information on how stove design, fuel properties, and operating mode influence performance and provide data needed to validate the fuel bed model; Planar laser-induced fluorescence (PLIF) experiments with a two-dimensional optical test bed to provide insight into the flame dynamics in the secondary combustion zone and data to validate the CFD model; Design, development and field testing of a market ready TLUD prototype. Over 180 tests of 40 different configurations of the modular TLUD test bed were performed to demonstrate how stove design, fuel properties and operating mode influences performance, and the conditions under which Tier 4 emissions are obtainable. Images of OH and acetone PLIF were collected at 10 kHz with the optical test bed. The modeling and experimental results informed the design of a TLUD prototype that met Tier 3 to Tier 4 specifications in emissions and Tier 2 in efficiency. The final prototype was field tested in India.},
doi = {10.2172/1425656},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Mar 13 00:00:00 EDT 2018},
month = {Tue Mar 13 00:00:00 EDT 2018}
}

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