Estimation of heat transfer coefficients for biomass particles by direct numerical simulation using microstructured particle models in the Laminar regime
Abstract
Here, direct numerical simulation of convective heat transfer from hot gas to isolated biomass particle models with realistic morphology and explicit microstructure was performed over a range of conditions with laminar flow of hot gas (500 degrees C). Steady-state results demonstrated that convective interfacial heat transfer is dependent on the wood species. The computed heat transfer coefficients were shown to vary between the pine and aspen models by nearly 20%. These differences are attributed to the species-specific variations in the exterior surface morphology of the biomass particles. We also quantify variations in heat transfer experienced by the particle when positioned in different orientations with respect to the direction of fluid flow. These results are compared to previously reported heat transfer coefficient correlations in the range of 0.1 < Pr < 1.5 and 10 < Re < 500. Comparison of these simulation results to correlations commonly used in the literature (Gunn, Ranz-Marshall, and Bird-Stewart-Lightfoot) shows that the Ranz-Marshall (sphere) correlation gave the closest h values to our steady-state simulations for both wood species, though no existing correlation was within 20% of both species at all conditions studied. In general, this work exemplifies the fact that all biomass feedstocks are not createdmore »
- Authors:
-
- National Renewable Energy Lab. (NREL), Golden, CO (United States); Washington State Univ., Pullman, WA (United States)
- Washington State Univ., Pullman, WA (United States)
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Publication Date:
- Research Org.:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Sustainable Transportation Office. Bioenergy Technologies Office (BETO)
- OSTI Identifier:
- 1339243
- Report Number(s):
- NREL/JA-2700-67424
Journal ID: ISSN 2168-0485
- Grant/Contract Number:
- AC36-08GO28308
- Resource Type:
- Accepted Manuscript
- Journal Name:
- ACS Sustainable Chemistry & Engineering
- Additional Journal Information:
- Journal Volume: 5; Journal Issue: 1; Journal ID: ISSN 2168-0485
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 09 BIOMASS FUELS; biomass; pyrolysis; heat transfer coefficient; particle modeling; direct numerical simulation
Citation Formats
Pecha, M. Brennan, Garcia-Perez, Manuel, Foust, Thomas D., and Ciesielski, Peter N. Estimation of heat transfer coefficients for biomass particles by direct numerical simulation using microstructured particle models in the Laminar regime. United States: N. p., 2016.
Web. doi:10.1021/acssuschemeng.6b02341.
Pecha, M. Brennan, Garcia-Perez, Manuel, Foust, Thomas D., & Ciesielski, Peter N. Estimation of heat transfer coefficients for biomass particles by direct numerical simulation using microstructured particle models in the Laminar regime. United States. https://doi.org/10.1021/acssuschemeng.6b02341
Pecha, M. Brennan, Garcia-Perez, Manuel, Foust, Thomas D., and Ciesielski, Peter N. Tue .
"Estimation of heat transfer coefficients for biomass particles by direct numerical simulation using microstructured particle models in the Laminar regime". United States. https://doi.org/10.1021/acssuschemeng.6b02341. https://www.osti.gov/servlets/purl/1339243.
@article{osti_1339243,
title = {Estimation of heat transfer coefficients for biomass particles by direct numerical simulation using microstructured particle models in the Laminar regime},
author = {Pecha, M. Brennan and Garcia-Perez, Manuel and Foust, Thomas D. and Ciesielski, Peter N.},
abstractNote = {Here, direct numerical simulation of convective heat transfer from hot gas to isolated biomass particle models with realistic morphology and explicit microstructure was performed over a range of conditions with laminar flow of hot gas (500 degrees C). Steady-state results demonstrated that convective interfacial heat transfer is dependent on the wood species. The computed heat transfer coefficients were shown to vary between the pine and aspen models by nearly 20%. These differences are attributed to the species-specific variations in the exterior surface morphology of the biomass particles. We also quantify variations in heat transfer experienced by the particle when positioned in different orientations with respect to the direction of fluid flow. These results are compared to previously reported heat transfer coefficient correlations in the range of 0.1 < Pr < 1.5 and 10 < Re < 500. Comparison of these simulation results to correlations commonly used in the literature (Gunn, Ranz-Marshall, and Bird-Stewart-Lightfoot) shows that the Ranz-Marshall (sphere) correlation gave the closest h values to our steady-state simulations for both wood species, though no existing correlation was within 20% of both species at all conditions studied. In general, this work exemplifies the fact that all biomass feedstocks are not created equal, and that their species-specific characteristics must be appreciated in order to facilitate accurate simulations of conversion processes.},
doi = {10.1021/acssuschemeng.6b02341},
journal = {ACS Sustainable Chemistry & Engineering},
number = 1,
volume = 5,
place = {United States},
year = {Tue Nov 08 00:00:00 EST 2016},
month = {Tue Nov 08 00:00:00 EST 2016}
}
Web of Science
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Works referencing / citing this record:
Advancing catalytic fast pyrolysis through integrated multiscale modeling and experimentation: Challenges, progress, and perspectives
journal, April 2018
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