E223 Numerical Simulation of the thermal conduction of packed bed of woody biomass particles induced by pyrolysis

2010 ◽  
Vol 2010 (0) ◽  
pp. 327-328
Author(s):  
Ken-ichiro Tanoue ◽  
Widya Wijanti ◽  
Tatsuo Nishimura ◽  
Miki Taniguchi ◽  
Ken-ichi Sasauchi
Keyword(s):  
Numerical Simulation ◽  
Thermal Conduction ◽  
Woody Biomass ◽  
Packed Bed ◽  
Biomass Particles

scholarly journals Numerical Simulation of the Thermal Conduction of Packed Bed of Woody Biomass Particles Accompanying Volume Reduction Induced by Pyrolysis

2010 ◽  
Vol 89 (10) ◽  
pp. 948-954 ◽  
Author(s):  
Ken-ichiro TANOUE ◽  
Widya WIJAYANTI ◽  
Kei YAMASAKI ◽  
Takashi KAWANAKA ◽  
Atsushi YOSHIDA ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Thermal Conduction ◽  
Woody Biomass ◽  
Packed Bed ◽  
Volume Reduction ◽  
Biomass Particles

scholarly journals A Relationship between the Formation Rate of Solid Component and Volume Reduction of Packed Bed of Woody Biomass Particles during Pyrolysis

2011 ◽  
Vol 90 (11) ◽  
pp. 1031-1037 ◽  
Author(s):  
Ken-ichiro TANOUE ◽  
Kei YAMASAKI ◽  
Tatsuo NISHIMURA ◽  
Miki TANIGUCHI ◽  
Ken-ichi SASAUCHI
Keyword(s):  
Formation Rate ◽  
Woody Biomass ◽  
Packed Bed ◽  
Volume Reduction ◽  
Solid Component ◽  
Biomass Particles

scholarly journals Thermal Conduction and Gas Generation Undergoing Pyrolysis in the Packed Bed of Woody Biomass

2012 ◽  
Vol 91 (10) ◽  
pp. 976-984 ◽  
Author(s):  
Ken-ichiro TANOUE ◽  
Takahiro SUETOMI ◽  
Tatsuo NISHIMURA ◽  
Miki TANIGUCHI ◽  
Ken-ichi SASAUCHI
Keyword(s):  
Thermal Conduction ◽  
Woody Biomass ◽  
Packed Bed ◽  
Gas Generation

Numerical Simulation of Accident Scenario in High Temperature Gas Cooled (Pebble Bed) Nuclear Reactors

2012 ◽  
Author(s):  
Geoffrey J. Peter
Keyword(s):  
Numerical Simulation ◽  
High Temperature ◽  
Boundary Conditions ◽  
Nuclear Reactors ◽  
Numerical Study ◽  
Packed Bed ◽  
Pebble Bed ◽  
Accident Scenario ◽  
Set Up ◽  
High Temperature Gas

The accident scenario resulting from blockages due to the retention of dust in the coolant gas or from the rupture of one or more fuel particles used in the High Temperature Gas Cooled (Pebble Bed) Nuclear Reactors considered for the next generation of Advanced High Temperature Reactors (AHTR), for nuclear power production, and for high-temperature hydrogen production using nuclear reactors to reduce the carbon footprint is examined in this paper. Blockages can cause local variations in flow and heat transfer that may lead to hot spots within the bed that could compromise reactor safety. Therefore, it is important to know the void fraction distribution and the interstitial velocity field in the packed bed. The blockage for this numerical study simulated a region with significantly lower void than that in the rest of the bed. Finite difference technique solved the simplified continuity, momentum, and energy equations. Any meaningful outcome of the solution depended largely upon the validity of the boundary conditions. Among them, the inlet and outlet velocity profiles required special attention. Thus, a close approximation to these profiles obtained from an experimental set-up established the boundary conditions. This paper presents the development of the elliptic-partial differential equation for a bed of pebbles, and the solution procedure. The paper also discusses velocity and temperature profiles obtained from both numerical and experimental setup, with and without effect of blockage. In addition, the paper compares the results obtained from the experimental set-up with numerical simulation using a commercially available code that uses finite element techniques.

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