Numerical study of fluid dynamics and heat transfer property of dual fluidized bed gasifier

Energy ◽  
2021 ◽  
pp. 121246
Author(s):  
Feihu Fan ◽  
Min Zheng ◽  
Shiliang Yang ◽  
Hua Wang
Keyword(s):  
Heat Transfer ◽  
Fluid Dynamics ◽  
Fluidized Bed ◽  
Numerical Study ◽  
Transfer Property ◽  
Heat Transfer Property ◽  
Dual Fluidized Bed ◽  
Fluidized Bed Gasifier

Simulation of a pilot-scale dual-fluidized-bed gasifier for biomass

2014 ◽  
Vol 33 (3) ◽  
pp. 732-736 ◽  
Author(s):  
Chang-hsien Liao ◽  
Matthew Summers ◽  
Reinhard Seiser ◽  
Robert Cattolica ◽  
Richard Herz
Keyword(s):  
Fluidized Bed ◽  
Pilot Scale ◽  
Dual Fluidized Bed ◽  
Fluidized Bed Gasifier

scholarly journals Preparation of Hollow Silica by Spray Drying of Nano Silica Particles and Its Heat Transfer Property

2012 ◽  
Vol 22 (10) ◽  
pp. 531-538 ◽  
Author(s):  
Chan Ki Youn ◽  
Hyung Mi Lim ◽  
Sujin Cha ◽  
Dae Sung Kim ◽  
Seung-Ho Lee
Keyword(s):  
Heat Transfer ◽  
Spray Drying ◽  
Silica Particles ◽  
Nano Silica ◽  
Transfer Property ◽  
Hollow Silica ◽  
Heat Transfer Property

Experimental and Numerical Study of Cold Gas-Solid Flow Regimes in a Fluidized Bed Gasifier

2017 ◽  
Author(s):  
Anton Pylypenko ◽  
Yevgenii Rastigejev ◽  
Lijun Wang ◽  
Abolghasem Shahbazi
Keyword(s):  
Fluidized Bed ◽  
Numerical Study ◽  
Three Dimensional ◽  
Operating Conditions ◽  
Silica Sand ◽  
State University ◽  
Solid Flow ◽  
Fluidized Bed Gasifier ◽  
Isothermal Gas ◽  
Cold Gas

The objective of this work is to analyze the dynamics and regimes of cold gas-solid flow in a biomass gasifier that is built at North Carolina Agricultural and Technical State University and to identify its corresponding ranges of operating conditions. The value of the minimum fluidization velocity Umf ≈ 8 cm/s has been found experimentally in a series of measurements of a pressure drop in the fluidized bed filled with Gledart type-B silica sand for the range of superficial gas velocities between 0 and 40 cm/s. To complement the experimental results, a set of three-dimensional numerical simulations of the isothermal gas-solid flow based on Eulerian-Eulerian approach has been performed. The analysis of the fluidization characteristics such as axial void fraction distributions has allowed us to evaluate the dependence of the bed expansion ratios from the flow superficial velocity. Good agreement between experimental and numerical results for the considered operating conditions of the gasifier has been observed.

Characterization of a dual fluidized bed gasifier with blended biomass/coal as feedstock

2018 ◽  
Vol 254 ◽  
pp. 97-106 ◽  
Author(s):  
Linbo Yan ◽  
Yang Cao ◽  
Xuezheng Li ◽  
Boshu He
Keyword(s):  
Fluidized Bed ◽  
Dual Fluidized Bed ◽  
Fluidized Bed Gasifier

Biomass Gasification in Dual Fluidized Bed Gasifier

2007 ◽  
pp. 1213-1217 ◽  
Author(s):  
Toshiyuki Suda ◽  
Takahiro Murakami ◽  
Satoko Aoki ◽  
Yoshiaki Matsuzawa ◽  
Guangwen Xu ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Biomass Gasification ◽  
Dual Fluidized Bed ◽  
Fluidized Bed Gasifier

scholarly journals Analyzing the Heat Transfer Property of Heat Pipe Influenced by Integrated Cooling Apparatus

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Chen-Ching Ting ◽  
Chien-Chih Chen
Keyword(s):  
Heat Transfer ◽  
Thermal Conductivity ◽  
Heat Pipe ◽  
Cooling Water ◽  
Cooling Power ◽  
Capillary Structure ◽  
Transfer Property ◽  
Face To Face ◽  
Heat Transfer Property ◽  
Circulating Cooling Water

Heat pipe with discrete heat transfer property is often called thermal superconductor because it has extremely large thermal conductivity. This special heat transfer property is destroyed by integrating cooling apparatus and further reducing the cooling power of a heat pipe cooler. This paper experimentally studied the heat transfer property of heat pipe influenced by integrated cooling apparatus. To simplify the investigating process, a home-made square heat pipe with the dimensions of L×W×H=10×10×100 mm3 was built with two pieces of copper plates and two pieces of glass plates face to face, respectively. The two pieces of copper plates were constructed with inside walls of capillary structure and the two pieces of glasses were with antifog inside walls for observing the inner phenomenon. Moreover, isothermal circulating cooling water was applied outside the heat pipe instead of cooling fin. The results show that heat vapor in the heat pipe is condensed earlier and cannot reach the remote section of condenser. In other words, the heat transfer property of heat pipe is destroyed by integrating cooling water. This phenomenon causes the unfavorable cooling power of the heat pipe cooler.

Simulation Study on Heat Insulating Material Used in Refrigerated Cargo Hold Shipboard of Fishing Vessel

2011 ◽  
Vol 311-313 ◽  
pp. 1953-1956
Author(s):  
Jing Fu Jia ◽  
Wei He
Keyword(s):  
Heat Transfer ◽  
Three Dimensional ◽  
Heat Transfer Process ◽  
Transfer Model ◽  
Fishing Vessel ◽  
Transfer Property ◽  
Insulating Material ◽  
Temperature Distributions ◽  
Heat Transfer Property ◽  
Computational Fluid Dynamics Cfd

To choose the suitable heat insulating material for refrigerated cargo hold shipboard of fishing vessel, a steady state three-dimensional mathematical model of heat transfer is developed in this paper. The heat-transfer model is simplified reasonably in order to facilitate analyzing and solving. After defining the boundary conditions of the model according to the heat-transfer process of the shipboard, numerical simulations with different heat insulating material are performed using computational fluid dynamics (CFD) software PHOENICS. The obtained temperature distributions of the model in each case are analyzed. The suitable one is pointed out according to the degree of influence of the heat insulating material on heat-transfer property of the shipboard.

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