欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
超临界水流化床是应用于生物质气化制氢工程的新型反应器。为了获得超临界水流化床内流体与颗粒的传热特性，本文对超临界水条件下单颗粒绕流传热进行数值模拟研究，并与经验关联式进行比较，验证了模型的有效性。研究结果表明变物性条件下努塞尔数比常物性条件下大，重力对低雷诺数条件下颗粒绕流传热影响较大，当绕流在球形颗粒后出现尾涡时，重力对尾涡部分传热有抑制效果。这些结论为进一步研究超临界水流化床内传热奠定了基础。
英文摘要：
SCWFBR （supercritical water fluidized bed reactor）, which was used to gasify biomass and produce hydrogen gas, is a new member of fluidized bed family. In order to investigate heat transfer between supercritical water and single particle, numerical studies have been conduced for fist time. By comparing with experimental correlation, the model used in this work was proved to be valid. The study shows that variable properties affect on drag coefficient and Nusselt number greatly. Buoyancy force by gravity enhances heat transfer from the surface before sepa- ration point of particle to fluid, but decreases the heat transfer from the surface after separation point of particle to fluid wave. Those results are helpful for further studying heat transfer in SCWFBR.
同期刊论文项目
同项目期刊论文
Hydrogen production by biomass gasification in supercritical water over Ni/gamma Al(2)O(3) and Ni/Ce
Technical and economic evaluation of solar hydrogen production by supercritical water gasification o
Hydrogen production by biomass gasification in supercritical water with bimetallic Ni-M/gamma Al(2)O
Hydrogen Production by Supercritical Water of Biomass: Particle and Residence Time Distribution in F
期刊信息
位置：