Papers by Chang-Bin Huang
Numerical simulation of the oxygen-blown coal gasification process inside a cross-type two-stage ... more Numerical simulation of the oxygen-blown coal gasification process inside a cross-type two-stage (E-Gas like) gasifier is studied with the commercial CFD solver ANSYS FLUENT. The purpose of this study is to use CFD simulation to improve understanding of the gasification processes in the E-Gas like gasifier. In this paper, chemical reaction time is assumed to be faster than the time scale of the turbulence eddies. All the species are assumed to mix in the intermolecular level. The 3-D Navier-Stokes equations and species transport equations are solved with the eddy-breakup reaction model (instantaneous gasification). The influences of coal slurry concentration and O2/coal ratio on the gasification process are investigated. Under the condition of feeding carbon being almost completely converted, low slurry concentration is preferred over high concentration if more H2 is wanted with lower syngas temperature; while higher slurry concentration is preferable for producing more CO with high...
Taiwan was the first country in Asia to announce "Nuclear-Free Homeland" in 2002. In 20... more Taiwan was the first country in Asia to announce "Nuclear-Free Homeland" in 2002. In 2008, the new government released the Sustainable Energy Policy Guidelines to lower the nationwide CO2 emissions some time between 2016 and 2020 back to the level of year 2008, further abatement of CO2 emissions is planed in year 2025 when CO2 emissions will decrease to the level of year 2000. Besides, under consideration of the issues of energy, environment and economics (3E), the new government declared that the nuclear power is a carbon-less energy option. This study analyses the effects of nuclear power generation for CO2 abatement scenarios in Taiwan. The MARKAL-MACRO energy model was adopted to evaluate economic impacts and energy deployment due to life extension of existing nuclear power plants and build new nuclear power units in CO2 abatement scenarios. The results show that CO2 abatement effort is expensive. On the other hand, nuclear power is a cost-effective choice. The GDP los...
Journal of Marine Science and Technology, 2007
Aerosol dynamic behavior in a turbulent flow field is investigated in this study. The flow field ... more Aerosol dynamic behavior in a turbulent flow field is investigated in this study. The flow field is a natural convection boundary layer flow adjacent to a heated or cooled vertical flat plate. The main computational method is based on a boundary layer type solution combining the flow field and sectional aerosol simulation. The SIMPLE alogrithm is adopted to solve the flow continuity, momentum, energy, and aerosol concentration equations. Various aerosol dynamic transport and removal mechanisms, including fluid convection, Brownian motion, gravitational settling, thermophoretic drift, and coagulation of aerosols, are considered in the simulation model. Aerosol coagulation effects on particle transport and deposition onto an isothermal vertical plate are addressed.
Journal of Marine Science and Technology, 2006
This work combines thermal and structural analyses to study the effect of fire on the elastic mod... more This work combines thermal and structural analyses to study the effect of fire on the elastic modulus of reinforced concrete beams. The thermal analysis uses the finite difference method to model the temperature distribution of a reinforced concrete beam maintained at high temperature. The structural analysis, using the lumped method, is utilized to calculate the effective elastic modulus of reinforced concrete beams. The results of the thermal analysis are compared to the experimental results in the literature, and the analytically derived structural results are also compared with experimental data on the flexural behaviors of RC beams exposed to fire. The predicted and experimental temperature distribution in the concrete beam and deformation in the structural model agree with each other. The findings provide important information on the flexural behavior of BC beams exposed to fire.
Long-term CO2 reduction target and scenarios of power sector in Taiwan
2nd IAEE Asian …, 2008
... Fu-Kuang Ko, Chang-Bin Huang*, Pei-Ying Tseng, Chung-Han Lin, Bo-Yan Zheng, Hsiu-Mei Chiu ...... more ... Fu-Kuang Ko, Chang-Bin Huang*, Pei-Ying Tseng, Chung-Han Lin, Bo-Yan Zheng, Hsiu-Mei Chiu ... 11% were from oil-fired power plants, 12% were from nuclear power plants, 6% were from renewable power plants, and 6% came from pump-storage power plants [Hung, 2006]. ...
Long-term CO 2 emissions reduction target and scenarios of power sector in Taiwan
Energy Policy - ENERG POLICY, 2010
This study analyses a series of carbon dioxide (CO2) emissions abatement scenarios of the power s... more This study analyses a series of carbon dioxide (CO2) emissions abatement scenarios of the power sector in Taiwan according to the Sustainable Energy Policy Guidelines, which was released by Executive Yuan in June 2008. The MARKAL-MACRO energy model was adopted to evaluate economic impacts and optimal energy deployment for CO2 emissions reduction scenarios. This study includes analyses of life extension of nuclear power plant, the construction of new nuclear power units, commercialized timing of fossil fuel power plants with CO2 capture and storage (CCS) technology and two alternative flexible trajectories of CO2 emissions constraints. The CO2 emissions reduction target in reference reduction scenario is back to 70% of 2000 levels in 2050. The two alternative flexible scenarios, Rt4 and Rt5, are back to 70% of 2005 and 80% of 2005 levels in 2050. The results show that nuclear power plants and CCS technology will further lower the marginal cost of CO2 emissions reduction. Gross domest...
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Papers by Chang-Bin Huang