A liquid-solid fluidized bed separator, used for the separation of coarse slime, was developed. Test parti- cles sized in the range from 0.25 to 0.5, 0.5 to 1.0, and 0.25 to 1.0 mm were separated in the liquid-solid f...
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A liquid-solid fluidized bed separator, used for the separation of coarse slime, was developed. Test parti- cles sized in the range from 0.25 to 0.5, 0.5 to 1.0, and 0.25 to 1.0 mm were separated in the liquid-solid fluidized bed. Beds with column heights of 1200, 1500, and 1800 mm were tried. The clean coal and the railings were subsequently analyzed by float-sink testing. The results showed that the ash and yield of clean coal both decreased with increasing column height, for all three size fractions, and that the ash of the clean coal obtained from tests on the broader size fraction was less than that from the narrower sized fractions. The separation density decreased with increasing column height. The lowest E value was seen for a column height of 1500 ram, for which conditions the separation density was 1.45 g/cm3. The E value was 0.084 for the 0.25-0.5 mm fraction but the corresponding separation density was 1.48 g/cm3, and the E value 0.089, for the broader 0.25-1.0 mm fraction.
Nucleate pool boiling heat transfer of micro-pin-fined surface structure is proposed for efficiently cooling electronic components with high heat flux in microgravity,and verified by experiments performed utilizing th...
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Nucleate pool boiling heat transfer of micro-pin-fined surface structure is proposed for efficiently cooling electronic components with high heat flux in microgravity,and verified by experiments performed utilizing the drop tower ***-pin-fins with the dimensions of 50μm×120(am （thickness×height）(denoted as Chip PF50-120) and the space of 50μm were fabricated on the chip surface by dry etching ***-72 was used as working *** pool boiling on a smooth surface was also tested for *** were conducted in terrestrial gravity before the release of the drop capsule and in short-term microgravity during the free falling in the drop tower Beijing. The facility satisfied the safety criteria to expose the apparatus in the drop capsule to different gravitational environments varying between microgravity（μg）(10-10 g,g=9.81 m/s) in the free falling period and high-g level in the deceleration recovery system（16 go）.
Experiments on pyrolysis of Chinese Fugu coal were carried out with a downer reactor, and the effects of temperature and coal feeding rate on product distribution were investigated. It was found that the gas yield inc...
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We use non-equilibrium molecular dynamics simulations to calculate the self-diffusion coefficient, D, of a Lennard Jones fluid over a wide density and temperature range. The change in self-diffusion coefficient with t...
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We use non-equilibrium molecular dynamics simulations to calculate the self-diffusion coefficient, D, of a Lennard Jones fluid over a wide density and temperature range. The change in self-diffusion coefficient with temperature decreases by increasing density. For density ρ＊ = ρσ3 = 0.84 we observe a peak at the value of the self-diffusion coefficient and the critical temperature T＊ = kT/ε = 1.25. The value of the self-diffusion coefficient strongly depends on system size. The data of the self-diffusion coefficient are fitted to a simple analytic relation based on hydrodynamic arguments. This correction scales as N-α, where α is an adjustable parameter and N is the number of particles. It is observed that the values of a 〈 1 provide quite a good correction to the simulation data. The system size dependence is very strong for lower densities, but it is not as strong for higher densities. The self-diffusion coefficient calculated with non-equilibrium molecular dynamic simulations at different temperatures and densities is in good agreement with other calculations fronl the literature.
Aiming at rendezvous path planning of free floating space robot(the chaser satellite) in outer space, the path planning method to ensure safe approaching the non-cooperative space target based on the orbit mechanical ...
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A process simulation model of CFB coal decoupling combustion process has been developed based on Aspen Plus and verified by comparing with the reported NO and N2O emissions from experiments. The detailed information o...
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Boiling is a very complex and illusive process with very high efficiency of heat *** many sub-processes in boiling phenomenon,gravity can be involved and play much important *** reveal its influence,long-term,steady m...
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Boiling is a very complex and illusive process with very high efficiency of heat *** many sub-processes in boiling phenomenon,gravity can be involved and play much important *** reveal its influence,long-term,steady microgravity are ***,the opportunity is much ***,ground-based short-term microgravity experiment becomes an attractive alternative. Experiments of transient pool boiling of highly subcooled FC-72 on a smooth silicon chip with the dimensions of 10×10x0.5 mm3 were studied in short-term microgravity condition utilizing the drop tower *** heating currents were switched on near the release of the drop *** bubble behaviors and heat transfer of air-dissolved FC-72 on the silicon chip were obtained at the bulk
An empirical corrosion model for SS316L in simulated proton exchange membrane fuel cell (PEMFC) environments is developed based on systematic experimental data on the effects of various factors, such as acidity, fluor...
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