The effects of particle size, impeller clearance and impeller speed are assessed to show how condition variations influence power consumption in the water-solid slurry suspension in an agitated tank. The energy effici...The effects of particle size, impeller clearance and impeller speed are assessed to show how condition variations influence power consumption in the water-solid slurry suspension in an agitated tank. The energy efficiency of slurry height variation, impeller type and diameter, and solid movement speed has been investigated with six soil series stirred in a soil-water slurry. Coarser sand particles are observed to significantly increase power consumption, while finer particles, for instance clay, decrease the stirring power requirement. The 3-blade HR100 SUPERMIX? impeller manufactured by SATAKE generally performs more efficiently than a conventional4-pitched blade turbine. The impeller's geometric design, including diameter and number of blades influences the impeller's energy efficiency, and HR100 impellers with greater diameters remarkably reduce power consumption. The tests demonstrated that the power required to provide off-bottom solid suspension and solid dispersion can be reduced dramatically by increasing the slurry height rather than by accelerating the impeller, if this option is possible.展开更多
Assuming the heterogeneity of different industries, this paper, using time series data of years from 1980 to 2008 to empirically testify the direct &indirect as well as the long & short term shocks from energy...Assuming the heterogeneity of different industries, this paper, using time series data of years from 1980 to 2008 to empirically testify the direct &indirect as well as the long & short term shocks from energy price on energy efficiency of the tertiary industry in P. R. China, concludes that the rise of energy prices can significantly reduce the energy intensity in China's tertiary industry in the short and long run. Meanwhile, indirectly, energy price increase also exerts strong influence on the tertiary industry energy efficiency via the channel of coal consumption ratio change in the tertiary industry; namely, the higher energy price leads to more coal consumption, thus enhancing the energy efficiency as well.展开更多
基金the Government of Malaysia for the financial support from University of Malaya through the UMRG grant no. RP008B-13SUSMinistry of Higher Education (MOHE) through the FRGS grant no. FP028-2012A
文摘The effects of particle size, impeller clearance and impeller speed are assessed to show how condition variations influence power consumption in the water-solid slurry suspension in an agitated tank. The energy efficiency of slurry height variation, impeller type and diameter, and solid movement speed has been investigated with six soil series stirred in a soil-water slurry. Coarser sand particles are observed to significantly increase power consumption, while finer particles, for instance clay, decrease the stirring power requirement. The 3-blade HR100 SUPERMIX? impeller manufactured by SATAKE generally performs more efficiently than a conventional4-pitched blade turbine. The impeller's geometric design, including diameter and number of blades influences the impeller's energy efficiency, and HR100 impellers with greater diameters remarkably reduce power consumption. The tests demonstrated that the power required to provide off-bottom solid suspension and solid dispersion can be reduced dramatically by increasing the slurry height rather than by accelerating the impeller, if this option is possible.
文摘Assuming the heterogeneity of different industries, this paper, using time series data of years from 1980 to 2008 to empirically testify the direct &indirect as well as the long & short term shocks from energy price on energy efficiency of the tertiary industry in P. R. China, concludes that the rise of energy prices can significantly reduce the energy intensity in China's tertiary industry in the short and long run. Meanwhile, indirectly, energy price increase also exerts strong influence on the tertiary industry energy efficiency via the channel of coal consumption ratio change in the tertiary industry; namely, the higher energy price leads to more coal consumption, thus enhancing the energy efficiency as well.
