Applied Mechanics and Materials Vols. 71-78

Abstract: In order to evaluate the particle exposure level of people indoor, and to improve indoor air quality, research for the particle distribution in residential kitchen is important. In this paper, a residential kitchen is investigated numerically, and the spread and distribution of particles are simulated detailed using the mixture two-phase model. We focused on the particles transportation in different ventilation methods. The four different conditions are designed for simulating the two-phase flow pattern, and the results of particle concentration of different ventilation methods and different particles diameters are obtained. The simulating results are beneficial for increasing the particle removal efficiency and the design of reasonable ventilation methods.

Abstract: To obtain the ultra-low interfacial tension foam flooding system for the real reservoir condition of high-temperature and high-salinity, foam properties and dynamic interfacial tension had been performed by Ross-miles test and spin drop tension meter respectively. Ten types of surfactants were screened by foamability, stability and interfacial tension (IFT) at 85°C, high-salinity with 800 mg/L divalent cations and 30000 mg/L total mineralization. The AOS, AESO and 20YB were selected to compose further anion-nonionic mixture system. Due to AOS had excellent foam properties, AESO could achieve low interfacial tension and 20YB could improve the film quality. Through series complex study, the ultra-low interfacial tension (10^-4 mN/m order of magnitude) foam system was obtained with the composition of 0.15% wt AOS+0.15% wt AESO+0.11%~0.012% wt 20YB for high-temperature and high-salinity, which V foam was 240-235 mL and t _0.5 was 180-190 min. In addition, the synergistic effect of these surfactants had been described.

Abstract: The removal of phenol wastewater was experimentally investigated using a three-dimensional electrode reactor with granular activated carbon and titanium filter electrode arrays. The effects of the electric current, the residence time and the initial concentration on the phenol removal were evaluated. For the initial concentration of 490 mg/L, the phenol removal was obtained as 90% under the conditions of electric current 2 A, residence time 40 min. The effluent path of the electrochemical cell was optimized, using the anode effluent instead of the top effluent, where the phenol and COD removal was both increased to 95% and the corresponding energy consumption was decreased from 9.66 to 7.63 kWh/kg COD.

Abstract: The chromogenic reaction of Al (III) with morin was studied in the presence of cationic surfactant cetyltrimethylammonium bromide(CTMAB), Al (III) was capable of reacting with morin to form a stable yellow complex in 0.17 mol l^-1 glacial acetic acid media. The complex had a 1∶2 molar ratio for Al (III) and morin . In the presence of cationic surfactant CTMAB, the sensitivity of chromogenic reaction was largely improved. At the maximum absorption wavelength of 425nm, the apparent molar absorptivity was 1. 59×10⁵l·mol ^{- 1}·cm^{- 1} .Beer′s law was obeyed in the range of 0 to 8μg/ 25ml Al (III) . The method has been applied successfully to the determination of trace amount of aluminium in tap and river water samples.

Abstract: This study analyzes the effects of technological progress for the elasticity of energy consumption from 2002 to 2030 in China by a dynamic computable general equilibrium model. The technological progress is represented by a combination of industrial technology upgrading and energy efficiency improvement. Household is divided into two groups as rural type and urban type. The parameters about technological progress and urbanization are all introduced exogenously. Simulation results show that vigorously pushing advanced energy efficiency technologies through financial policy incentives is the key to realize effective energy-saving achievement while promoting economic growth in China.

Abstract: The Ni-B amorphous alloy catalyst with uniform particle was prepared by chemical reduction the nickel ethylenediamine complex over ultrasonic-assisted. The catalyst was characterized by XRD, TEM and H₂-TPD techniques, and then evaluated activity by hydrogenation of glucose. Compared with the conventional Ni-B catalyst, the as-prepared Ni-B catalyst exhibited much higher catalytic activity. The results could be attributed to the higher dispersion, the stronger adsorption of hydrogen and the less aggregation of Ni active sites, which mostly result from the formation of the nickel complex and the effect of ultrasonic cavitation.

Abstract: The removal efficiency of COD_Cr and ammonia nitrogen of the high concentration of ammonia nitrogen from tannery effluent by membrane bioreactor (MBR) was investigated. The results showed that when the operation of MBR is stable, influent COD_Cr loads are less than 4.8 kg/m³•d, the average removal rate of COD_Cr was over 88%, the removal rate of ammonia nitrogen reached to 90%; when dissolved oxygen (DO) was 1.2mg/L and 1.8 mg/L, the reactor still has excellent treatment efficiency, and the removal rate of COD_Cr and ammonia nitrogen can achieved over 90%. In addition, through the study of membrane flux, it is easy to find that membrane flux decreases rapidly, the membrane requires periodic cleansing.

Abstract: Because of the energy crisis and the low proportion of new buildings in Taiwan, rational use of electricity in existing buildings becomes very important for reducing carbon emissions and combating global climate change. The retrofitting of lighting systems is one of the most widely adopted energy saving measures. This study presents the potential energy saving and payback period of lighting system retrofit through replacing low performance T8 fluorescents with T5 fluorescents and LED indicator lights in the Green Building Renovation Plan. Based on the analysis, this study concludes that lighting system retrofit can achieve significant energy saving ratios of 10-17.5% in daily use. However, the average payback periods of GBRP investment and normal purchase investment are ten years and 7.82 years, respectively. Both exceed the average lifetime of lighting equipment, suggesting that lighting system retrofit is slightly uneconomical because of the low electricity tariff in Taiwan.

Abstract: The vortex process generated Mechanical energy; this is produced when heat is carried upward by convection in the atmosphere. Processes for controlling and concentrating where the mechanical energy is produced could be a method of harnessing solar energy and the wind movement, but this process it’s more efficient that Wind turbines that these can only produce electricity when the speed of the oncoming wind is within certain limits. The vortex process is compared with the solar chimney phenomenon which shares the same thermodynamic basis. The physical tube of the solar chimney is replaced with a vortex and the atmospheric boundary layer acts as the solar collector. The reasons for this paper its give another option in generation of cleaner energy and also innovating power generation industry. This template explains and demonstrates how to prepare your camera-ready paper for Trans Tech Publications. The best is to read these instructions and follow the outline of this text.

Abstract: In the alluvial coal pillar mining process, aiming at water prevention and cure, surrounding rock support, construction technology, safety management and the other main factors of safety mining, and through constant practice, the paper summarized the special measures of rock control on safety mining of alluvium coal pillar in the complex conditions for ensure safe of working face in alluvium corner coal, efficient mining, improve resource recovery. The economic and social effectiveness is remarkable.