Applied Mechanics and Materials Vols. 260-261

Abstract: 1,3-Butadiene is a chemical that is extremely flammable and toxic. Therefore, in this study, airborne quantity of 1, 3-butadiene was determined by the chemical exposure index (CEI) and local meteorological data were used for consequence analyzing. Furthermore, heavy gas model was used for the modeling of 1,3-butadiene vapor cloud dispersion using the Areal Locations of Hazardous Atmospheres (ALOHA) software, and threat zone in different stability classes was determined.

Abstract: Belt conveyors generally run at designed nominal speed. When material loading rate is smaller than the nominal conveying capacity the belt is under the situation of being partially filled. It provides the potential of reducing energy consumption by means of adjusting the speed of the belt. For practical reasons discrete control is preferred to adjust the belt speed. This paper presents a fuzzy control method to improve the energy efficiency of large-scale belt conveying systems. Fuzzy logic is applied to represent the change of material loading rate. A fuzzy control algorithm is developed to optimize the adjustment of belt speed to avoid potential material spillage and material overload caused by the short-term material loading peaks. Energy savingsareestimated by computer simulation. Simulation model and outputare verified by practical measurement.

Abstract: The vernacular architecture around the world, have considered many methods for creating better living conditions and welfare measures. Although it was difficult to work in harmony with cruel nature but wherever there is possibility of its use, the vernacular architecture takes advantage of nature. In Iran’s sustainable architecture there are much evidence of Persian architect’s genius and creativity in using nature to their advantage as: Wind catcher in hot and dry areas, Water storage scattered in many parts of Iran, The Yakhchal in depths of land for conservation and preservation of ice and their use in summer. Among them “Kat”, which is specialized in Dezfol and Shushtar of south-west of Iran, was made with certain conditions. In this paper, we studied on how to use “Kat” functional features in modern use in designing green Sidewalk. Based on these functions, a model for Sidewalk was created which will have a thermotical effect in Sidewalk. This model will keep the temperature over Sidewalk 4-5 degree less than other routes in summer.

Abstract: Building integrated-mounted wind turbine (BUWT) is one of the most promising renewable energy devices. However, this renewable energy technology is not fully spread principally due to two factors such as uncertainty in the prediction of wind velocity and high turbulence intensity around the building. In this work, the Taguchi method and the analysis of variance (ANOVA) on a horizontal-axis wind turbine has been applied, to study the influence of geometrical parameters such as building depth, width and height, as well as turbine position on the roof and turbine height. To evaluate the above-cited effects, the airflow around an isolated building of parametrical dimension has been simulated using a Computation Fluid Dynamic (CFD) code calibrated against experimental data in a previous paper from the authors. The results reported in the present paper outline the relative effects of the main building geometrical parameters on the performance of a rooftop installed wind turbine and establish basic guidelines for the optimal location of such turbines.

Abstract: The research intends to investigate the energetic performances of Organic Rankine Cycles (ORCs) for the exploitation of the biomass resulting from agricultural residues. To this purpose, a parametric analysis has been carried out. Saturated and superheated conditions at the turbine inlet have been imposed and the effect of the internal regeneration on plant performances has been studied. The results highlight that ORC plants represent an interesting and sustainable solution for small-scale and decentralised power production. Moreover, the analysis shows the significant impact of the temperature and internal regeneration technique on the performances of the biomass power plants.

Abstract: The cetyl \ octadecyl dimethyl tertiary amine（percentage composition 7:3）is a very common and inexpensive chemical raw material in the chemical market. In this paper, a series of the new chemical composite DSD acid-triazine structure containing long chain quaternary ammonium salt fluorescent brighteners (FBs) were synthesized through a three-step condensation reaction of cyanuric chloride, DSD acid, cetyl \ octadecyl dimethyl tertiary amine and amino compound. The obtained compounds were characterized by the analysis of the IR spectrum, UV spectrum and fluorescence excitation and emission spectrum, and whiteness were tested through dyeing filter paper. The results show that compounds 7a-j have the obvious UV absorption, fluorescence emission and dyeing properties, with a wider absorption, emission wavelength range and enhancing fluorescence quantum yield, achieving the synergetic enhancement effect by compounding.

Abstract: The doubly fed induction generator(DFIG) has been widely used in wind power generation system. It can alters speed of the rotor according to change of the wind speed, then contains the maximum tip speed ratio, in order to capture the maximum power from the wind energy. And the output frequency of the generator keeps constant ,so we call it VSCF. This paper studys simulation on maximum wind energy capturing of DFIG. The theory analysis and simulation results based on MATLAB/Simulink demonstrate this control strategy is convenient and efficient.

Abstract: An important feature of smart substation system is the communication of the various smart devices IED (Intelligent Electronic Digital), the network security issues become increasingly prominent with networked and standardized of the communication protocols, especially when IEC 61850 becoming development direction. In this paper, considered data and security communications standard of the power system IEC 62351’s safety authentication requirements, as well as limited storage and computing power of IED, a protocol used between IED safety authentication-Secure Remote Password SRP protocol is proposed . The research result help improve data security transmission and authentication of smart substation. It is provide with reference value to the implementation of IEC 62351 in smart substation.

Abstract: This article presents a new, multi-foil-blades (multi-S) rotor and compare its performance potentials with traditional (Single-S) Savomius rotor . Theoretical and experimental investigations show that the performance of the multi-S rotor is better than the other classical designs of Savonius rotor in terms of the resulting power factor. Analytical equations for power and torque factors are developed for both the single- and multi-S rotors with ideal flow assumed. These equations are proven very effective in describing the performance potentials of these rotors for a range of speed ratio less than or equals 0.7. This result is experimentally justified for both types of rotors. For speed ratios higher than 0.7, a remarkable deviation occurs between the theoretical performance measures provided by the developed equations and the experimentally measured ones. A geometric design parameter which depends on the internal construction of the proposed multi-S rotor is found to be of great impact on the attained power factor. A power factor for the multi-S rotor can be much more than that of a single-S one having the same height and outer size according to the chosen values of this design parameter.

Abstract: The ripples of the tsunami crisis in Japan triggered introspections of nuclear plant safety issues in the worldwide. Many countries have claimed the suspension of nuclear power plants. However, some countries such as Taiwan, under nearly 99% energy is exported, the disasters force government and citizen to face the importance of nuclear safety, especially the neighborhoods nearby the nuclear power plants. We have to face the nuclear safety since there is no other alternative energy presently. The 3rd nuclear power plant located in the south of Taiwan, which has the same geographic features with Fukushima, Japan. Presently, there is no precedent in Taiwan of precaution and rescue team and civil supervised mechanic on nuclear security issue. This paper will review according to transparent information, public participation and cross-organization cooperation to propose the execution and work division principles, including information monitor, educational propagation, hide and evacuation, emergence aid and care, rear and refuge service. The ultimate target is to establish self-governance inside nearby neighborhood to confront nuclear disaster at the critical moment.