Applied Mechanics and Materials Vol. 835

Abstract: In this article, we simply design the solar tracking system and construct a solar collector system for year 2015 in Bangkok, Thailand. The analytical model is calculated via altitudes and azimuth angles of the sun. Our experimental result is agreement well with the calculation in terms of altitude and azimuth. This solar tracking system is therefore applied to a dish solar collector showing the thermal energy of 961.69 W at a maximum temperature of 543.3K with a maximum electric power of 3.395W from our thermoelectric modules.

Abstract: When designing energy-efficient homes and buildings especially in the passive standard is needed to efficiently utilize solar heat gain in the winter and orientation of glazed surfaces on the sunlit side. But it is also necessary to prevent overheating of rooms in the summer. This can be achieved by choosing the correct shielding of windows or whole building. In evaluating of energy intensity, however , the methods of shading adversely affect the final annual heat demand for heating the building. This is fundamentally influenced by the correction factor Fsh. This can be determined simply or by calculation in accordance with ČSN EN ISO 13790. The aim of this article is to determine what effect has the calculation of the correction factor to calculate the specific heat for heating for an example of 2 houses in passive standard in comparison with its simplified purpose.

Abstract: Recently, biomass fuel gas from the gasification furnace is widely used for power generation. However, there are many kindes of impurities in the biomass fuel gas. If they aren’t removed, they will have great disadvantages on the safe operation of gas turbine. So it must be purified before combustion in order to protect the gas turbine. Wet electrostatic precipitator can be used for purifying the biomass fuel gas for its high collection efficiency. The characteristics of biomass dust and collection efficiency of wet electrostatic precipitator are presented in the paper. A compared study on collection efficiency between dry electrostatic precipitator and wet one are carried out at the same condition. The results show that the dust in biomass fuel gas contains many elements, such as Si, O, Mg, Al, K, Ca and Fe. Its median diameter d₅₀ is 26.05 μm. Collection efficiency gradually increases with the water pressure at beginning of test. It doesn’t increase until the water pressure is 0.4 MPa. The higher the wind speed in electric field, the lower the collection efficiency is. Collection efficiency can be improved by adding alkali to the spraying water. When the polar matching is RS tubular barbed wire with 480C plate, water pressure is 0.4 MPa and gas velocity is 1.0 m/s, collection efficiency of the wet electrostatic precipitator is 5% more than the dry one.

Abstract: Wind energy is an important alternative energy resource because of it clean, does not cause pollution and it can be used as replacement of a fossil fuel energy. Utilization of the wind energy, the wind speed data has to be analyzed to make sure before use it. In this article is to present the wind speed data analysis by using Weibull distribution method. Wind speed data from the meteorological station at Pakchong district, Nakhonratchasima province, Thailand was used as the case study. The results show that this area has wind speed about 2.5 to 3.5 m/s. The average wind power density was 17.513 W/m² and the total wind energy was 153.9819 kW·hr/m² per year. This wind potential of this area can be used for water pumping and electricity generating for use in a household.

Abstract: In this paper, fuzzy financial evaluation models are derived to analysis investment financial profitability and possibility for wind power generation project in Penghu, Taiwan. The financial subsidy and feed-in tariff (FIT) are two effective market mechanisms to promote wind power development in Taiwan. The performances of the proposed fuzzy profit models are verified by considering their application to a simulation case. The study shows the fuzzy financial indexes of the simulated 2,400 kW wind power project may little uneconomic possibility, with negative net present value, with benefit cost ratio smaller than 1, and with payback years longer than its life span, in both two scenarios. The FIT rates should be revised to match wind power current market to give more attractiveness for potential investors. The studied results are also consistent with those provided by the conventional crisp models, and provide readily implemented possibility analysis tools for use in the arena of uncertain finance.

Abstract: Along with our country, a steady and rapid development of economy, politics and culture, the traffic also got rapid development with the trend. The improvement of people's living standard in our country, more and more frequent transportation also emerged, the requirement for the quality of travel people also put forward higher requirements; Therefore, as a responsible for the daily commuter traffic tools, urban rail transit train delay problem should give our attention. The types of urban rail traffic delay is described in this paper, including the initial delay and joint and several delays, and expounds the time characteristics and spatial characteristics of delays, and the urban rail transit delays was studied, on the single line shows the single delays the transmission of the recursive formula, for the delay of the urban rail transit emergency disposal provides theory basis.

Abstract: Most of the new stations have chosen to install Platform Screen Door (PSD) for safety and energy-saving. But this will lead to the distribution of passengers are not evenly distributed but gathered in front of the PSD. Traditional idea will not reflect the true state of waiting passengers. Design a new method of passenger state classification evaluation in urban rail transit station platform is essential. In this paper, we proposed a new approach to evaluate the level of service (LOS) of platform. The results suggest that the new approach provides a better performance than its alternatives.

Abstract: This article describes the service facilities in urban rail station, introduces the concept of passenger safety, and elaborates the few research on the safety level of the passenger. Using systematic dynamics method, the passenger behavior processes at the station can be analyzed and the passenger flow could be calculated. Silimar with service level evaluation factors, the paper proposes a method to assess the security both at escalator and platform in station for practical applications.

Abstract: The highway guardrail is the last secure defense which can protect the driver and passenger safety and make the vehicles along the original correct direction when out of control. Collision simulation between vehicle and semi-rigid waveform beam guardrail was achieved. Collision model was given and dimension optimization of the semi-rigid waveform beam guardrail was completed. Dynamic explicit finite element method was applied to simulate and analyze collision process. Optimized height of the lower beam and thickness of the upper and lower beams were obtained, which helped save material, solve the tripping phenomenon and increase safety property of the highway guardrail.

Abstract: Private and public transportations are use as common mobility of people, making it important to know where traffic congestions, car accidents and other related vehicular activities that may ruin your way to office works or to your destinations be avoided. Philippines is known to be one of the most traffic congested in the world due to uncontrollable volumes of cars running in major streets every day. In this paper, a proposed wireless device that can be attached to a vehicle was developed to track the route using global positioning system, perform geo fencing and perform controlling mechanism to help the driver locates a shortest path, avoid traffic jams, and do messaging and traffic advisories based on contacts and information stored in the software utilities. Based on initial testing, the software is capable of recording and reading vehicle logs, activating GPS route, reading accelerometer log, and reading compass log as bases of controlling mechanism while the device is activated, WiDrive. Result shows that WiDrive is reliable as it successfully mapped to the GPS, and passed the crash accelerometer test at different distance. If given a chance to improve and implement in a wide scale testing, an exponential benefits can be achieved.