Applied Mechanics and Materials Vol. 492

Abstract: In article the technique of construction of the automated system for data processing is considered at the electromagnetic control of geodynamic objects. The structure of interrelations for the object-oriented and serving subsystems realizing methodical, technical and a supply with information of processes of registration and data processing of the geodynamic control is determined.

Abstract: This paper presents an essential oil extraction process in accordance with sustainable development and environmental protection. The idea is to use vegetal plant after extraction as a source of energy for steam production and the condensation of steam containing essential oil is ensured by an air-cooled condenser. In this prospect, a biomass burner was designed and its efficiency was evaluated and compared to an electrical heating system. From the experiments it was found that biomass could supply the energy needed to produce steam for essential oil extraction process. The essential oil yield and composition are comparable to those obtained by a classical method using an electrical heating system and a water-cooled condenser. The industrial projection and innovation lays in the integration of renewable energy in existing mobile extraction units by using solid waste as a source of energy for steam production. The condensation of steam containing essential oil can be ensured by an air-cooled condenser with fans powered by photovoltaic solar energy. Possibilities of clean energy integration and water economy in such process unit are the major technological advance in this alternative approach for energy and water savings especially in agro-based industries.

Abstract: Saudi Arabia is blessed with abundant solar energywhichcan be use to meet its ever increasing power requirement. In this regard, the energy analysis and plant performance of integrated solar combined cycle (ISCC) plant with direct steam generation (DSG) was carried out for Dhahran, Saudi Arabia using four representative months of March, June, September and December. The plant consists of 180MW conventional gas turbine plant and two steam turbines of 80MW and 60MW powered by the solar field and gas turbine exhaust. With high insolation during the summer month of June the plant can achieve up to 25% of solar fraction with ISCC plant efficiency of 45% as compared to gas turbine base of 38%.This can however be improved by increasing the number of collectors or/and the use of auxiliary heater .

Abstract: Three kinds of methods commonly used for estimating Weibull parameters were fitted to a collection of wind speed data at 10 m above ground level for the year of 2009 to determine the best distribution function which describes the wind speed variation at Msila, Algeria site for wind energy. Three methods used the coefficient of determination R2, root mean square error RMSE and Chi-Square χ2 were compared with failure analysis. According to the results of failure analysis the moment method has better results than graphic method and power density method. The wind power density calculated from moment method shows a good approximation to estimate the power density. So the Weibull distribution using the moment method adequately fit the data and it is suitable for modeling the wind speed distribution in Msila province of Algeria.

Abstract: The wind speed is varying with fluctuations and random feature, as for conventional HCS algorithm, the oscillation around maximum power point (MPP) was serious, which can cause vibrations of crankshaft and mechanical parts wear, also the misleading decision of conventional HCS method causes the failure in keeping maximum power. A new HCS method for MPPT control was proposed, the principle of MPPT was analyzed and new algorithm was programmed, the new method inherits the advantages of variable step HCS, so that the MPP reached rapidly. Also the detection and halt mechanism was introduced, which can reduce searching direction misleading and rotor speed oscillations at MPP, the feasibility and effectiveness of the proposed MPPT strategy have been verified through simulations and experimental results.

Abstract: In the past decades, the study on Hot Dry Rock (HDR) geothermal resource has been a hot topic. A large number of investigations confirm that electricity power generated from HDR is feasible and suggest that HDR geothermal source is a kind of local and renewable energy. Up no now, many countries have carried out HDR experiments. As a large energy consumption country, China will also develop HDR geothermal energy in the near future. In the present study, our preliminary data potentially suggest that Guangdong province have great potential to develop HDR geothermal applications.

Abstract: This paper analyzes the optimizing distribution problems between the by-product gas in gas tank and self-contained boiler in electric power plant in the iron and steel plant. We discuss factors which have effect on operating costs, such as the control of gas tank position, the change of fuel load of self-contained boiler in electric power plant, price change of outsourcing fuels and so on. We set corresponding penalty function in iron and steel company as well as establish the optimizing mathematical model in gas supply system according to these questions. It can be known through solving the model that the gap of gas supply and consumption can be solved by optimizing distribution between gas tank and self-contained boiler in electric power plant. After that, reducing the consumption of purchased fuels amount and the frequent changes of fuels load in boiler, improving the efficiency of power generation, achieving zero-emission, making the gas supply system operates securely, economically and stably can realize.