Advanced Materials Research Vols. 347-353

Abstract: This paper is based on the BIN metrological data and calculates the cold and heat load of the building.According to the performance parameters of the WSHP, the energy consumption and cost of two typical schemes is calculated.Contrast the investment and cost of the SWHP and air conditioning system and discuss the applicability of commercial buildings. Result shows that WSHP costs less than traditional air conditioning in the present operation conditions. Energy-saving effect is remarkable.

Abstract: In order to research effects of storage conditions on physical properties of cut tobacco, storage temperature, storage humidity and storage time were studied by uniform design method in this paper. Intuitive analysis results showed that the best store process parameters such as storage temperature, humidity and time were 26°C, 61% and 32h respectively. Stepwise regression analysis results indicated storage process parameters affected physical properties of cut tobacco such as moisture content, filling power, proportion of long strands and its conversion extremely. And the regression equations were significant effective. But there was no efficacious regression equation between proportion of small strands of cut tobacco and storage process parameters.

Abstract: According to the characteristics and difficulties of the soft-base coat drying, the approach of solving the temperature sensitivity through the furnace type structure design as well as the mechanical and electrical chain design is put forward. The form of the infrared radiation field used for soft-base coat drying is determined. By analyzing the characteristics of the infrared heating element and its reflection equipment, a mathematical model of radiation is proposed, and by using of the results and programs obtained from the model, the scientific design method of infrared radiation field is presented. The problem of requirements for uniform temperature of the soft-base coat is solved by infrared radiation field design and movement of belt. By taking the energy saving reconstruction of an infrared blast furnace as an instance, the effectiveness of the proposed method is verified. The design method not only has guiding significance to the design of soft-base coat infrared drying, but also has reference value to other types of infrared heating design for energy saving .

Abstract: A novel solid base catalyst, structured MgO/Al₂O₃-Al catalyst packing, was prepared by supporting MgO onto a thin film of alumina that was formed by anodic oxidation of high purity aluminium foils. Some preparation parameters including the molar ratio of Mg(NO₃)₂•6H₂O to CH₃(CH₂)₁₆COOH, the aging time, the calcination temperature and time were investigated by using the catalyst for the condensation of acetone to diacetone alcohol. Each of those factors had some influence on the catalyst activity and an optimum value was obtained. The conversion of acetone was 20.2%, and the selectivity to diacetone alcohol was 100% under the optimized preparation conditions.

Abstract: Cho Dongsung’s “nine factors model” highlighted and enlarged the importance of “manpower” factor in the forming of competitive power. Based on elaborating “nine factors model”, this paper demonstrates the importance of human capital in energy chemical industrial clusters competitiveness forming, and analyses the present situation of Yulin’ energy chemical industry cluster, points out the question which existing in the development of human capital in it, then proposes some policy suggestions to enhance the human capital integration ability of government, and promotes Yulin’s energy chemical industrial clusters competitiveness.

Abstract: This paper presents a theoretical analysis on parallel feed LT-MED desalination system with thermal vapor compressor which is helpful to the design and operation of such kind of seawater desalination plant. The mathematical model of a parallel feed LT-MED desalination system with thermal vapor compressor (TVC) is developed on the basis of the mass and energy conservation equations. In the model, the temperature loss is considered caused by the boiling point elevation (BPE) of seawater and the steam flow resistance is also included caused by flowing through tube bundle demisters and pipelines between adjacent evaporators. The property parameters of seawater are taken as the functions of temperature and concentration. A computer program is drawn up to solve the mathematical model. The calculation is based on the system with rated water production 3000 t/d. Taking actual operation into account, the influence of heating steam temperature of the first effect and entrained steam position of TVC on system performance are analyzed. The results show that when other relative parameters are fixed, the gained output ratio (GOR) and the total area of evaporators change slightly with the increasing of the heating steam temperature of first effect under the calculation condition of this paper. The results also demonstrate that there exist suitable entrained steam positions of TVC for the cost of water.

Abstract: The large multi-chiller system is commonly used in the semiconductor factories and electronics factories, it is one of the department consumed a great deal of energy in factory. Therefore, it is worthwhile to design the chilled water system operation. In this paper, a design methodology is developed for multi-chiller system in which chiller units consist of different cooling capacities chiller that run in parallel. The optimal integrity scheme can be obtained using the MINLP method which minimizes the system energy consumption within a future time period. Instead of a lag scheme used in the general method, this forecasting scheme provide a integral optimal schemes within a future time period and offers the operating reference for operators.

Abstract: Enabling technologies for wireless sensor networks have gained considerable attention in research communities over the past few years. With the advantage of high power density, piezoelectric vibration energy harvester is promising in self-powered wireless sensor networks. In this work, modeling of piezoelectric generator based on a bimorph cantilever is discussed and functional characteristics of the bimorph piezoelectric cantilever are given. Corresponding step-up energy harvesting circuit according to the practical application requirements is developed. Then an integrated environmental vibration energy harvester with a size of approximately 83mm × 55mm × 12mm was fabricated. The results shows that the energy harvester is able to provide a stable 3.3V supply voltage under 37Hz working frequency.

Abstract: This paper applies super-heated steam drying technology to improve the quality of lignite. A unique experimental system was built up. In order to obtain the optimum operation conditions, the drying kinetics was measured. The temperature range of super-heated steam was from 120 to 200°C. The results showed that the drying process of super-heated steam drying of lignite can be well depicted by two stages, as a constant drying rate stage followed by a falling drying rate stage. The comparison of drying process to the hot air drying showed the superior advantages of super-heated steam drying on safety, drying capacity and energy conservation. Analysis shows the huge application potential of lignite in power plants by means of the super-heated steam drying.

Abstract: In order to attain the higher efficiency, SOFC(solid oxide fuel cell) is used in a cogeneration system. This paper first introduces the cogeneration system for buildings which makes good use of power and heat energy. Power energy used for domestic loads and the surplus can be provided for utility grid. Exhaust heat from the reactor can be used for water and space heating, and also can be used for absorption heat pump to supply cooling. Then the demonstration projects are given. Through the analysis of the cases, discusses the exiting challenges in the SOFC for building applications.