Applied Mechanics and Materials Vols. 316-317

Abstract: Since the establishment of peak-valley electricity price system, many enterprises in China have devoted to research on peak load shifting strategies. This paper firstly analyzes the feasibility of applying peak load shifting for mixing procedure in two aspects: rubber compound standard and electric power consumption, then establishes the shifting model, makes depth description to the planning and scheduling algorithm that implements the model, then verify the model with real data and finally reach the expected goal. At last, the paper introduces MESNAC planning and scheduling solutions which have integrated the shifting model.

Abstract: The thermal performance Rov of Flat-Plate Closed-Loop Pulsating Heat Pipe(FCLPHP) are effected by several elements such as the heat load Q, the tilt angle θ and the filling ratio F, they are interacted each other. In order to predict the effect of Q and θ on the thermal performance at locations Q and θ other than the experimental data conditions, and to study the relationship among the Rov, Q and θ in the range of the experimental data, we need a fitted regression model to estimate the function relationship that describes the data. The postulated depends on the range of the regression variables encountered in the data. In this paper, a simple model was developed. Since the coefficients in the model have been estimated from the experimental data, studies were carried out on an experimental set-up. FC72 was employed as working fluid. Method of least squares was used for building the model. By using the model, effects of the heat load and the tilt angle on the thermal performance of FCLPHP were discussed. It was found that the tilt angle had minimum value in a certain heat load in the experimental range (θ=30° -70°), and it increases with the increase of heat load. A sensitivity analysis was done with the model.

Abstract: An experimental SGSP was constructed in Tibet and its thermal performance in winter was investigated in this paper. The LCZ temperature observed was no less than 20 oC in winter subfreezing time. The impact of ice layer upon SGSP was analysed briefly as well, it was found that the ice layer showed different impacts on the performance of SGSP depended on its thickness and transparency condition. Several promising measures for the improvement of SGSP operating in winter were also proposed.

Abstract: A model gas turbine burner was employed to investigate spray flames established under globally lean, continuous, swirling conditions. Two types of fuel were used to generate liquid spray flames: palm biodiesel and Jet-A1. The main swirling air flow was preheated to 350 °C prior to mixing with airblast-atomized fuel droplets at atmospheric pressure. The global flame structure of flame and flow field were investigated at the fixed power output of 6 kW. Flame chemiluminescence imaging technique was employed to investigate the flame reaction zones, while particle imaging velocimetry (PIV) was utilized to measure the flow field within the combustor. The flow fields of both flames are almost identical despite some differences in the flame reaction zones.

Abstract: The characteristics of ignition and combustion and activation energy of YiMin coal and organic waste liquid and their blends in different blending ratio are studied by thermogravimetric analysis. The experimental results show that ignition and burning characteristics of coal are better than organic waste liquid. The ignition temperature of organic waste liquid will decrease, while the maximum weight loss rate will increase and the time corresponded to maximum weight loss rate will get earlier with the increase amount of the coal added. Activation energy of samples is calculated. Compared with the coal, the activation energy of the low temperature zone of organic waste liquid is lower and its ignition characteristic is better. The activation energy of the high temperature zone is bigger and its combustion characteristic is worse. The coal added will reduce the ignition characteristic but promote the combustion characteristic of organic waste liquid. The analysis of the combustion index S indicates that the comprehensive combustion characteristic of the organic waste improves significantly when coal is blended, and the best blending ratio is 2:3.

Abstract: A new kind of hybrid wind and solar energy power system was proposed in this paper. In the hybrid system, the technologies of compressed air energy storage (CAES), solar heat storage and gas-steam combined cycle power generation were combined together. At same oil consumption of 19.48 t/h, the output power of the hybrid system in the paper was 194.69 MW, while that of the conventional gas-steam combined cycle was 103.15 MW. The difference between the two cycles was 91.54 MW, which was equivalent to the amount of wind and solar energy power generation. When annual effective operating time of the hybrid system was 2600 h, the power output of wind and solar energy power generation reached 238 million kW•h. If coal-fired power plants were taken as the reference standard, about 113,050 tons of coal was saved per year. An overall benefit of Ұ604.28~626.01 million was obtained per year. As a result, a good economic, environmental and social benefit was achieved.

Abstract: This paper aims to investigate the rapid pyrolysis characteristics of Huainan coal using a tube furnace. Influence of temperature on yields and compounds of tar and char are tested. The result shows that aliphatic chains break gradually with increasing pyrolysis temperature. This leads an increase in aromaticity. Maximum tar yields were obtained at about 550°C, the char yields decreased and the gas yields increased with the pyrolysis temperature. The tar was isolated to aliphatic hydrocarbon aromatic hydrocarbon, non hydrocarbon and asphaltene, and characterized by chromatography-mass spectrometry (GC/MS). The main content of tar include normal alkanes from C16-C30, two-,three- and four-ring aromatic hydrocarbons and alkyl-substituted hydroaromatic derivatives of polycyclic, phenols, indoles, quinines esters and others compounds.

Abstract: Exergy analysis has been widely applied in parallel with energy analysis in order to find the most rational use of energy. Low exergy systems are defined as heating or cooling systems that allow the use of low valued energy, which is mostly delivered by solar energy (i.e., solar collectors, hybrid PV/T panel) as the energy source. Low exergy building systems create more flexibility and generate new possibilities for the design of sustainable buildings. Usage of solar energy in different kinds of systems provides scope for several studies on exergy analysis. The present study comprehensively reviews the studies conducted on the exergy analysis of various solar energy systems for establishing the sustainable buildings. Conclusions regarding the usability of the exergy method as a tool to promote a more efficient use of solar energy sources are derived, with the aim to highlight future research issues and promote further developments of this method.

Abstract: This paper gives a brief introduction to the spectrum of the solar light radiation characteristic. According to the aberration characteristics of the wide spectrum and large aperture optical system, two aberrations which are spherical aberration and chromatic aberration are corrected, transmission and reflection type solar light collection optical system are designed respectively. The optical system’s work waveband is 0.4~0.82μm, aperture is 600mm, focal length is 1320mm. The figures of optical system, spot diagram are given and the advantages and disadvantages of two systems which are transmission type and reflection type are compared.