Advanced Materials Research Vols. 347-353

Abstract: Abstract. As a high efficiency, low consumption and clean energy, ground source heat pump technology has been pay more and more attention, the number of installation of system is growing rapidly. However, the use of geothermal resources is still extensive at this stage. Effective methods are pure in obtaining thermal physical parameters of geothermal wells around. In-situ thermal response testing is close to the real use of heat pumps, when injecting in or extracting heat from geothermal wells, the testing equipment will collect data, and then thermal physical parameters will be accurately calculate. This paper introduce a thermal response testing equipment, the equipment will add a constant cold or heat to geothermal well, circulating heat flow and pressure data is collected as well as temperature. And then thermal physical parameters of formation and heat exchanging performance are calculated.

Abstract: In this paper, a year filed survey has been conducted in eighty households which are located in six different climatic districts in Japan from December 2002 to November 2003. The investigated contents included energy consumptions for different end users, indoor climate conditions, thermal performance of the buildings, lifestyles of residents, etc.. In addition, statistical analyses were carried out using the quantification method I, so as to find out the influential factors that determine residential energy consumptions.

Abstract: This paper studies the effects of Chinese relative domestic oil prices on net processing exports. Using a set of monthly data ranging from 2002 to 2008, we identify a long-run equilibrium cointegrating relationship between the two inflationary series. The unidirectional short-run Granger causality is running from relative oil prices to net processing exports, while in the long-run, the Granger causality is bidirectional. What is noteworthy is that relative oil price shocks have long-run positive effects on Chinese net processing exports, indicating the existence of an energy cost-driven mechanism of endogenous technological change.

Abstract: In this paper through the use of literature, survey visit and other methods, the author studies the development status of national fitness campaign in China. Some main problems are found as follows ：national fitness concept which still needs to be enhanced, imbalances of the fitness development in different regions, irrational age structure participating in fitness, uneven groups participating in fitness activities, and lack of social sports instructors and so on.

Abstract: With the development of the smart grid, residential electricity services have a higher bandwidth and frequency requirement to the power system communication , the existing power 230MHz narrow-band data transmission communication has been unable to meet the needs of the two-way interaction between the users and the smart grid. In terms of current communication technology in the power system, this paper introduces a wireless broadband radio frequency chip ,which supports 100MHz to 1.2GHz frequency range, and 5KHz to 2MHz tunable bandwidth.With the chip embedded in intelligent electricity interactive terminals, distribution monitoring terminals and other devices, it can achieve flexible and intelligent electricity services. This paper describes the architecture of the RF chip,and gives key technology solutions such as broadband matching, adjustable IF bandwidth of the channel, sums up the advantages of the chip,presents the application in the smart grid. The analysis finds that the chip has a variety of charateristics such as high integration, good redundancy, versatility, flexibility and so on, and can satisfy the growing application needs of power speacial network,and has an extremely promising market .

Abstract: Vacuum is an important economic indicator of influencing turbine load and thermal efficiency. And heat transfer efficiency affects the level of vacuum directly. From the point of heat transfer analysis, combining with the production practice in a power plant, this paper proposes a method of improving heat transfer effectiveness and the condenser exchanging condition. Through the method of reducing the heat load of condenser, improving the tightness of the vacuum system, cleaning the heat surface and reducing the cooling water temperature, we improve the vacuum and reach the aim of energy saving.

Abstract: Industrial development has lead to higher energy consumption, and emission of greenhouse gases. Cement industry plays an important role in energy consumption and overall greenhouse gases emissions. This paper reviews the preceding studies concentration on the provision of energy saving, carbon dioxide emission reductions correlated with implementation of a number of technologies applicable to improve the energy efficiency in the cement industry. Energy efficiency measures for clinker production. It is found the largest amounts of thermal energy saving, electrical energy saving, emission reductions are 4.1 Giga Joule per ton, 35 kilo Watt hour per ton, 112,61 kilogram CO2 per ton respectively.

Abstract: In this paper, micro-grid operation modes exist in different supply reliability, stability and new energy efficiency and other issues, on the micro-grid system in different operation modes were analyzed, proposed control strategy, the establishment of different operation modes of the micro-grid control model, using MATLAB software simulation experiment to verify its feasibility.

Abstract: In continuous production industry, to develop energy-saving technology, an essential modeling method should be selected to reflect both production process and the energy consumption simultaneously. In this work, we propose a novel coupling model for production and energy consumption. In this production-energy-coupled model (PECM), four flows are included, the material flow, the energy flow, the information flow and the emission flow. The material flow is abstracted from traditional technological documents about process description; the energy flow represents the any kind of energy transformation and consumption of all possible energy sources used in current factories, the electrical power, coal, diesel, steam, water etc.; the information flow is the running status, pre-alarm, alarm information from the production devices, and the control information from the controller in a distributed computer system(DCS) in the production field or a remote control signal from a central dispatch & control center in a big enterprise; and the emission flow is defined as any kind of emission coming out from the production at both middle production units or the final units of a whole continuous production line. Finally some specific conclusions of the production-energy-coupling model (PECM) are drawn respectively.

Abstract: Abstract: The effect of electromagnetic treatment on corrosion behavior of carbon steel and stainless steel in simulated cooling water was investigated by electrochemical impedance spectroscopy, potentiodynamic polarization techniques and water analysis. It was found that the charge transfer resistance decreased and the corrosion current density increased after electromagnetic treatment for carbon steel electrode, which shows that such treatment promotes corrosion of carbon steel in simulated cooling water. In contrast, the pitting potential of 316L stainless steel electrode rose which revealed that electromagnetic treatment of the experimental water exhibited corrosion inhibition to 316L stainless steel. Reasons for different corrosion behavior of the two metals were discussed.