Advanced Materials Research Vols. 512-515

Abstract: In the system, a 51 microcontroller (functions as CPU) collects digital signals transferred by LM358 (functions as voltage comparator) from voltage signals of throttle position sensor; a photoelectric sensor detects vehicle speed while the microcontroller calculates vehicle speed. CPU analyzes and compares these two types of signals and judges whether the optimal fuel consumption for gear shift is reached. If so, CPU will output a playing instruction to a voice chip and remind driver of shifting gears.

Abstract: A general air-source heat pump water heater originally designed to work with R134a was reconstructed as experimental rig for performance studies on systems using different refrigerants including R32, R134a and the mixture of R32/R134a which mass ratio is 1:5. Experimental results showed that the power consumption of the heat pump water heater charged individually with R32 would greatly exceed the system’s original pre-set maximum input power. When the leaving water temperature was increased from 18°C to 58°C, the average discharge temperature of the heat pump charged with R32/R134a mixture was 13.6% higher than that with R134a. The average power consumption of the heat pump with R134a was 253.5W less than that with R32/R134a mixture. However, the average COP (Coefficient of Performance) obtained by that with R32/R134a mixture was 0.83 higher than that with R134a.

Abstract: Instead of changeable chromosome length genetic algorithm, a new method based on particle swarm optimization algorithm is proposed to search a train’s energy efficient operation strategy under running disturbance condition in railway network. The algorithm is designed and validated using a referenced simulation case. Compared with other methods, it demonstrates this new PSO-based algorithm has a better result in efficiency and may be considered to use in practice.

Abstract: The character of billet heating is studied, in order to improve the billet heating quality and save energy, the prediction model within a billet temperature field is established. The billet heating process is carried on the modeling successful used finite element analysis. Based on analysis of billet heating model and ANSYS software, the temperature field in billet and the temperature setting of reheating furnace are combined, two methods are put forward of temperature optimal setting, the heat transfer situation and temperature field distribution within billet has been reappeared in the billet heating process, the optimal energy saving strategy of billet heating has got.

Abstract: During lignite pyrolysis process, there will produce large amounts of gas which is low calorific value, combustion difficult. This paper creatively put forward a program: high temperature and oxygen-containing flue gas of coal-fired mix combustion with low calorific value gas. Compared to mixing high calorific value fuel, the distinguishing feature of this program is ultra-low cost, and technically feasible. In this scheme, the stability of high-temperature and oxygen-containing flue gas is key technology. Through coal-fired experiments, we obtained generation rule of high-temperature and oxygen-containing flue gas, and summed up a diminishing marginal effect.

Abstract: Based on the existing problem of thermal insulation structure of thermal recovery boiler , a novel thermal insulation structure of thermal recovery boiler is designed. The novel thermal insulation structure was used on a boiler in field test, and its thermal insulation characteristics were tested. According to the test data, thermal conductivities of the novel and the conventional thermal insulation structure were calculated. Contrast analyses indicated that thermal insulation characteristic of the novel thermal insulation structure for thermal recovery boiler was better than that of the conventional thermal insulation structure.

Abstract: In this paper, the energy balance of black liquor gasification (BLG) and coal-water slurry (CWS) gasification was analyzed. The results showed that the conversion efficiency of BLG (43.71%) process was slightly lower than that of CWS gasification (44.71%). Meanwhile, the material cost of BLG to synthesis gas was 0.36 Yuan/ m3 while CWS gasification was 0.69 Yuan/ m3. On account of above analysis, BLG was expected to have similar industrial applied prospect like CWS gasification

Abstract: In this paper, circular water pump of a thermal station in Shijiazhuang is taken as the research object of the heating system, whose energy consumption is analyzed. The circular water pump adopts variable frequency speed regulation control, which changes the waste of energy from the previous control system with flow control valve. Along with outdoor temperature change, this paper sets up the mathematical model of the operation adjustment. It is calculated by the analysis: the system can save electricity about 77500 degrees in a heating period. At the same time frequency conversion efficiency can reach 30.88 ﹪, and electricity consumption is only 0.69 of the original heating system. It changes the heating system shortcomings which are low efficiency and big energy consumption before, and improves energy efficiency.

Abstract: Railways are an energy-efficient mode of transportation. Even so, efforts are being made to attain even further energy savings. The latest train-car model of the Shinkansen bullet train, while achieving enriched functionality and improved performance, has attained a 49% energy reduction compared with the 0-series Shinkansen train-cars that debuted at the start of Shinkansen's operation. Also, in the underlying train control system, technologies that will lead to energy reduction have been developed. In order to achieve further energy savings and higher-performance train control, we are developing a new train control system known as Automatic Train Protection and Block System (sometimes referred to ATP-Block system here). This new control system produces a high energy-saving effect compared with conventional signal systems based on ground equipment. We believe that realization of low-cost, highly functional energy-saving Railways will bring back users of automobiles and airlines to Railways, contributing to global energy saving and helping to prevent environmental destruction.

Abstract: The down draft kiln which uses producer gas as fuel generates high-temperature waste gas, wasting a lot of energy and making it difficult to get high firing temperature. Based on the theory and experiences from practice, herein we propose a set of methods aiming at improving the energy efficiency of the kiln. The methods include: directly heating raw materials using the high-temperature waste gas from the kiln; changing the location of combustion chamber from the bottom to the top of the kiln; modifying other aspects (such as the numbers of kiln, the location of kiln and flue). The validity of these modifications was verified by an industrial experiment. It was demonstrated that with same size of kiln, the productivity of a kiln used for firing bauxite increased by more than 30% and the fuel consumption was reduced by more than 16%.