Advanced Materials Research Vols. 512-515

Abstract: In order to effectively reduce the comprehensive energy consumption of the refrigeration system so as to achieve the purpose of energy saving and emission reduction, from a practical point of view, this design studied cold storage refrigeration system’s exhaust heat recovery device and its applications, which fully recovered the exhaust sensible heat of refrigeration system and combined with solar collector’s work to provide energy for materials drying. Through the design and matching of the solar collectors, exhaust heat recovery unit, dehumidification evaporator, drying chamber assembly structure and controlled atmosphere organization to achieve the device’s technical synthesis of freezing and drying, so as to realize a comprehensive energy consuming system of one input and two outputs, which provides a new direction for the energy-saving development of similar devices.

Abstract: To study practical methods about energy-saving and noise reduction of fan,by analysising energy consumption and noise formation mechanism of fan in evaporative condenser. on the basis of the fan structure optimization (large diameter fan equiped width blade, anteversion structure),adopting multi-blowers starting and stopping control independently and Variable frequency fan, Optimum solution of energy-saving and noise reduction of fan was obtained.

Abstract: The Genetic Algorithm is proposed to be used in the flow path optimization so as to simplify the path and rationalize the allocation of resources in the article. Thus, the optimized flow path can help to improve the efficiency and ultimately make the layout more practical to meet the requirements of the distribution center layout design. One limitation has been concluded that only one optimization scheme can be obtained in this method.

Abstract: a new method of locating the pinch is presented for the design of heat exchanger networks. The method is based on the pinch design method for heat exchanger networks which was first introduced by Linnhoff. The method first consider both the heat loss of a hot stream and the heat capacity flowrate of a stream with variation in temperature in the design of heat exchanger networks. Which affect not only minimum utility requirement for heat exchanger network but also the pinch location, choice ofΔTmin

Abstract: In present research ionic liquid, 1,3-dimethylimidazolium dimethylphosphate ([MMIM][DMP]) and water were taken as the new working pair for absorption heat transformer (AHT). The thermodynamic cycle performance for this working pair was simulated based on its thermodynamic data, mass and energy balance for each component in a AHT. The effects of absorption and condensing temperature on the coefficient of performance (COP), exergy efficiency (ECOP), concentration deference between dense and dilution solutions and flow rate ratio were analyzed. The cycle performance comparison for AHT using two working pairs, H₂O + [MMIM][DMP] and H₂O + LiBr was carried out. The results indicate that the COP and ECOP of AHT for H₂O+ [MMIM][DMP] are all lower than those for H₂O + LiBr, but they can still reach 0.4 and 0.5 respectively when condensing and generation temperatures are 35 and 90 °C respectively. The excellent physical and chemical properties of ionic liquid mentioned above together with suitable cycle performance make this new working pair to have the potential application in absorption heat pump or absorption heat transformer.

Abstract: It has resulted in a lot of electic energy waste that the constant flow of circulating water system operating on power frequency oversupplies heat in the heating period.We investigate algorithm modelling of energy-saving adjustment, adjusting methods and development of embedded controller. Furthermore,we sum up the intelligent regulation method integrated multiple parameters.By this method,heating circulating water system would be varies with change of atmosphere temperature and hot load . Thus the purpose of lower electricity consumption is achieved that based on guarantee of heating effect.

Abstract: Fuel oil-mixture gas converter is used for heavy oil exploitation is a new equipment of thermal recovery. Strength calculations and enthalpy values are related in the design. For selection and design to each part-structure of the fuel-mixture converter. Applied the analysis software of ANSYS FLUENT, fuel-gas combustion simulation is to combustion chamber of Fuel oil-mixture gas converter. The results show that the design is feasibility.

Abstract: Management efficiency and intelligence of lighting system is enhanced by designing the reasonable lighting control network. Lighting energy-saving is also achieved. The energy shortage is relieved. Lighting control network is designed based on LonWorks. The whole design proposal of control network is provided. Control function is achieved by developing hardware and software of intelligent node. Connection problem of scatter intelligent nodes is solved by network installation. System running coordinately is ensured. There are problems about openness and expansibility of lighting system and equipment compatibility during the establishing process of lighting control network. The problems are effectively solved through the lighting control network. Management efficiency is enhanced. Lighting energy-saving is achieved LED combining with energy-saved lamp.

Abstract: A wireless sensor node can only be equipped with a limited power source due to the several hardware constraints. Moreover, for most applications, replenishment of power resources is impossible. WSN lifetime, therefore, shows a strong dependence on battery lifetime. Thus the sources that consume energy during the operation of each node should be analyzed and maintained efficiently. In this paper, we propose a energy efficient clustering routing algorithm based on LEACH (EE_LEACH), which aims to balance energy consumption in WSN through modification of the threshold and multi-hop data transmission. Simulation results show that the algorithm can save node energy consumption effectively and prolong the network lifetime.

Abstract: Based on the data of 30000t/a CO₂ capture & purification pilot scale test in Shengli power plant, the principle and method of CO₂ compression and liquefaction were introduced, the calculation model of energy consumption for CO₂ liquefaction process was built, the effection factors of CO₂ purification power were analyzed, the ways to optimize energy saving were discussed. The results show that: (1) improving liquefaction pressure can effectively reduce the total power of CO2 compression and liquefaction, as the compression pressure increases, the compression power increases while the liquefaction power and total power reduce; (2) While the liquefaction pressure is less than 3.3MPa, compression power is less than liquefaction power, While the liquefaction pressure is greater than 3.3MPa, compression power is greater than liquefaction power; (3) While the liquefaction pressure of CO₂ at the critical pressure 7.4 MPa, the theoretical total power is minimum.