检索结果-南通市图书馆

Development of thermophysical calculator for stainless steel casting alloys by using CALPHAD approach

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China Foundry 2017年第5期14卷 353-358页

作者： In-Sung Cho K.D.Savelyev V.M.Golod Korea Institute of lndustrial Technology Korea Peter the Great St.Petersburg Polytechnic University Russia

The calculation of thermophysical properties of stainless steel castings and its application to casting simulation is discussed. It is considered that accurate thermophysical properties of the casting alloys are necessary for the valid simulation of the casting processes. Although previous thermophysical calculation software requires a specific knowledge of thermodynamics, the calculation method proposed in the present study does not require any special knowledge of thermodynamics, but only the information of compositions of the alloy. The proposed calculator is based on the CALPHAD approach for modeling of multi-component alloys, especially in stainless steels. The calculator proposed in the present study can calculate thermophysical properties of eight-component systems on an iron base alloy(Fe-C-Si-Cr-Mn-Ni-Cu-Mo), and several Korean standard stainless steel alloys were calculated and discussed. The calculator can evaluate the thermophysical properties of the alloys such as density, heat capacity, enthalpy, latent heat, etc, based on full Gibbs energy for each phase. It is expected the proposed method can help casting experts to devise the casting design and its process easily in the field of not only stainless steels but also other alloy systems such as aluminum, copper, zinc, etc.

关键词： stainless steels casting simulation thermophysical properties CALPHAD

Advanced Industrial Engineering in Next Generation of Manufacturing systems

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Mechanics Engineering and Automation 2014年第4期4卷 311-317页

作者： Branislav Micieta Vladimira Bifiasovit Michal Haluska Department of lndustrial Engineering Faculty of Mechanical Engineering University of Zilina Zilina 010 26 Slovak Republic

The article deals with possible approaches to the development trends in the industrial engineering in manufacturing organizations. The authors emphasize the need for integration of advanced industrial engineering in the next generation of manufacturing systems, which responds to new trends of production, innovation and advanced technology. This integration represents a sustainable development, so that humanization of work are increased, more effective use of natural and energy resources are achieved and production costs are reduced. Trends in the products manufacturing must meet both industrial engineering as well as production management. The development trends in the industrial engineering in manufacturing organizations must use methods and tools of advanced industrial engineering to achieve competitiveness. The second part of this article deals with specification of these approaches in next generation of production systems.

关键词： Advanced industrial engineering development trends manufacturing enterprise intelligent agent autonomous control.

Conceptual Framework for an Integrated Method to Optimize Sustainability of Engineering systems

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of energy and Power Engineering 2015年第7期9卷 608-615页

作者： Alfredo del Cano Maria Pilar de la Cruz Juan Jose Cartelle Manuel Lara Department of lndustrial Engineering II Higher Polytechnic University College University of Coruha Campus of Esteiro Ferrol 15403 Spain

It is necessary to change the current dynamic of growth, to assure that future generations can satisfy their needs. Sustainable development and global sustainability are two concepts that have achieved great importance in almost every sector of activity. There is a wide range of methods and models for sustainability assessment. Nevertheless, it is necessary to go beyond evaluation, looking for sustainability optimization. In spite of this, little work has been done on the latter field. The authors present here a conceptual proposal for an integrated method to optimize sustainability of engineering systems, based on the MIVES （integrated value method for evaluating sustainability） method. For a better understanding of the method, its essential steps for optimizing an energy sub-system are summarized （shell-and-tube heat exchanger）.

关键词： Sustainability MIVES simulation optimization metaheuristics

Wireless Sensor Networks for Optimisation of District Heating

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of energy and Power Engineering 2013年第7期7卷 1362-1369页

作者： Anatolijs Zabasta Viesturs Selmanovs-Pless Nadezda Kunicina Leonids Ribickis Faculty of Power and Electrical Engineering Institute of lndustrial Electronics and Electrical Engineering Riga TechnicalUniversity Riga 1045 Latvia Micro Dators Ltd. Riga 1045 Latvia

The upgrading of the DH （district heating） system through installing WSN （wireless sensor networks）--a technology by which to monitor and control quality operation of the DH system will lead to more effective use of thermal energy, enabling also the provision of quality customer services, as the data concerning the status of the existing networks is available in a timely manner, and in the stated amounts. Over the last decades, the use of WSN systems in enabling quality monitoring of heat production and supply process has been widely discussed among various researchers and industry experts, but has been little deployed in practice. These researchers and industry experts have analysed the advantages and constraints related to the use of the WSN in district heating. A pilot project conducted by Riga Heat （the main heating supplier in Riga, Latvia） has allowed to gain a real life experience as to the use of the WSN system in district in-house heating substations, and is deemed to be a major step towards future development of WSN technologies.

关键词： District heating GPRS heating substation wireless sensor networks XML.

Multi-variable Optimization of HVAC System Using a Genetic Algorithm

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of energy and Power Engineering 2014年第2期8卷 306-312页

作者： Rongling Li Ryozo Ooka Graduate School of Engineering The University of Tokyo Tokyo 153-8505 Japan Institute of lndustrial Science The University of Tokyo Tokyo 153-8505 Japan

Geothermal is a fast-growing alternative heat source for HVAC systems, however, the initial cost of using a ground source HVAC system is higher compared to an air source system. Studies about system design and operation are necessary to reduce the initial cost and ensure that the ground source heat pump system has high efficiency, resulting in a lower total life-time cost. In this study, a multi-variable evolutionary computation algorithm is proposed for generating optimal parameters for a geothermal source HVAC system. The system was modeled and simulated using MATLAB. The design parameters were calculated by minimizing the energy consumption, Based on an experimental building, a case study was presented. Using this model, the optimal set points were calculated and used as a designed system. energy consumption of this system was reduced by about 10% compared to the system operated with a fixed supply cold water temperature （7 ℃）.

关键词： Ground source air-conditioning system genetic algorithm optimization MATLAB.

A Review of energy Efficiency in Data Processing Centers

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of energy and Power Engineering 2011年第4期5卷 361-372页

作者： C. Redondo A. Fern/mdez Castile and Leon Technological Center for Supercomputing （FCSC） Edificio CRAI- TIC Campus de Vegazana s/n University of Le6n E-24071-Lean Spain Electrical Engineering and systems Engineering and Automatic Control Department Faculty of lndustrial and Computer Engineering University of Leon E-24071-Leon Spain

This article explores, through a case study, measures of energy efficiency in data processing centers. An analysis of this case demonstrates how the design criteria could improve the rate of consumption in IT centers, which is currently the second most contaminating industry on the planet, and is the responsible for 2% of CO2 emissions, surpassed only by the aeronautical industry. The present and future situation of IT center energy consumption and associated environmental effects is analyzed, and also looks at how state-of-the-art technology, correctly implemented, could ensure significant rationalization of data processing center energy consumption. The article will examine optimization techniques, specific problems and case studies.

关键词： energy management data processing centers energy efficiency.

Data Center as a Key Player of a District Electric Power and Heat Network System： A Comparison in Urban and Suburb Regions

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computer Technology and Application 2013年第10期4卷 548-555页

作者： Shunsuke Mori Yuuki Hori Masashi Ohkura Kazuhisa Kamegai Department of lndustrial Administration Faculty of Science and Technology Tokyo University of Science Noda-shi Chiba2 78-851 O Japan TOKYO Gas Co. Division of Energy Solution Tokyo 105-8527 Japan Graduate School of Machinery Engineering Osaka Prefecture University Sakai-shi Osaka 599-8531 Japan

A DC （data center） demands air-conditioning power as large as the 1/3-1/2 of total electricity consumption. Thus, energy saving of cooling power of DC yields considerable effect on both economic and environmental views. PV （Photovoltaic） and absorption refrigerator with CGS （cogeneration systems） or gas boiler are possible power saving options. The waste warm air from DC would be utilized for greenhouse heating when DC and greenhouse locate near in the suburbs. In this study, the authors develop an energy network model to assess the potential contribution of DC as a major electric power and chilled air consumer as well as the warm air supplier in a district to the energy efficiency improvement. The evaporation heat of LNG （liquefied natural gas） utilization is also considered as well as PV, CGS. This model is applied to the cases of the urban area in Tokyo which involves athletic center, shops and hospital and the suburbs including greenhouse and then compared.

关键词： Data center distributed energy systems urban and suburbs.

CSO to Solve Optimal Demand for TOU Customers in Power systems

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of energy and Power Engineering 2015年第7期9卷 660-667页

作者： Wei-Nong Chen Zheng-Yi Chen Jung-Chin Chen Department of lndustrial Engineering and Management Cheng Shiu University Kaohsiung 833 Taiwan Department of Computer Science and Information Engineering Li-Chih Valuable School Kaohsiung 807 Taiwan Department of Electronic Engineering National Kaohsiung University of Applied Sciences Kaohsiung 807 Taiwan

The aim of this research is to study the optimal demand decision for the Taiwan Residents industries through CSO （cat swarm optimization） algorithm. The five formulations of optimal demand are developed to solve optimal contract capacity for TOU （time of use） customer. Results indicated that, the CSO algorithm is highly helpful to Taiwan Residents industries on the optimal demand decision. Also the CSO is superior to PSO （particle swarm optimization） in the fast convergence and better performance to find the global best solution in the same iterations.

关键词： CSO peak loading optimal demand TOU load management

Diffusion of Solar energy Use in the Built Environment Supported by New Design

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Civil Engineering and Architecture 2014年第2期8卷 253-260页

作者： Marina van Geenhuizen Joop Schoonman Angèle Reinders Faculty of Technology Policy and Management Delft University of Technology Delft 2628 CE The Netherlands Faculty of Applied Sciences Delft University of Technology Delft 2628 CE The Netherlands Faculty of Engineering Technology Univiversity of Twente Enschede 7500 AR The Netherlands Faculty of lndustrial Design Engineering Delft University of Technology Delft 2628 CE The Netherlands

Places of large potentials of sustainable energy production and places of large energy consumption are often very different and separated by large distances across the globe. This paper first discusses potentials of solar technology in terms of global availability using PV （photovoltaic） technology and actual energy production. Solar energy is widely under-used and one way to reduce this is to improve production in low-energy places with high demand： large cities. According to this option, about 40% of the electricity consumption in the built environment could be produced by solar PV systems and energy storage systems. This paper discusses conditions in the built environment and functional and design qualities enabling an increased diffusion of the technologies In a comparative analysis of PV technologies, the criteria taken into account encompass efficiency of the type of solar cell and commercial availability. Special attention is paid to the design features of different PV systems, like flexibility, colour and transparency that might help in their utilization as integrated in building material and ornaments in modem architecture. The same procedure is followed for electricity storage devices. The preliminary conclusion is that at present the freedom of design is largest for a combination of crystalline silicon PV cells and Li-ion batteries.

关键词： Solar PV energy systems battery storage systems design qualities built environment.