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Thermal Effect Analysis of Hot flow Manifold Made for Industrial Automated Washing Machine 工业自动化洗衣机热流歧管的热效应分析
Pub Date : 2017-06-01 DOI: 10.9790/1684-140306106115
P. G. Ekade
Automated Manifold acting in component processing machine is developed with thermal effect assessment. Manifold to perform transfer of fluid and air through optimized inlet piping with pneumatically sliding whole assembly. Vertical and horizontal mounting feasibility for this assembly gives perfect solution to make transfer of fluid in any position. Non reachable geometrical surfaces and complex shapes are to be covered for washing and drying which are already with bur, oil and dirt. This manifold is to be installed in SPM washing machine. Heated air and heated fluid intake gives perfect required supply through output temperature in medium to perform cycle operations in SPM. Considered output temp of medium is at least 45°C. Manifold sliding design parameters are developed with considering all engineering terms. Manifold with optimized thermal effective solution to achieve minimum 45 ° C. Flow Analysis is performed with Rate of heat transfer through this dedicated manifold and heat fluxes on manifold body is validated in this work.
研制了具有热效应评价功能的零件加工自动化集成管。歧管执行流体和空气的传递,通过优化的进口管道与气动滑动整体组件。垂直和水平安装的可行性,该组件提供了完美的解决方案,使流体在任何位置的转移。不可触及的几何表面和复杂的形状是覆盖清洗和干燥,已经有烧伤,油和污垢。该歧管安装在SPM洗衣机上。加热的空气和加热的流体入口通过介质的输出温度提供完美的所需供应,以在SPM中执行循环操作。介质考虑输出温度至少45℃。在考虑所有工程条件的情况下,制定了多种滑动设计参数。流形与优化的热效率解决方案,以达到最低45°c。流动分析进行了热传导率通过该专用流形和流形体上的热流在本工作中得到验证。
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引用次数: 0
The Relationship of Accident Risk Factors with Traffic Road Safety: A Study on Commercial Mini-Bus Accident in Nigeria. 事故危险因素与交通道路安全的关系——以尼日利亚商务车事故为例。
Pub Date : 2017-06-01 DOI: 10.9790/1684-1403063438
Engr. Dr. A.O Oke, Engr. Dr. Arowolo M.O, Engr. Oyebamiji B.A, A. Oloyede
The main purpose of this study is to identify the relationship between Human Factors, Mechanical/Vehicle Factors, Environmental/Road Factors and Road Safety. Ten traffic agent officers (Comprising Road Safety Corps, Road Safety Marshal, State Security Service Officers, Police Traffic officers and National Union of Road Transport Workers (NURTW) officers) were selected as a sample, survey questionnaire was used for data collection for a period of two months, majority of the officers (52.7%) were in the age category of 36 to 44 years old, with (96.7%) having driving education with training. There were significant relationship between Human Factors, Mechanical/Vehicle Factors (r=0.619, p<0.01) and Environmental/Road Factors (r=0.579, p<0.01). Result from multiple regression analysis shows that 62.7% can be explaining by Human Factors, Environmental Factors and Mechanical/vehicle Factors contribution to mini bus traffic accident with significant relationship between Human Factors, Environmental Factors (r=0.619, p<0.01) and Mechanical Factors (r=0.579, p<0.01) with accident occurrence. It is therefore recommended that commercial transport company needs to do a lot of human factors preventive measure among bus drivers by conducting training and risk perception seminar from time to time.
本研究的主要目的是确定人为因素、机械/车辆因素、环境/道路因素与道路安全之间的关系。选取10名交通代理人员(包括道路安全总队、道路安全总指挥、国家保安局官员、警察交通官员和全国道路运输工人工会(NURTW)官员)作为样本,采用调查问卷收集数据,为期两个月,大多数(52.7%)的人员年龄在36至44岁之间,(96.7%)的人员接受过驾驶教育和培训。人为因素、机械/车辆因素(r=0.619, p<0.01)和环境/道路因素(r=0.579, p<0.01)之间存在显著相关。多元回归分析结果表明,62.7%的小巴交通事故可由人为因素、环境因素和机械/车辆因素解释,其中人为因素、环境因素(r=0.619, p<0.01)和机械因素(r=0.579, p<0.01)与事故发生呈显著相关。因此,建议商业运输公司需要通过不定期的培训和风险认知研讨会,对公交车司机进行大量的人为因素预防措施。
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引用次数: 1
Wear behavior and Microstructural Characterization of AA7075/MWCNT Surface Composites fabricated through Friction Stir Processing 搅拌摩擦法制备AA7075/MWCNT表面复合材料的磨损性能及显微组织表征
Pub Date : 2017-06-01 DOI: 10.9790/1684-140305140146
Syed Azeem Pasha, Ravinder Reddy P, Laxmi Narayana P
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引用次数: 4
The Effect of Coarse Aggregates Types on Properties of Self Compacting Concrete 粗集料类型对自密实混凝土性能的影响
Pub Date : 2017-06-01 DOI: 10.9790/1684-1403065357
Manar A. Abdul Hady, A. AhmedAbdEl-azim, H. El-Ghazaly
The main purpose of this study is to investigate the effect of using three types of coarse aggregates (gravel, basalt and dolomite) and three different percentages of water and cement on the properties of selfcompacting concrete. To this end, nine mixes containing different percentages of water and cement were designed. Three types of aggregates were used namely; gravel, basalt, and dolomite. The all fresh concrete mixes were prepared to achieve standard workability (slump flow). The compression, splitting tensile, and flexural strength tests were carried out on hardened self-compacting concretes after 28 days. In the nine mixes, three types of aggregates (gravel, basalt and dolomite), three cement content (350, 400, and 450 kg/m3), and three water cement ratio (0.46, 0.42, and 0.38) were used. Results showed that. Slump flow of dolomite selfcompacting concrete is greater than all concrete mixes with gravel and basalt. The density of self-compacting concrete basalt mix is greater than other concrete mixes with gravel and dolomite. The compressive, split tensile, and flexural strengths of self-compacting concrete dolomite mix is higher than all concrete mixes with gravel and basalt.
本研究的主要目的是探讨使用三种粗集料(砾石、玄武岩和白云石)和三种不同比例的水和水泥对自密实混凝土性能的影响。为此,设计了9种不同比例的水和水泥混合料。采用了三种骨料:砾石、玄武岩和白云岩。所有新拌混凝土的配制均达到标准和易性(坍落度流动)。对自密实混凝土进行28d后的压缩、劈裂拉伸和抗弯强度试验。在9种混合料中,使用了3种集料(砾石、玄武岩和白云岩)、3种水泥含量(350、400和450 kg/m3)和3种水灰比(0.46、0.42和0.38)。结果表明。白云岩自密实混凝土的坍落度大于砾石和玄武岩混合混凝土。玄武岩自密实混凝土配合比其他含砾、白云石的混凝土密度大。白云岩自密实混凝土的抗压强度、劈裂抗拉强度和抗弯强度均高于所有含砾和玄武岩的混凝土。
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引用次数: 2
Improvement in Grs Compressor System to Increase Reliability of Combined Cycle Power Plant PT. PJB UP Muara Tawar 提高联合循环电厂可靠性的Grs压缩机系统改进
Pub Date : 2017-06-01 DOI: 10.9790/1684-1403072529
W. P. Adi, Jhon Arcidma, Muhammad Roshie Friansyah, K. Gunawan, T. R. Biyanto
Fuel gas is the main fuel used in PT PJB UP Muara Tawar combined cycle power plant. Reliability of combinend cycle power plant can be affected with fluctuative supply of fuel gas. Fuel gas supplied by PGN with pressure range 24-26 barG. Because of fluctuative pressure from supplier, pressure of gas must be adjusted by using Gas Receiving Station (GRS) system. There are HMI local panel in GRS as interface. HMI local panel consist of bypass system and fuel gas compressor system. Bypass system used to decrease gas pressure when gas pressure above the upper limit while compressor used to increase gas pressure when gas pressure under lower limit. GRS have an important role in operational Block 5 PT PJB UP Muara Tawar. In 9 December 2011-26 Januari 2015 period, Block 5 can not be operated because of mechanical seal failure in fuel gas compressor in GRS. Ordering new seal has take a long time. GRS can not be operated when compressor gas fail due to fluctuatif pressure of supplied gas. Moreover, GRS has far distance from main control room (MCR). It will be difficult to monitor GRS parameter from control room. By this problem, research and improvement in GRS should be done so that performance of GRS can be improved. Improvement in low limit fuel gas pressure was performed. By this changing, inlet pressure GT operation has wider range. In addition, making 1K changeover can increase GRS performance. The addition of overview, parameters, alarm indicators on Alspa HMI can improve the reliability of the operation of Gas Turbine because the operator can respond faster when there is a change of parameters in GRS.
燃气是PT PJB UP Muara Tawar联合循环电厂使用的主要燃料。燃气供应的波动会影响联合循环电厂的可靠性。燃气由PGN供应,压力范围24- 26barg。由于供气压力波动较大,必须通过燃气接收站系统对供气压力进行调节。GRS中有HMI本地面板作为接口。HMI局部控制板由旁通系统和燃气压缩机系统组成。旁路系统用于在气体压力超过上限时降低气体压力,压缩机用于在气体压力低于下限时增加气体压力。GRS在Muara Tawar Block 5 PT PJB UP运营中发挥了重要作用。2011年12月9日至2015年1月26日期间,由于GRS燃气压缩机机械密封失效,Block 5无法运行。订购新的封条花了很长时间。当供气压力波动导致压缩机气体失效时,GRS不能运行。此外,GRS与主控制室(MCR)的距离较远。从控制室对GRS参数进行监控是很困难的。针对这一问题,需要对GRS进行研究和改进,以提高GRS的性能。对低极限燃气压力进行了改进。通过这种改变,进气压力GT运行范围更广。此外,进行1K转换可以提高GRS性能。在Alspa HMI上增加概述、参数、报警指标,可以提高燃气轮机运行的可靠性,因为当GRS中参数发生变化时,操作员可以更快地响应。
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引用次数: 0
Contribution of components of Green Supply Chain Continuous Improvement in Green Supply Chain Performance measurementA Pilot Empirical Study of the Indian Automobile Manufacturing Sector 绿色供应链要素持续改进对绿色供应链绩效衡量的贡献——以印度汽车制造业为例的试点实证研究
Pub Date : 2017-06-01 DOI: 10.9790/1684-140305110114
M. A. Gandhi
This paper is one of the several extensions of the research works done by [5]. Green Supply Chain Practices have been known to have an impact on Green Supply Chain Performance [6].This paper tests empirically through a pilot study of the Indian Automobile Manufacturing Sector, the contribution of the eleven variables constituting the construct Green Supply Chain Continuous Improvement in Green Supply Chain Performance measurement. Also the paper establishes the reliability of the questionnaire instrument developed previously for measuring the construct Green Supply Chain Continuous Improvement and also for measuring the eleven variables that constitute the construct Green Supply Chain Continuous Improvement. Further the paper establishes the correlation among these eleven variables. Finally this paper conducts Confirmatory Factor Analysis (CFA) to arrive at a single factor (linear combination of eleven variables constituting the construct Green Supply Chain Continuous Improvement) to aid in measuring the construct Green Supply Chain Continuous Improvement. Finally the paper establishes the order of contribution of the eleven variables constituting the construct Green Supply Chain Continuous Improvement.
本文是[5]研究工作的几项延伸之一。绿色供应链实践已经被认为对绿色供应链绩效有影响[6]。本文通过对印度汽车制造业的试点研究,实证检验了构成绿色供应链持续改进的11个变量在绿色供应链绩效度量中的贡献。本文还建立了先前开发的用于测量构建绿色供应链持续改进的问卷调查工具的可靠性,以及用于测量构成构建绿色供应链持续改进的11个变量的可靠性。进一步建立了这11个变量之间的相关性。最后,本文通过验证性因子分析(CFA)得出单个因子(构成绿色供应链持续改进的11个变量的线性组合),以帮助衡量绿色供应链持续改进的构建。最后,本文建立了构成绿色供应链持续改进的11个变量的贡献顺序。
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引用次数: 1
Comparison of Thermal Energy Lost through Exhaust Gases at Various Engine Speeds and Torque Loads for Diesel and Biodiesel Fuels 柴油和生物柴油燃料在不同发动机转速和扭矩负荷下通过废气损失的热能的比较
Pub Date : 2017-06-01 DOI: 10.9790/1684-1403070812
George Onyango Orido, G. Ngunjiri, M. Njue
This paper compares amount of thermal energy lost through exhaust gases when an engine was operated on diesel and biodiesel. The study used a 4.7 hp (3.5 kW) single cylinder, four-stroke, multi-fuel engine which was operated on diesel and biodiesel fuels. Experiments were conducted for the two fuels at engine speeds of 1000, 1250 and 1500 rpm in accordance with the manufacturer’s recommendations. The engine was tested for torque loads of 6 to 22 Nm at intervals of 4 Nm for speeds and fuels studied. The instrumentation of the engine was mainly equipped with data acquisition system and software for analysis. Exhaust gas mass flow rate and temperature measurements were used to determine lost thermal energy. Lost heat energy depended on the temperature of the waste heat gases and mass flow rate of exhaust gas. The energy lost in exhaust gases increased substantially with increased exhaust gas temperature. The results showed that more energy was lost through exhaust when the engine used biodiesel as compared to when it was fueled on diesel. Maximum heat loss through exhaust was 18.7% of fuel energy when the engine used biodiesel at a speed of 1500 rpm and a torque load of 14 Nm.
本文比较了以柴油和生物柴油为燃料的发动机通过废气损失的热能。这项研究使用了一台4.7马力(3.5千瓦)的单缸、四冲程、多燃料发动机,使用柴油和生物柴油燃料。根据制造商的建议,在1000、1250和1500 rpm的发动机转速下对这两种燃料进行了实验。发动机在6至22牛米的扭矩负荷下,以4牛米的间隔测试速度和燃料。发动机的仪表主要配备了数据采集系统和分析软件。废气质量流量和温度测量用于确定损失的热能。损失的热能取决于废热气体的温度和废气的质量流量。随着废气温度的升高,废气中损失的能量显著增加。结果表明,与使用柴油相比,使用生物柴油的发动机通过废气损失的能量更多。当发动机使用生物柴油,转速为1500转/分,扭矩负载为14牛米时,排气的最大热损失为燃料能量的18.7%。
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引用次数: 1
Effects of Machining Parameters on Tool Steel D2 in Wire cut EDM 线切割电火花加工中加工参数对工具钢D2的影响
Pub Date : 2017-06-01 DOI: 10.9790/1684-1403061219
P. R. Patil, P. Solanki, Dr.S.P. Shekhawat
Non-conventional machining process like electro discharge machining (EDM) and wire electrical discharge machining (WEDM) plays important role in precision manufacturing process. This micro-machining process may help overcome the limitations and restriction faced during conventional mechanical machining process.The selection of machining parameters in any machining process significantly affects production rate, product quality and production cost of a finished one component. Wire EDM process involves a large number of variables that affect its performance. In this paper, an attempt is made to study the effect of various process parameters such as pulse on time, pulse off time and current for high carbon high chromium cold work tool steel (D2). The experiment has been completed with the help of Design of experiment by Taguchi method is applied to create an orthogonal array of input variables using the ANOVA. The regression analysis is used to optimize the process parameter of Surface roughness. The experimental analysis showed that the combination of pulse on time, pulse off time and current is optimum to achieve minimization of surface roughness (Ra).
电火花加工(EDM)和线切割加工(WEDM)等非常规加工工艺在精密制造过程中发挥着重要作用。这种微加工工艺有助于克服传统机械加工工艺所面临的局限和制约。在任何加工过程中,加工参数的选择都对成品零件的生产率、产品质量和生产成本产生重大影响。线材电火花加工过程涉及大量影响其性能的变量。本文对高碳高铬冷作工具钢(D2)进行了脉冲开启时间、脉冲关闭时间和电流等工艺参数的影响研究。本实验在实验设计的帮助下完成,采用田口法利用方差分析建立了输入变量的正交数组。采用回归分析方法对表面粗糙度工艺参数进行优化。实验分析表明,脉冲开启时间、脉冲关闭时间和电流的组合是实现表面粗糙度(Ra)最小化的最佳选择。
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引用次数: 1
Analysis For Determining Factors That Make Good Design Process In Automotive Manufacturing Organization. 汽车制造组织设计过程的决定因素分析。
Pub Date : 2017-06-01 DOI: 10.9790/1684-14030597104
A. Mohammed, Iqbal Hussain, Zuraidah Bin Zain
This study involved a literature review as well as information, data collected and analysis in two automotive industries. The paper investigated factors that make good design process in automotive manufacturing organization in order to improve the design process at each stage of manufacturing. The methodology adopted in this work is to evaluate the said factors by qualitative technique in sending structured questionnaires to three automotive companies in Malaysia and Nigeria to fifty five product design engineers in those companies in order to get their input on a specific phenomenon. Reliability, descriptive and correlation analysis were carried out using SPSS software to analyze and justified the consistency, reliability and significant of each factor in order to increase the decision makers confidence. The factors are categorized as independent variables in the analysis namely; Customer requirement, Product life cycle, Process planning. Technology and Information gathering. While products design process was set to be the dependent variable. The study results analysis indicate that all the selected factors are within the acceptable range.
本研究涉及文献综述以及信息,数据收集和分析在两个汽车行业。本文研究了汽车制造组织中形成良好设计过程的因素,以期对汽车制造各阶段的设计过程进行改进。在这项工作中采用的方法是通过定性技术评估上述因素,将结构化问卷发送到马来西亚和尼日利亚的三家汽车公司,到这些公司的55名产品设计工程师,以获得他们对特定现象的投入。采用SPSS软件进行信度、描述性和相关性分析,对各因素的一致性、信度和显著性进行分析和论证,以增加决策者的信心。在分析中将这些因素分类为自变量,即;客户需求,产品生命周期,工艺规划。技术和信息收集。而将产品设计过程设为因变量。研究结果分析表明,所选因子均在可接受范围内。
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引用次数: 1
Effectiveness of Curing Compound on Concrete 混凝土养护复合材料的有效性
Pub Date : 2017-06-01 DOI: 10.9790/1684-1403057376
Dinesh W. Gawatre, Komal Sawant, Rupali Mule, Neha Waydande, Dhanashri Randeve, T. Shirsath
In construction industries concerte are basic requirement to built any construction. Concrete is manmade material which is used all over the world. Curing is the most important factor of the concrete to perform planned functions throughout designed life of structure while immoderate curing time may intensify the construction cost of project and irrelevant delay of project, where there is deficiency of water and on downhill surfaces where curing with water is problematic and in cases where large areas like pavement have to be cured. As stated earlier about the conventional curing methods the use of membrane curing compounds is very important from the frame of reference that water resources are getting precious every day. The upgrading in the construction and chemical industries have lead the way for development of new curing techniques and construction chemicals such as Membrane curing compounds, Self curing agents, Water proofing compounds. In this paper we will compare results of different grade of concrete and curing compounds with various climatic changes.
在建筑行业,混凝土是建造任何建筑的基本要求。混凝土是一种人造材料,世界各地都在使用。养护是混凝土在整个结构设计寿命期内执行规划功能的最重要因素,养护时间过长可能会增加工程的施工成本和工程的不相关延迟,特别是在缺水和用水养护存在问题的下坡表面,以及需要大面积养护的路面等情况下。正如前面提到的常规固化方法,从水资源日益宝贵的参考框架来看,膜固化化合物的使用是非常重要的。随着建筑工业和化工工业的升级换代,新型养护技术和建筑化学品如膜固化化合物、自固化剂、防水化合物等得到了发展。在本文中,我们将比较不同等级的混凝土和养护化合物在不同气候变化下的结果。
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引用次数: 5
期刊
IOSR Journal of Mechanical and Civil Engineering
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