2011 National Postgraduate Conference最新文献_第3页

Development of TiO2 nanotubes for hydrogen sensing application 氢传感用TiO2纳米管的研究进展

2011 National Postgraduate Conference Pub Date : 2011-09-01 DOI: 10.1109/NATPC.2011.6136456

Nurhidaya Soriadi, N. M. Mohamed, F. Hussin

引用次数: 0

Numerical evaluation of radiowave propagation in evaporation ducts using FEM 无线电波在蒸发管道中传播的有限元数值计算

2011 National Postgraduate Conference Pub Date : 2011-09-01 DOI: 10.1109/NATPC.2011.6136389

A. Iqbal, V. Jeoti

引用次数: 1

Targeting for process HENs design in the context of total sites 目标是在整个站点的背景下进行过程母鸡设计

2011 National Postgraduate Conference Pub Date : 2011-09-01 DOI: 10.1109/NATPC.2011.6136280

Abdel Samed M. Adam, M. I. Abdul Mutalib, S. Mahadzir

{"title":"Targeting for process HENs design in the context of total sites","authors":"Abdel Samed M. Adam, M. I. Abdul Mutalib, S. Mahadzir","doi":"10.1109/NATPC.2011.6136280","DOIUrl":"https://doi.org/10.1109/NATPC.2011.6136280","url":null,"abstract":"The paper presents a targeting method for process heat exchanger networks (HENs) design in the context of total sites. The method is based on a simultaneous optimization framework for the HENs utility cost and utility systems operating cost. Instead of the standalone HEN capital-energy costs trade-off, the method utilizes the trade-off between the HEN capital cost and the total utility systems operating cost. The total utility systems include steam and non-steam utility systems within the site. The energy cost of the HEN is replaced by the total utility systems operating cost to avoid explicit calculations of steam costs when targeting for HENs design. This enables handling the variability of steam costs with the steam utility loads and the minimum approach temperature, ΔTmin, of the HEN without assuming fixed steam costs as in the existing methods. The optimum ΔTmin is that corresponds to the minimum total cost which involves the HEN capital cost and total utility systems operating cost. The simultaneous optimization framework combines the optimization of utility systems using Mixed-Integer Linear Programming (MILP) with targeting for the HENs design using Pinch Analysis. The method was demonstrated using an example total site.","PeriodicalId":6411,"journal":{"name":"2011 National Postgraduate Conference","volume":"222 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75172362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study of two-phase flow friction factor in EOR injection wellbores 提高采收率注水井两相流摩擦系数研究

2011 National Postgraduate Conference Pub Date : 2011-09-01 DOI: 10.1109/NATPC.2011.6136463

Kanagaswarran Citalingam Mudliar, M. A. Shoushtari, Abdelrahman S. Bishari

{"title":"Study of two-phase flow friction factor in EOR injection wellbores","authors":"Kanagaswarran Citalingam Mudliar, M. A. Shoushtari, Abdelrahman S. Bishari","doi":"10.1109/NATPC.2011.6136463","DOIUrl":"https://doi.org/10.1109/NATPC.2011.6136463","url":null,"abstract":"Two-phase flow is said as the flow of two phases simultaneously in a pipe. Two-phase flow occurs in both production and injection wellbores. In injection wellbores, the two-phase moves downward and so it is known as downward flow. The complexity of two-phase flow starts due to the present of flow patterns in the pipe. The flow patterns vary due to the density and viscosity differences between the phases which contribute to the difference in velocity of both phases. The geometry of the well is another factor which donates to the difference in flow pattern. The simultaneous flow of these two-phases creates a pressure drop which is caused by the loss due to friction, acceleration and elevation. The friction lose is due to the friction between both the phases besides the friction between the phase and the pipe wall. This study is aimed at calculating the friction factor of two-phase flow in injection wellbores based on different flow patterns. The calculation of two-phase flow has been developed by various scholars and a few mechanistic models been published. Based on the available mechanistic models, Hasan and Kabir model has been chosen with the reason of accuracy and continuity.","PeriodicalId":6411,"journal":{"name":"2011 National Postgraduate Conference","volume":"269 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77903777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design, analysis and fabrication of Electret-based micro-electromechanical systems energy harvester 驻极体微机电系统能量采集器的设计、分析与制造

2011 National Postgraduate Conference Pub Date : 2011-09-01 DOI: 10.1109/NATPC.2011.6136424

M. R. Ahmad, M. Khir

引用次数: 4

Depth estimation using monocular cues from single image 基于单眼图像的深度估计

2011 National Postgraduate Conference Pub Date : 2011-09-01 DOI: 10.1109/NATPC.2011.6136388

Yasir Salih, A. Malik, Zazilah May

引用次数: 12

Information technology in SMEs private healthcare 信息技术在中小企业民营医疗中的应用

2011 National Postgraduate Conference Pub Date : 2011-09-01 DOI: 10.1109/NATPC.2011.6136292

Aliza bt Sarlan, Rohiza bt Ahmad, Wan Fatimah bt. Wan Ahmad, P. Dominic

引用次数: 3

A ZCMT precoding based STBC MIMO-OFDM system with reduced PAPR 基于ZCMT预编码的降低PAPR的STBC MIMO-OFDM系统

2011 National Postgraduate Conference Pub Date : 2011-09-01 DOI: 10.1109/NATPC.2011.6136332

I. Baig, V. Jeoti, M. Drieberg

引用次数: 4

Development of alkaline — Surfactant flooding for oil recovery 碱性表面活性剂驱油技术的研究进展

2011 National Postgraduate Conference Pub Date : 2011-09-01 DOI: 10.1109/NATPC.2011.6136461

S. M. Aslam, I. Saaid, I. Tan

{"title":"Development of alkaline — Surfactant flooding for oil recovery","authors":"S. M. Aslam, I. Saaid, I. Tan","doi":"10.1109/NATPC.2011.6136461","DOIUrl":"https://doi.org/10.1109/NATPC.2011.6136461","url":null,"abstract":"Jatropha curcas contains extractable renewable non-edible oil which can be converted into surfactant suitable for oil recovery due to its hydrophilic property. Chemically, it contains high fatty acid components comprised primarily of oleic acid (44.7%) and linoleic acid (32.8%). In this study, a surfactant based on Jatropha oil was developed and tested against the interface tension reduction in the presence of alkaline, co-solvent and brine. Jatropha fatty acid was extracted via saponification process and neutralized with sodium hydroxide yielding sodium fatty acid. The performance of the synthesized surfactant was studied by measuring the interfacial tension (IFT) between the surfactant solution and crude oil, and its phase behaviour at reservoir temperature. Phase behavior is dependent upon the surfactant, alkaline and brine concentration, which are expressed as viscosity of the microemulsion. In order to mobilize residual oil trapped by capillary forces in oil reservoirs, many enhanced oil recovery (EOR) methods rely on reducing the oil-water IFT to extremely low values by using lowest surfactant concentration. Dulang crude oil used have high contain of wax and low acid value react with surfactant which contains fatty acid and reacts with the alkaline solution to produce in situ surfactant (ionized acid) which be able to lowers the oil-water IFT. The ionized acid is surface active and has a tendency to partition into the aqueous phase where it may form soap with sodium ions present in the surfactant and aqueous phase at a high ionic strength. The soap has a trend to partition into the oil phase. The removal of the ionic acids from the interface can cause low dynamic IFT. The result of this work indicates that the lowest IFT of surfactant concentration are distinctive for the different alkaline concentration. Significantly, the increase of surfactant concentration amplified the microemulsions. This enhanced the viscosity of the aggregated phase. Furthermore, makes the process economical for the best oil recovery.","PeriodicalId":6411,"journal":{"name":"2011 National Postgraduate Conference","volume":"8 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81934295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

3D human face reconstruction from single image using interactive shape from shading 使用交互式阴影形状从单幅图像重建三维人脸

2011 National Postgraduate Conference Pub Date : 2011-09-01 DOI: 10.1109/NATPC.2011.6136297

M. B. Adm, A. Said

引用次数: 2