International journal of energy engineering最新文献_第4页

Modelling the Economic Impact of Electricity Tariff Increases on Eskom’s Top Customer Segment 电费上涨对Eskom顶级客户群体的经济影响建模

International journal of energy engineering Pub Date : 2012-12-01 DOI: 10.5923/J.IJEE.20120206.06

M. J. Cameron, R. Rossouw

{"title":"Modelling the Economic Impact of Electricity Tariff Increases on Eskom’s Top Customer Segment","authors":"M. J. Cameron, R. Rossouw","doi":"10.5923/J.IJEE.20120206.06","DOIUrl":"https://doi.org/10.5923/J.IJEE.20120206.06","url":null,"abstract":"With the rapid and sharp rise in energy prices in South Africa, the cost of energy is becoming a factor that cannot be ignored in either energy-intensive or -dependent industries. In the energy-intensive industries, for examp le, this immed iate and direct perspective can result in the incurring of costs that are greatly magnified by the large amount of power consumed. Few would therefore deny the importance of electricity as an essential input to production and to economic activity in general. Based on the fact that changes in electricity prices impact on basically each and every individual in South Africa, and mo re specifically on an energy utility provider's core business, it is important to determine its effect on each of these entities. The develop ment of an analytical Cost of Production Tipping Po int (CoPTP) model, combined with the economy-wide modelling capabilit ies of an Applied General Equilib riu m (A GE) model for South Africa, will help to determine what the potential impact would be, given the market forces at play at any particular instance. The aim of this paper is therefore to help develop an understanding of the impact of increasing electricity prices on an energy utility provider's main assets - its customers, by determining the broader potential economic impact on the South African economy. The value of this framewo rk is therefore that it will provide strategic context, will allow for a better understanding of the influence of electricity price increases on both energy-intensive and -dependent industries, while also informing key stakeholders regard ing imp lications of potential changes in customer operational environ ments to an energy utility provider in terms of potential revenue risk implications, as well as to the rest of industry and the broader market in South Africa due to potential second round feedback effects.","PeriodicalId":14041,"journal":{"name":"International journal of energy engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81541092","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: 3

Natural Resources Ecological Monitoring in Pirgulu State Nature Preserve 皮古鲁国家级自然保护区自然资源生态监测

International journal of energy engineering Pub Date : 2012-12-01 DOI: 10.5923/J.IJEE.20120205.05

U. Mammadova

引用次数: 0

Analytical Study of an Innovated Solar Power Tower (PS10) in Aswan 阿斯旺创新太阳能发电塔(PS10)的分析研究

International journal of energy engineering Pub Date : 2012-12-01 DOI: 10.5923/J.IJEE.20120206.01

M. Mustafa, S. Abdelhady, A. Elweteedy

{"title":"Analytical Study of an Innovated Solar Power Tower (PS10) in Aswan","authors":"M. Mustafa, S. Abdelhady, A. Elweteedy","doi":"10.5923/J.IJEE.20120206.01","DOIUrl":"https://doi.org/10.5923/J.IJEE.20120206.01","url":null,"abstract":"The city of Aswan, located at the south of Egypt, is characterized by a very high level of solar density. The Solar Power Plant (SPT) technology using the Concentrated Solar Power Plant (CSP) is expected to soon enter the renewable energy field in Egypt. Fortunately, considerable amount of informat ion about the PS10, which is a co mmercial SPT of power 11 MW are availab le for performing considerable attractive analysis . A co mparative performance analysis is developed between the existing PS10 in Sanlucar la Mayor- Spain, and a modified one of similar specifications located in Aswan. In this study, the PS10 So lar Po wer Tower systems (SPT) design-layout is revised to suit the solar data in Aswan. Accordingly, the location of each heliostat is reviewed, analysed and modified. The solar irradiance model and sunshine duration (solar hours) of the existing plant in Spain are co mpared to those in Aswan. The study includes optical and geometric analysis of both SPTs. The annual average efficiency and SPT performance values in the existing and intended power stations are compared. Su itable mod ifications are introduced in the SP10 to fit the conditions in Aswan according to the innovated field of the heliostats. The main objective of this study is to find the relative advantage of installation of the CSPs in Aswan compared to the other locations in the world. The innovated model of PS10 in Aswan is believed to be more pro mising than that of the original one in Spain.","PeriodicalId":14041,"journal":{"name":"International journal of energy engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75065245","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: 33

Biodiesel: Fuel for the Future (A Brief Review) 生物柴油:未来的燃料(综述)

International journal of energy engineering Pub Date : 2012-12-01 DOI: 10.5923/J.IJEE.20120205.06

R. Owolabi, A. Adejumo, A. Aderibigbe

引用次数: 31

Power Quality Issues of Induction Generators in Different Operating Modes 感应发电机在不同运行模式下的电能质量问题

International journal of energy engineering Pub Date : 2012-12-01 DOI: 10.5923/J.IJEE.20120206.05

K. Sandhu, Sudhir Sharma

引用次数: 1

Parametric Studies of a Hybrid Desiccant Cooling System 混合干燥剂冷却系统的参数化研究

International journal of energy engineering Pub Date : 2012-12-01 DOI: 10.5923/J.IJEE.20120205.09

Pradeep Patanwar, S. Shukla

引用次数: 5

Thermal Stress Analysis in Structural Elements of HRSG Casing HRSG套管结构构件热应力分析

International journal of energy engineering Pub Date : 2012-12-01 DOI: 10.5923/J.IJEE.20120205.03

H. Shin, D. Kim, Hyungjun Ahn, Sangmin Choi, G. Myoung

{"title":"Thermal Stress Analysis in Structural Elements of HRSG Casing","authors":"H. Shin, D. Kim, Hyungjun Ahn, Sangmin Choi, G. Myoung","doi":"10.5923/J.IJEE.20120205.03","DOIUrl":"https://doi.org/10.5923/J.IJEE.20120205.03","url":null,"abstract":"Heat recovery steam generators (HRSGs) are arranged at the tail end of gas turbines in co mb ined cycle power plants (CCPPs), and are designed to withstand the hot gas environment approaching 600℃. In addition to higher thermal to power efficiency, CCPPs show superior response characteristics compared to those of other conventional steam power plants. For that reason, frequent load changes on the system, which som etimes include daily start and stop (DSS) operation, would impose additional burden on the structural elements. The main objective o f this work is to analy ze the thermal stress conditions as related to the observed failure on the structural elements of HRSG casing, and to find root causes of failure of mechanical integrity. To achieve this goal, field measurements were performed to record temperatures of wall and stiffener of the casing fro m a real plant in operation. To consider the effect of hot gas on the casing, computational fluid dynamic (CFD) analysis of gas flow inside the HRSG with appropriate wall conditions using FLUENT V12. Thermal stress analysis on the thin wall of the casing and stiffeners of HRSG was conducted with the temperature data from the CFD results, using ANSYS Workbench V12. Su mmarizing the computational results, some limited ideas were presented which would be useful to prevent damages.","PeriodicalId":14041,"journal":{"name":"International journal of energy engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89085619","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: 2

Effect of Exhaust Gas Recirculation (EGR) on Performance and Emission of a Compression Ignition Engine with Staged Combustion (Insertion of Unburned Hydrocarbon) 废气再循环(EGR)对分级燃烧(插入未燃烃)压燃式发动机性能及排放的影响

International journal of energy engineering Pub Date : 2012-12-01 DOI: 10.5923/J.IJEE.20120206.03

J. Hussain, K. Palaniradja, N. Alagumurthi, R. Manimaran

引用次数: 23

An Overview on Application of Exergy and Energy for Determination of Solar Drying Efficiency 太阳能干燥效率测定中火用与能量的应用综述

International journal of energy engineering Pub Date : 2012-12-01 DOI: 10.5923/J.IJEE.20120205.01

L. Bennamoun

引用次数: 42

Voltage Stability Enhancement using VSWT with Direct Drive Synchronous Generators 利用VSWT直接驱动同步发电机增强电压稳定性

International journal of energy engineering Pub Date : 2012-12-01 DOI: 10.5923/J.IJEE.20120205.10

R. Jeevajyothi, D. Devaraj

{"title":"Voltage Stability Enhancement using VSWT with Direct Drive Synchronous Generators","authors":"R. Jeevajyothi, D. Devaraj","doi":"10.5923/J.IJEE.20120205.10","DOIUrl":"https://doi.org/10.5923/J.IJEE.20120205.10","url":null,"abstract":"Th is paper investigates about the enhancement in grid voltage stability while integrating the large-scale variable speed wind turbine (VSWT) with direct drive synchronous generators (DDSG). A dynamic modeling and simulat ion of a grid connected VSWT driven DDSG with controllable power inverter strategies suitable for the study was developed, tested and verified. Th is dynamic model with its control scheme can regulate real power, maintain reactive power and generate voltage at different wind speeds. For th is paper, studies were conducted on a standard IEEE 14 bus system augmented by a rad ially connected wind power p lant (WPP) which contains 100 wind turbine generators (WTG). The studies include examin ing the voltage stability (λ-V) curves, voltage magnitude, reactive power delivered, loading margin and voltage collapse of the system. These voltage stability studies are done for the normal state as well as for line contingencies. It is found that large scale VSWT with DDSG at the transmission level has the potential to imp rove the long-term voltage stability of the grid by injecting react ive power with the help of controllable power inverter strategy.","PeriodicalId":14041,"journal":{"name":"International journal of energy engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89691022","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