University of Khartoum Engineering Journal最新文献_第9页

Hybrid liquid desiccant air-conditioning system with a direct expansion evaporative cooler 带有直接膨胀式蒸发冷却器的混合式液体干燥剂空调系统

University of Khartoum Engineering Journal Pub Date : 2022-09-07 DOI: 10.53332/kuej.v11i2.860

Salim Obeid, Kamal Nasreldin Abdalla, Yousef Al Horr

引用次数: 0

Evaluation: Screening, Analysis, and Countermeasures for Bridge Scour for AL-Manshia Bridge 曼什大桥桥梁冲刷评价:筛选、分析及对策

University of Khartoum Engineering Journal Pub Date : 2021-12-27 DOI: 10.53332/kuej.v11i2.701

E. Sharf, Qabas O.H. Khaleefa, Bouran A.H. Mohammed

引用次数: 0

Chromium (VI) Removal Methods from Effluents – A Review Article 污水中铬(VI)的去除方法综述

University of Khartoum Engineering Journal Pub Date : 2021-12-27 DOI: 10.53332/kuej.v11i2.700

N. Bashir

{"title":"Chromium (VI) Removal Methods from Effluents – A Review Article","authors":"N. Bashir","doi":"10.53332/kuej.v11i2.700","DOIUrl":"https://doi.org/10.53332/kuej.v11i2.700","url":null,"abstract":"Heavy metal is one of the major environmental and ecological problems in this world. The presence of heavy metals in water andwastewater causes toxic effects to the living beings and the environment. Compared to other heavy metals (such as Cr6+, Pb2+, Zn2+ etc.,) the presence of chromium in industrial effluents has become a major problem worldwide as hexavalent chromium is highly toxic to animals due to its ability to generate reactive oxygen species in cells. The excess amount of chromium affects the lungs and lead to respiratory disorders in the human beings. It also contaminates the soil and groundwater. Due to a large number of industries that generate hexavalent chromium in its effluents such as tanneries and electroplating industries, the chromium contamination in the wastewater and aqueous solutions exceeds the tolerance limits. Many remediation processes for removal of hexavalent chromium have been researched and reviewed extensively. Many methods are used to remove the chromium from the aqueous solutions and industrial effluents. This paper reviewed different remediation methods namely: the using of natural absorbent; the conventional chemical reduction method; the bio-absorbent method, nano-technology application; and other remediation methods. For each method, information about major parameters affecting theefficiency of removal of hexavalent chromium (Cr6+) from industrial effluent are stated. Brief discussion is included relating the different methods, in addition to some future aspects for the remediation process.","PeriodicalId":23461,"journal":{"name":"University of Khartoum Engineering Journal","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74015567","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

Monitoring System for Overhead Power Transmission Lines in Smart Grid System Using Internet of Things 基于物联网的智能电网架空输电线路监控系统

University of Khartoum Engineering Journal Pub Date : 2021-12-27 DOI: 10.53332/kuej.v11i2.703

Mortada. M. Abdulwahab, A. Suliman, Babiker M. Ahmed, Mohammed B. Elareefi, Ez Alarab E. Abd Elrahman, Ebraheem A. Arbab

{"title":"Monitoring System for Overhead Power Transmission Lines in Smart Grid System Using Internet of Things","authors":"Mortada. M. Abdulwahab, A. Suliman, Babiker M. Ahmed, Mohammed B. Elareefi, Ez Alarab E. Abd Elrahman, Ebraheem A. Arbab","doi":"10.53332/kuej.v11i2.703","DOIUrl":"https://doi.org/10.53332/kuej.v11i2.703","url":null,"abstract":"In the traditional systems, detection of the faults in the electric lines is more difficult. Detection of faults takes time more than repairing time. In most cases faults or problems in power transmission lines occur due to environmental disturbance. Advanced monitoring system of overhead transmission lines assists in saving human lives and helps in maintenance planning. Tension and loosening are examples of problems that result in the absence of high quality monitoring system. The objective of this paper is to do continuous monitoring of the atmospheric conditions and the sag status in the power transmission lines. The design consist of a group of sensors (distance sensor, wind speed sensor, pressure sensor and deviation sensor), which are used to monitor the atmospheric conditions, and send the records to main controller. The controllers transmit these measured values through Wi-Fi to the web page and display them in the channel graph. The recorded resulting data can be shown in a digital form at any time by selecting any point in the graph. The system is built up by using internet of things (IoT) monitoring technique and global positioning system (GPS) technology to provide the location and guarantee wide range of covering area of the smart grid. The experimental results include the date, time and value and is shown in graphical form to help the manager to analyze the system faults easily. The obtained results were reliable and correct. The results satisfied the goals of the paper and reveal that the use of IoT monitoring system of the transmission lines enhanced the quality of the service.","PeriodicalId":23461,"journal":{"name":"University of Khartoum Engineering Journal","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87782947","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

Design and Simulation of Ground Station (GS) Television Channel (TV CH) Group 地面站(GS)电视频道(TV CH)群设计与仿真

University of Khartoum Engineering Journal Pub Date : 2021-12-27 DOI: 10.53332/kuej.v11i2.702

Abdallah Tagalser Mohammed, A. Mustafa, Ashraf A. Osman

引用次数: 0

Modelling and Analysis of GPS Error Effect on the Zone and Energy Aware-AODV (ZEA-AODV) Protocol GPS误差对区域和能量感知- aodv (ZEA-AODV)协议影响的建模与分析

University of Khartoum Engineering Journal Pub Date : 2021-08-29 DOI: 10.53332/kuej.v11i1.149

Enas Abdalla Elhaj, M. A. H. Abbas

{"title":"Modelling and Analysis of GPS Error Effect on the Zone and Energy Aware-AODV (ZEA-AODV) Protocol","authors":"Enas Abdalla Elhaj, M. A. H. Abbas","doi":"10.53332/kuej.v11i1.149","DOIUrl":"https://doi.org/10.53332/kuej.v11i1.149","url":null,"abstract":"The Zone and Energy Aware protocol based on the Ad hoc On demand Distance Vector (AODV) protocol (ZEA-AODV) provides a superior performance compared to the classic AODV protocol when number of nodes is less than 70 [1]. ZEA-AODV protocol is using location and energy information to reduce energy consumption and routing overhead. It is a combination of the two proposed protocols, Zone-aware AODV (Z-AODV) protocol and Energy-Balanced AODV (EB-AODV) protocol. In [1], we assumed that each host knows its current location precisely. In this paper, Global Positioning System (GPS) error is considered, therefore, the standard GPS error is modelled by generating two samples for movement of a terminal by simulation. One of the movements is as a simulation of the actual movement, and the other one as a simulation of the error. Then both movements are provided to the terminal. This GPS error modelling is considered in the case of ZEA-AODV protocol to investigate the effect of such error on its performance. Using the simulation, it is found that, although the overall performance of ZEA-AODV protocol is degraded when GPS error is considered, but energy conservation is noticeably still better than that of normal AODV protocol.","PeriodicalId":23461,"journal":{"name":"University of Khartoum Engineering Journal","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73027064","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

Real Time Design of Wireless Sensor Network for Monitoring ionized Radiation using Raspberry Pi 基于树莓派的电离辐射监测无线传感器网络的实时设计

University of Khartoum Engineering Journal Pub Date : 2021-08-29 DOI: 10.53332/kuej.v11i1.146

Mortada. M. Abdulwahab, Sahar Abd Elgader Babiker Zedan

引用次数: 0

IMPROVING THE CAPACITY OF BORED PILES BY BASE GROUTING CASE STUDY; SINNAR BRIDGES PROJECT IN SUDAN 基底灌浆提高钻孔灌注桩承载力的实例研究苏丹Sinnar桥梁项目

University of Khartoum Engineering Journal Pub Date : 2021-08-29 DOI: 10.53332/kuej.v11i1.152

A. K. M. Zein

{"title":"IMPROVING THE CAPACITY OF BORED PILES BY BASE GROUTING CASE STUDY; SINNAR BRIDGES PROJECT IN SUDAN","authors":"A. K. M. Zein","doi":"10.53332/kuej.v11i1.152","DOIUrl":"https://doi.org/10.53332/kuej.v11i1.152","url":null,"abstract":"This paper presents and discusses the experience gained through the application of base grouting technique applied for improving the capacity of large diameter bored piles foundation system for two heavily loaded bridge structures. Many large diameter bored piles were installed in Sinnar bridges project, Sudan and base treated by cement grout pumped at high pressures to preload the soil beneath their tips. The post construction operation was conveniently implemented for 106 bored piles of 1.5 to 2.0m diameter and 42 to 50m long utilizing equipments that are not sophisticated or expensive. The successful application of base grouting provided valuable insight into the technique’s merits over the currently practiced construction techniques such that the pile’s base capacity component is realized within service displacement limits. The study results indicate that base grouting can substantially improve the ultimate capacities by 2.15 to 2.62 times the values usually estimated for ungrouted bored piles of the same dimensions installed in similar soil conditions. From a foundation design viewpoint, safety factors much lower than those often used for ungrouted bored piles can be adopted for grouted piles of the same dimensions installed at a given site. Otherwise, the dimensions of grouted piles can be reduced whilst providing equivalent capacities as those of ungrouted piles with larger sizes. This will lead to a cost effective foundation design, improve the construction methodology and eventually enhance the overall performance of bored piles foundation when used in future projects.","PeriodicalId":23461,"journal":{"name":"University of Khartoum Engineering Journal","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75496264","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

Production of Poly Aluminum Chloride (PAC) from Local Material (Kaolin) 利用本地原料(高岭土)生产聚合氯化铝(PAC)

University of Khartoum Engineering Journal Pub Date : 2021-08-29 DOI: 10.53332/kuej.v11i1.150

Mohaid Abbas, Khalid Awad, Alfatih Dirar, M. E. Abdalla, Abdelshakour A. Elkareem

{"title":"Production of Poly Aluminum Chloride (PAC) from Local Material (Kaolin)","authors":"Mohaid Abbas, Khalid Awad, Alfatih Dirar, M. E. Abdalla, Abdelshakour A. Elkareem","doi":"10.53332/kuej.v11i1.150","DOIUrl":"https://doi.org/10.53332/kuej.v11i1.150","url":null,"abstract":"Poly aluminum chloride (PAC) has many applications such as water treatment, separation of slurry in industrial processes. The basic raw material for PAC production is aluminum oxide ore such as Kaolin, Bauxite, Mica and Silliminite. In this study Kaolin was used and investigated carefully. Kaolin is abundant in the Sudan. The chemical composition is ,CaO, MgO, , L.O.I. For the production of liquid PAC, Kaolin was activated by calcination process to produce intermediate product (alumina,). Then the alumina extracted from calcined Kaolin was leached with hydrochloric acid to produce aluminum chloride. Finally base is added to aluminum chloride to produce PAC. The effects of the various parameters of production process (calcination temperature, acid concentration, residence time, ratio Kaolin-acid W/W) were investigated and the optimum conditions were found. The results showed that the optimum calcination temperature for the samples used, is 1000˚C with 3 hour residence time with alumina extract of 28.76 ppm .The optimum leaching conditions were determined and found at: Kaolin grain size, 200 meshes, Temperature, 90 ˚C, Residence Time 30 min, Acid concentration of 8N (HCL), which yielded 59.89 ppm of alum extract.","PeriodicalId":23461,"journal":{"name":"University of Khartoum Engineering Journal","volume":"426 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83561822","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

Experimental evaluation of transmission length equations for pre-tensioned hollow core slabs 预张拉空心芯板传递长度方程的试验评定

University of Khartoum Engineering Journal Pub Date : 2021-08-29 DOI: 10.53332/kuej.v11i1.147

A. Abdelatif, Mujtaba M. Shanan

引用次数: 0