Al-Qadisiyah Journal for Engineering Sciences最新文献_第4页

The assessment of using fiber produced from plastic broom bristles on impact property of Normal-weight concrete slabs 塑料刷毛纤维对中厚混凝土板冲击性能的影响

Al-Qadisiyah Journal for Engineering Sciences Pub Date : 2023-03-30 DOI: 10.30772/qjes.v16i1.885

Zayd Al-obaidi

引用次数: 0

Utilization of date pits derived Bio-adsorbent for heavy metals in wastewater treatment: Review 枣核生物吸附剂在重金属废水处理中的应用研究进展

Al-Qadisiyah Journal for Engineering Sciences Pub Date : 2023-03-30 DOI: 10.30772/qjes.v16i1.910

A. Ghanim

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Performance of reinforced concrete elements retrofitted with SIFCON under elevated temperatures 高温下经SIFCON改造的钢筋混凝土构件的性能

Al-Qadisiyah Journal for Engineering Sciences Pub Date : 2023-03-01 DOI: 10.30772/qjes.v16i1.969

H. H. Alzamili, A. M. Elsheikh

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Numerical investigation of using earth-air heat exchangers to reduce building cooling and heating loads in southern Iraq 采用土-空气换热器降低伊拉克南部建筑冷热负荷的数值研究

Al-Qadisiyah Journal for Engineering Sciences Pub Date : 2022-12-30 DOI: 10.30772/qjes.v15i4.888

H. Salem, Alaa Almosawi

{"title":"Numerical investigation of using earth-air heat exchangers to reduce building cooling and heating loads in southern Iraq","authors":"H. Salem, Alaa Almosawi","doi":"10.30772/qjes.v15i4.888","DOIUrl":"https://doi.org/10.30772/qjes.v15i4.888","url":null,"abstract":"The Ground Air Heat Exchanger (EAHE) is an integrated passive heating and cooling system for many greenhouses, industrial and residential building applications. Reduces heating and cooling loads by transferring heat between ventilated air and the ground. In this paper, the performance of EAHE was studied numerically using the ESP-r program under weather and soil conditions in Al-Diwaniyah city (southern Iraq), connecting the pipe to a building model and testing it during the summer and winter months. In the case of summer, the results indicated a decrease in the temperature of the air supplied to the air-conditioned space, where the temperature reached 37.42 ° C, 40.09 ° C and 39.93 ° C, while the temperature of the outside air was 47.09 ° C, 47.45 ° C and 48.48 ° C during the summer. July, August and September respectively. In the case of the winter months, the air leaving the tube is heated to a temperature of 16.38°C, 13.99°C, 16.42°C, and 16.42°C, when the outside air temperature is 3.33°C, -0.01°C and 5.37° percentage during December, January and February, respectively. The use of this type of heat exchanger achieved a reduction of more than 10 ° C during the summer and an increase of more than 13 ° C in the winter.","PeriodicalId":227530,"journal":{"name":"Al-Qadisiyah Journal for Engineering Sciences","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128283800","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

Numerical and experimental analyzes of forming parameters of low carbon steel 低碳钢成形参数的数值与实验分析

Al-Qadisiyah Journal for Engineering Sciences Pub Date : 2022-12-30 DOI: 10.30772/qjes.v15i4.854

K. Mansor

引用次数: 0

Removal of methylene blue dye from simulated wastewater by cement kiln dust 水泥窑粉尘去除模拟废水中的亚甲基蓝染料

Al-Qadisiyah Journal for Engineering Sciences Pub Date : 2022-12-30 DOI: 10.30772/qjes.v15i4.876

Malak A. Mashjel, H. Al.Tameemi

引用次数: 0

Influence of intake air temperature on the performance of gasoline engines using a different type of fuel 进气温度对使用不同类型燃料的汽油机性能的影响

Al-Qadisiyah Journal for Engineering Sciences Pub Date : 2022-12-30 DOI: 10.30772/qjes.v15i4.806

Solin Muhammad, Iyd Maree, Ramzi Ibraheem

{"title":"Influence of intake air temperature on the performance of gasoline engines using a different type of fuel","authors":"Solin Muhammad, Iyd Maree, Ramzi Ibraheem","doi":"10.30772/qjes.v15i4.806","DOIUrl":"https://doi.org/10.30772/qjes.v15i4.806","url":null,"abstract":"The aim of the present study is to investigate the effect of Intake air temperature on the performance of gasoline engines. Various factors are taken that affect the performance of four-stroke gasoline engines. Changes in air intake temperature have a significant impact on the performance of a petrol engine. Consequently, an increase or decrease in the global ambient temperature will impact the performance and air quality of gasoline engines in particular. therefore, this investigation will discover the hot value of intake air temperatures that effects engine performance. This study tested two Kurdistan-Iraq gasoline kinds at different intake temperatures (25Co, 35Co, 45Co, and 50Co). Experiments utilized a four-stroke spark ignition _engine that operated at various rates of speeds (1300, 1500, 1800, 2000, 2300 and 2500 revolutions per minute) under a half load with a 50% throttle opening. The experimental outcomes were compared with Ricardo Wave software simulations. The Ricardo Wave's theoretical outcomes were in good agreement with the experiment data it showed a near 5% to 10% variance between simulation and practical data. Additionally, utilizing fuels having higher RON increases brake power owing to gasoline's greater hydrogen content and the engine's high octane fuel requirement. Also, lower inlet air temperatures would be denser (more oxygen) and offer a larger mass flow during each piston cycle. Hence, due to those factors, brake power was enhanced by reducing intake temp and raising RON. Generally, the experiment results demonstrated that utilizing higher octane number gasoline under lower intake temperature improved engine performance which demonstrates higher power, torque, and efficiency with lower bsfc compared to utilizing higher intake temperature and lower octane gasoline.","PeriodicalId":227530,"journal":{"name":"Al-Qadisiyah Journal for Engineering Sciences","volume":"410 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116243249","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

Reducing the viscosity of missan heavy crude oil using combinations of low molecular weight hydrocarbon compounds 利用低分子量烃类化合物的组合降低密桑重质原油的粘度

Al-Qadisiyah Journal for Engineering Sciences Pub Date : 2022-12-30 DOI: 10.30772/qjes.v15i4.878

Eman Saasaa, Rafid K. Abbas, S. Alsamaq

{"title":"Reducing the viscosity of missan heavy crude oil using combinations of low molecular weight hydrocarbon compounds","authors":"Eman Saasaa, Rafid K. Abbas, S. Alsamaq","doi":"10.30772/qjes.v15i4.878","DOIUrl":"https://doi.org/10.30772/qjes.v15i4.878","url":null,"abstract":"This work studied the facilitation of the transportation of Missan heavy crude oil characterized with high viscosity 84.61 cp at 15 °C, low API 23.1, by reducing its viscosity from break down asphaltene agglomerates using five solvents with some novel combinations of chemical additives were used for this study (naphtha & toluene, naphtha & xylene, naphtha & kerosene, toluene & kerosene, and xylene & kerosene).The viscosity of crude oil was measured after being treated with these chemicals at different concentrations (4, 8, and 12 weight%) and temperatures 15, 25, 35, and 45 °C. It has been found that increasing the concentration of naphtha with xylene from 4% to 12% causes a decrease in viscosity, from 48.62 cp at 15°C to 30.11 cp. The viscosity of a mixture of naphtha and kerosene drops from 50.15 cp at 15°C to 31.70 cp when the concentration is raised from 4% to 12%. The addition of toluene to kerosene causes the viscosity to drop from 51.76 cp at 15°C to 33.67 cp when the concentration of toluene is raised from 4% to 12%. Increasing the xylene concentration from 4% to 12% in kerosene led to a decrease in viscosity from 53.65 cp at 15°C to 34.88 cp at the same temperature. The findings of the present work could be applied to the petroleum industry for the purpose of transporting heavy oil of Missan or any other heavy crude.","PeriodicalId":227530,"journal":{"name":"Al-Qadisiyah Journal for Engineering Sciences","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121376495","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

List of the academic editors of Al-Qadisiyah journal for engineering sciences for the period from January 2020 to the December 2022 2020年1月至2022年12月基地组织工程科学期刊学术编辑名单

Al-Qadisiyah Journal for Engineering Sciences Pub Date : 2022-12-30 DOI: 10.30772/qjes.v15i4.989

N. Hamza, Ali Fahem

引用次数: 0

Analysis of aerodynamics around tall buildings with several configurations 几种结构高层建筑周围空气动力学分析

Al-Qadisiyah Journal for Engineering Sciences Pub Date : 2022-12-30 DOI: 10.30772/qjes.v15i4.855

Ahmed Al-Saadi

{"title":"Analysis of aerodynamics around tall buildings with several configurations","authors":"Ahmed Al-Saadi","doi":"10.30772/qjes.v15i4.855","DOIUrl":"https://doi.org/10.30772/qjes.v15i4.855","url":null,"abstract":"The streamlined exterior shapes of tall buildings are important to reduce the effect of the wind. Therefore, an examination of different techniques for the exterior design of tall buildings is required. This study aims to analyses some tall buildings to select the most streamlined design in order to reduce high wind risks. The benchmark used in the current study is a building with a height of 120 m and a triangular cross-section with a side length of 20 m. A square cross-section twisted building design is used as a modified model in tall buildings of about 120 m. The rotation angle of the building is 45° for each twisted path. Six configurations of this type of building are tested with different radiuses of fillet on their edges, which are 0, 1, 2, 3, 4, and 5 m respectively. All geometries of the buildings are created by SolidWorks, while mesh and simulations are achieved using ANSYS Fluent. Great agreement is obtained between the current results and the previous related study for the benchmark. Using twisted buildings with a fillet of 5 m can lead to a reduction of the drag coefficient of about 27.5% relative to the benchmark. Wind in a horizontal direction can be reduced by using twisted geometry. But in terms of separation, using a fillet with a large radius can lead to avoid early separation of air.","PeriodicalId":227530,"journal":{"name":"Al-Qadisiyah Journal for Engineering Sciences","volume":"208 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122414780","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