Journal of King Saud University, Engineering Sciences最新文献_第2页

Tribological performance of volcanic rock (perlite)-filled phenolic-based brake friction composites 火山岩(珍珠岩)填充酚醛基制动摩擦复合材料的摩擦学性能

Journal of King Saud University, Engineering Sciences Pub Date : 2024-12-01 DOI: 10.1016/j.jksues.2021.12.010

Tej Singh

引用次数: 0

Producer gas stove: Design, fabrication, and evaluation of thermal performance 煤气炉:热性能的设计、制造和评价

Journal of King Saud University, Engineering Sciences Pub Date : 2024-12-01 DOI: 10.1016/j.jksues.2021.10.009

A.A.P. Susastriawan, Y. Purwanto, B.W. Sidharta, G. Wahyu, T. Trisna, R.A. Setiawan

{"title":"Producer gas stove: Design, fabrication, and evaluation of thermal performance","authors":"A.A.P. Susastriawan, Y. Purwanto, B.W. Sidharta, G. Wahyu, T. Trisna, R.A. Setiawan","doi":"10.1016/j.jksues.2021.10.009","DOIUrl":"10.1016/j.jksues.2021.10.009","url":null,"abstract":"<div><div>Traditional biomass stoves are widely used for cooking purposes in developing countries due to their simple construction. However, the problems of low thermal efficiency, large feedstock consumption, and high pollutant emissions are encountered in the conventional design. The gasification-based stove has also been presently and highly considered when encountering these problems. Therefore, this study aims to (1) develop a producer gas stove and (2) investigate the effect of bluff-body shape, equivalence ratio, and feedstock on the thermal performance of the stove. The results showed that the performance of the producer gas stove was affected by the bluff-body shape of the burner, equivalence ratio, and feedstock type. Stable flames were further observed when the bluff body B was attached to the burner. The highest thermal performance was obtained by using a bluff body B, operated at an equivalence ratio of 0.5 with blended feedstock of rice husksawdust. In addition, the highest heating rate and thermal efficiencies were 2.27 kW and 17.6%, respectively.</div></div>","PeriodicalId":35558,"journal":{"name":"Journal of King Saud University, Engineering Sciences","volume":"36 8","pages":"Pages 701-708"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91088966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Intelligent reactive power control of a renewable integrated hybrid energy system model using static synchronous compensators and soft computing techniques 基于静态同步补偿器和软计算技术的可再生综合混合能源系统模型无功控制

Journal of King Saud University, Engineering Sciences Pub Date : 2024-12-01 DOI: 10.1016/j.jksues.2022.03.004

Pabitra Kumar Guchhait , Samrat Chakraborty , Debottam Mukherjee , Ramashis Banerjee

{"title":"Intelligent reactive power control of a renewable integrated hybrid energy system model using static synchronous compensators and soft computing techniques","authors":"Pabitra Kumar Guchhait , Samrat Chakraborty , Debottam Mukherjee , Ramashis Banerjee","doi":"10.1016/j.jksues.2022.03.004","DOIUrl":"10.1016/j.jksues.2022.03.004","url":null,"abstract":"<div><div>Modern power system faces a severe problem of instability, largely due to inconsistent reactive power. It causes damage to the power grid within a few milliseconds. Therefore, proper management of reactive power under disturbing situations plays a key role in its safe operation. Devices such as flexible alternating current transmission systems (FACTS) accurately manage the system’s reactive power in accordance with the load demand. In this study, a new reactive power control strategy is employed for optimization of the reactive power along with the stability improvement of the system under different small perturbed conditions. Therefore, this study focuses on controlling the reactive power for an isolated wind-diesel hybrid power system model (WDHPSM) with the aid of a static synchronous compensator (STATCOM) together with the use of an integral minus proportional derivative (IPD) controller keeping a derivative-based filter (IPDF) as a secondary controller for better utilization of its purpose. The obtained results are compared when the no-control strategy is applied in the model. Another comparison has been done between the multiple applied soft computing techniques (oppositional harmonic search, ant lion optimization, binary-coded genetic algorithm, and symbiosis organisms search) that optimize the parameters of the controller of WDHPSM.</div></div>","PeriodicalId":35558,"journal":{"name":"Journal of King Saud University, Engineering Sciences","volume":"36 8","pages":"Pages 562-571"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80089166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Removal of fog from hazy images and their restoration 从朦胧图像中去除雾及其恢复

Journal of King Saud University, Engineering Sciences Pub Date : 2024-12-01 DOI: 10.1016/j.jksues.2022.01.002

Vidya Nitin More, Vibha Vyas

{"title":"Removal of fog from hazy images and their restoration","authors":"Vidya Nitin More, Vibha Vyas","doi":"10.1016/j.jksues.2022.01.002","DOIUrl":"10.1016/j.jksues.2022.01.002","url":null,"abstract":"<div><div>The prominent reason behind road accidents during the winter season is the presence of fog in the environment. Other important reasons for the degradation of visibility are haze, smog, clouds and rain. In the process of developing the automation of a vehicle on the road, visibility and contrast are the most affected parameters of the captured image or video. Road accidents can be prevented if images taken in foggy conditions are processed to improve their quality and legibility. There are different methods available to improve the quality of foggy images, like color attenuation prior method, dark channel prior method, and fog removal using region detection network.</div><div>The atmospheric particles, such as water droplets, which cause the absorption and scattering of light, further produce attenuation and air-light. The present research work is based on the Dark Channel Prior (DCP) method. The DCP method needs to find the transmission map, which gives the strength of the fog in the image. Major parts of this algorithm are the estimation of the dark channel, finding the transmission map, refining the transmission map, and reconstructing the image without haze. The proposed algorithm has also been implemented using a Raspberry pi. This research work focuses on the improvement of the reconstructed de-hazed image using various filters. The results are compared based on Contrast Gain (CG) and Color Index (CI) parameters. Many times, this application needs the object detection phase, which uses various methods; however, the scope of this paper is limited to the reconstruction of the image after the removal of fog.</div></div>","PeriodicalId":35558,"journal":{"name":"Journal of King Saud University, Engineering Sciences","volume":"36 8","pages":"Pages 600-610"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84824067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Financial risk management in the construction projects 建设项目财务风险管理

Journal of King Saud University, Engineering Sciences Pub Date : 2024-12-01 DOI: 10.1016/j.jksues.2022.05.001

Abdussalam Shibani, Dyaa Hasan, Jalal Saaifan, Heba Sabboubeh, Mohamad Eltaip, Messaoud Saidani, Nawal Gherbal

{"title":"Financial risk management in the construction projects","authors":"Abdussalam Shibani, Dyaa Hasan, Jalal Saaifan, Heba Sabboubeh, Mohamad Eltaip, Messaoud Saidani, Nawal Gherbal","doi":"10.1016/j.jksues.2022.05.001","DOIUrl":"10.1016/j.jksues.2022.05.001","url":null,"abstract":"<div><div>Construction risk can be described as the possibility of an incident that will harm the project’s feasibility. Different threats that impact businesses may be found in the construction industry as elsewhere. Moreover, construction projects face significant risks that put building projects at the risk of cost, over time, and poor standard of execution. In the last two years, Lebanon has been suffering from a severe economic crisis, which has affected a large number of businesses and industries, specifically the construction industry. Therefore, this article aims to identify, classify, and analyse the most significant risks inherent in the Lebanese construction industry with special emphasis on the financial and economic risk category and eventually establish a conclusion in this regard. To achieve the aims of this research, the data were collected by conducting a questionnaire survey among experts in the Lebanese construction industry. The results showed that the construction industry in Lebanon is exposed to many risk sources, internal and external, and the most important ones are financial risks such as fluctuation of the currency, inflation, and lack of solvency. Finally, the importance and benefits of implementing risk management are discussed in this research as well as the barriers to its effective implementation.</div></div>","PeriodicalId":35558,"journal":{"name":"Journal of King Saud University, Engineering Sciences","volume":"36 8","pages":"Pages 552-561"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76062529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Slip analysis of prestressed steel-concrete continuous composite beam 预应力钢-混凝土连续组合梁滑移分析

Journal of King Saud University, Engineering Sciences Pub Date : 2024-12-01 DOI: 10.1016/j.jksues.2022.01.007

Jun Sun , Zhenhong Yue , Yan He , Yasir Ibrahim Shah

引用次数: 0

Au-doped mesoporous SiO2 scattering layer enhances light harvesting in quasi Solid-State dye-sensitized solar cells 金掺杂介孔SiO2散射层增强准固态染料敏化太阳能电池的光捕获

Journal of King Saud University, Engineering Sciences Pub Date : 2024-12-01 DOI: 10.1016/j.jksues.2021.07.007

Devita Rachmat , Ra'idah Syarifah , Intan Paramudita , Nur Fadhilah , Muhammad Husain Haekal , Ruri Agung Wahyuono , Rachmat Hidayat , Rozalina Zakaria , Veinardi Suendo , Doty Dewi Risanti

{"title":"Au-doped mesoporous SiO2 scattering layer enhances light harvesting in quasi Solid-State dye-sensitized solar cells","authors":"Devita Rachmat , Ra'idah Syarifah , Intan Paramudita , Nur Fadhilah , Muhammad Husain Haekal , Ruri Agung Wahyuono , Rachmat Hidayat , Rozalina Zakaria , Veinardi Suendo , Doty Dewi Risanti","doi":"10.1016/j.jksues.2021.07.007","DOIUrl":"10.1016/j.jksues.2021.07.007","url":null,"abstract":"<div><div>This study investigates the morphological effect of different Au-doped SiO<sub>2</sub> scattering layers on the performance of dye-sensitized solar cells (DSSCs). Particularly, the SiO<sub>2</sub> sources were varied to yield different geometries, i.e., tetraethyl orthosilicate (TEOS) templated SiO<sub>2</sub>, Sidoarjo mud (LuSi) extracted SiO<sub>2</sub>, and commercial silica glass sphere. The microstructure, as well as physical, electronic, and optical properties of different Au-doped SiO<sub>2</sub> particles, were characterized using SEM-EDX, TEM, BET, XRD, and various spectroscopy techniques. The photoelectrochemical performance of quasi-solid state DSSCs was indicated by current density–voltage (J-V) response, external quantum efficiency spectra, and the impedance response. The results indicate that the performance of TiO<sub>2</sub>-based DSSCs is enhanced quite significantly due to the improved photocurrent generation and fill factor. The short circuit current density is found up to 370% higher (and hence, the conversion efficiency) than the reference cell upon incorporating Au-doped crystalline SiO<sub>2</sub> extracted from LuSi (V<sub>oc</sub> = 0.89 V, J<sub>sc</sub> = 1.28 mA‧cm<sup>−2</sup>, FF = 0.65, and η = 0.75%). This substantial photocurrent enhancement stems from the combined effect of efficient light scattering by submicron SiO<sub>2</sub> particles, surface plasmon resonance, and reduced interfacial recombination by SiO<sub>2</sub> insulation. In addition, the optimum size of SiO<sub>2</sub> particles is deduced as the results indicate the size-scattering dependency which controls the gain and loss of photocurrent due to the type of scattering.</div></div>","PeriodicalId":35558,"journal":{"name":"Journal of King Saud University, Engineering Sciences","volume":"36 8","pages":"Pages 581-590"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83362149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Acknowledgment to Reviewers

Journal of King Saud University, Engineering Sciences Pub Date : 2024-12-01 DOI: 10.1016/j.jksues.2024.12.002

Anis H. Fakeeha (Editor-in-Chief)

引用次数: 0

Evaluation of flaxseed hydrocolloid’s potential in improving oil recovery 亚麻籽水胶体提高采收率潜力评价

Journal of King Saud University, Engineering Sciences Pub Date : 2024-12-01 DOI: 10.1016/j.jksues.2023.10.003

Birzhan Mazhit, Azza Hashim Abbas, Peyman Pourafshary

{"title":"Evaluation of flaxseed hydrocolloid’s potential in improving oil recovery","authors":"Birzhan Mazhit, Azza Hashim Abbas, Peyman Pourafshary","doi":"10.1016/j.jksues.2023.10.003","DOIUrl":"10.1016/j.jksues.2023.10.003","url":null,"abstract":"<div><div>The use of natural materials to improve oil recovery and production is believed to be a suitable method. The current study examined hydrocolloids extracted from flaxseed as a viscosifying agent for improved and enhanced oil recovery EOR. It aimed to investigate the effect of concentration, temperature, salinity, and ageing time on the rheology of the flaxseed gel solution (FGS). The study also highlighted the solution’s performance at the core level for carbonate reservoirs. The FGS was successfully extracted by soaking and heating at 70 °C. Fourier-transform infrared (FTIR) spectroscopy results showed polysaccharide dominance in the mucilage. The rheology outcomes showed that the FGS was able to increase the water viscosity by 5–17 cp at 25 °C. Different concentrations of the FGS preserved its viscosity at temperatures of 25–45 °C. The salinity reduced the gel’s viscosity, especially above 2.5 wt%. A 50 g/L solution successfully tolerated all the tested salinities and the temperature range at all shear rates. A reduction in viscosity was observed during the first five days of ageing due to biological degradation caused by bacteria. Ageing had no major influence between 5 and 10 days. The FGS resulted in a 12 % incremental oil recovery. The sweep efficiency improved due to the 84 % mobility enhancement. This study confirms the possibility of deploying hydrocolloids as a natural viscosifier to improve the oil recovery in Kazakhstan’s oil reservoir conditions.</div></div>","PeriodicalId":35558,"journal":{"name":"Journal of King Saud University, Engineering Sciences","volume":"36 8","pages":"Pages 611-618"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136056392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Special Issue – Recent advances in Mechanical Engineering

Journal of King Saud University, Engineering Sciences Pub Date : 2024-12-01 DOI: 10.1016/j.jksues.2024.12.001

Mohamed El-Sayed Ali

引用次数: 0