Kufa Journal of Engineering最新文献_第2页

TECHNOLOGY OF ADDITIVE MANUFACTURING: A COMPREHENSIVE REVIEW 增材制造技术：全面回顾

Kufa Journal of Engineering Pub Date : 2024-02-02 DOI: 10.30572/2018/kje/150108

Md. Imam Hossain, Md. Sakib Khan, Imrul Kayes Khan, K. Hossain, Yanzhao He, Xiaolong Wang

引用次数: 0

EFFECT OF USING WASTE FIBERS ON THE STRENGTH PROPERTIES OF SUSTAINABLE REACTIVE POWDER CONCRETE 使用废纤维对可持续活性粉末混凝土强度性能的影响

Kufa Journal of Engineering Pub Date : 2024-02-02 DOI: 10.30572/2018/kje/150107

S. Hasan

引用次数: 0

INVESTIGATION OF HYBRID PHOTOVOLTAIC /THERMAL SOLAR SYSTEM PERFORMANCE UNDER IRAQ'S CLIMATE CONDITIONS 伊拉克气候条件下的光伏/热混合太阳能系统性能调查

Kufa Journal of Engineering Pub Date : 2024-02-02 DOI: 10.30572/2018/kje/150101

Raad H. Abed, Nabeel A. Ghaydh

{"title":"INVESTIGATION OF HYBRID PHOTOVOLTAIC /THERMAL SOLAR SYSTEM PERFORMANCE UNDER IRAQ'S CLIMATE CONDITIONS","authors":"Raad H. Abed, Nabeel A. Ghaydh","doi":"10.30572/2018/kje/150101","DOIUrl":"https://doi.org/10.30572/2018/kje/150101","url":null,"abstract":"The research investigates the use of fins fastened to a solar panel's rear surface for passive cooling. The research compared solar modules with air cooling against modules with connected fins acting as a heat sink. The comparison was based on the former. The research studies the cooling of modules with fins using two different types of air: ventilation air and still air. By comparing the heat transmission by photovoltaic panels with and without fins, the research sought to analyses the effects of the environment and solar radiation on the performance of solar cells. The inquiry was done hypothetically. According to the findings, using fins for cooling reduced cell temperature and improved electrical and thermal efficiency. The estimated performance values of the PVT solar cell obtained by using the COMSOL program and the experimental measurements carried out during the daytime were reasonably in accord. The biggest reduction in cell temperature is (3.7ºC at noon), while the greatest increases in electrical and thermal efficiency are (16.54% and 58.3%, respectively). There is good agreement between experimental and numerical results.","PeriodicalId":123515,"journal":{"name":"Kufa Journal of Engineering","volume":"48 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139871385","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

SYNTHESIS AND CHARACTERISATION OF DIELECTRIC COMPOSITES PRODUCED FROM GLYCINE AND ALKALINE NIOBATE-BASED CERAMICS 甘氨酸和碱性铌酸盐基陶瓷电介质复合材料的合成与表征

Kufa Journal of Engineering Pub Date : 2024-02-02 DOI: 10.30572/2018/kje/150106

H. Mgbemere, Viktoriya Semeykina

{"title":"SYNTHESIS AND CHARACTERISATION OF DIELECTRIC COMPOSITES PRODUCED FROM GLYCINE AND ALKALINE NIOBATE-BASED CERAMICS","authors":"H. Mgbemere, Viktoriya Semeykina","doi":"10.30572/2018/kje/150106","DOIUrl":"https://doi.org/10.30572/2018/kje/150106","url":null,"abstract":"Glycine exhibits a little piezoelectric response when poled, while lead-free alkaline niobate-based ceramics show much higher responses. This research investigates the synthesis of a dielectric composite from a combination of glycine and (K0.45Na0.51Li0.04) (Nb0.85Ta0.1Sb0.04) O3 (KNNLST) ceramics. The mixed oxide ceramics synthesis method was used to produce the ceramics, while glycine powder was commercially procured. The composition range of the shaped and heat-treated composites is from no ceramics to 100 wt.% ceramics content. X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), dielectric studies, and hysteresis measurements were used to characterize the samples. The obtained phases transformed from the monoclinic phase in glycine to a two-phase orthorhombic-tetragonal phase in the ceramics. The samples’ morphology revealed a dense microstructure with some cracks, large porosity, and smaller grain sizes. The dielectric properties showed increasing dielectric constant and loss values with increasing ceramics content, while the ac conductivity also increased with rising ceramics content. Improving the range of ceramics led to polarization hysteresis graphs indicating ferroelectricity in the samples. The properties of the composites show they can be used in electromechanical devices.","PeriodicalId":123515,"journal":{"name":"Kufa Journal of Engineering","volume":"23 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139869127","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

EXPLORING THE CHARACTERISTICS AND EFFECTS OF DATE PALM WASTE ON SOME PROPERTIES OF CONCRETE: A REVIEW 探讨枣椰树废弃物的特性及其对混凝土某些性能的影响：综述

Kufa Journal of Engineering Pub Date : 2024-02-02 DOI: 10.30572/2018/kje/150104

M. Ahmed

引用次数: 0

THE IMPACT OF USING״ WELL STANDARD״ INDICATORS ON INTERNAL WORKPLACES CARBON EMISSIONS 使用״良好标准״指标对工作场所内部碳排放的影响

Kufa Journal of Engineering Pub Date : 2024-02-02 DOI: 10.30572/2018/kje/150105

Atyab Ali Naser, Hamzah S. Al-Mamoori

{"title":"THE IMPACT OF USING״ WELL STANDARD״ INDICATORS ON INTERNAL WORKPLACES CARBON EMISSIONS","authors":"Atyab Ali Naser, Hamzah S. Al-Mamoori","doi":"10.30572/2018/kje/150105","DOIUrl":"https://doi.org/10.30572/2018/kje/150105","url":null,"abstract":"The escalation of emissions has emerged as a prominent issue in contemporary society, garnering global attention from many countries. The need to use sustainable buildings to mitigate greenhouse gas emissions has been underscored by several sustainability standards, such as LEED and BREAM, in order to promote environmental protection. The WELL standard is a notable standard that places emphasis on the attainment of human health and well-being through the design and construction of the built environment. This followed the emergence of sustainability principles that sought to include social and human considerations in the building's efficiency. The research dilemma emerged due to a limited comprehension of the correlation between WELL standards and their efficacy in mitigating the carbon footprint of both buildings and people. The present study posits that the use of WELL indicators has the potential to reduce greenhouse gas emissions inside the workplace. The study employed a descriptive analytical methodology to ascertain the findings and deductions that certain attributes within the WELL v2 standard have the potential to mitigate carbon emissions. Notably, the Well innovation feature emerged as a significant contributor, as it promotes the inclusion of greenhouse gas management within a comprehensive framework centered on health and well-being.","PeriodicalId":123515,"journal":{"name":"Kufa Journal of Engineering","volume":"45 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139810857","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

WASTEWATER SLUDGE ASH IN THE PRODUCTION OF A NOVEL COLD MIX ASPHALT (CMA): DURABILITY, AGING AND TOXICITY CHARACTERISTICS 用废水污泥灰生产新型冷拌沥青（CMA）：耐久性、老化和毒性特征

Kufa Journal of Engineering Pub Date : 2024-02-02 DOI: 10.30572/2018/kje/150109

Hassan Al Nageim, Aaraf Al-Khuzaie, L. Seton, Jen M. Croft, Jonathan Drake

{"title":"WASTEWATER SLUDGE ASH IN THE PRODUCTION OF A NOVEL COLD MIX ASPHALT (CMA): DURABILITY, AGING AND TOXICITY CHARACTERISTICS","authors":"Hassan Al Nageim, Aaraf Al-Khuzaie, L. Seton, Jen M. Croft, Jonathan Drake","doi":"10.30572/2018/kje/150109","DOIUrl":"https://doi.org/10.30572/2018/kje/150109","url":null,"abstract":"New Sustainable with no CO2 emission cold mix asphalt (CMA) for road and highways surfacing is successfully developed from wastewater sludge ash normally sent to landfills. The Paper reports; durability in terms of water sensitivity, aging and contamination levels of heavy metals of the new developed novel CMA containing upgraded fly and bottom ash secondary cementitious materials from United Utilities fly and bottom ashes. Road engineers currently restricted the use of conventional CMA containing conventional limestone fillers (LF) for use in walkways and light trafficked roads only, as these mixtures needs from 2 to 24 months for curing. Conventional CMA mixtures also have high voidage contents and thus low traffic bearing capacity. The durability of these mixes is low especially in the UK and European countries where the climate is predominantly wet and cold.In Germany and France, ordinary Portland cement (OPC) replaced the filler used in traditional CMA. Although this allows the new CMA to be used in roads for light and heavy trafficked loads. The materials are not environmentally friendly, as one tone of cement releases approximately one tone of CO2 emission during their manufacturing process.\u0000The results of the new developed CMA are satisfying the British and European codes of practices requirements. The new novel mixtures are also; highly cost-effective compared with the use of Hot Mix Asphalt (HMA), has no CO2 emission during mixing construction, and has no health and safety issues compared with the HMA manufacturing and application process.","PeriodicalId":123515,"journal":{"name":"Kufa Journal of Engineering","volume":"35 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139810992","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

THE INFLUENCE OF SINTERING TEMPERATURE, SLIDING SPEED, AND SLIDING TIME ON THE WEAR RATE OF YTTRIUM-TETRAGONAL ZIRCONIA POLYCRYSTALS (3Y-TZP) FOR DENTAL APPLICATION 烧结温度、滑动速度和滑动时间对牙科用钇-四方氧化锆多晶体（3y-tzp）磨损率的影响

Kufa Journal of Engineering Pub Date : 2024-02-02 DOI: 10.30572/2018/kje/150102

Karrar A. Mzedawee, Iman J. Abed

引用次数: 0

INVESTIGATION OF HYBRID PHOTOVOLTAIC /THERMAL SOLAR SYSTEM PERFORMANCE UNDER IRAQ'S CLIMATE CONDITIONS 伊拉克气候条件下的光伏/热混合太阳能系统性能调查

Kufa Journal of Engineering Pub Date : 2024-02-02 DOI: 10.30572/2018/kje/150101

Raad H. Abed, Nabeel A. Ghaydh

{"title":"INVESTIGATION OF HYBRID PHOTOVOLTAIC /THERMAL SOLAR SYSTEM PERFORMANCE UNDER IRAQ'S CLIMATE CONDITIONS","authors":"Raad H. Abed, Nabeel A. Ghaydh","doi":"10.30572/2018/kje/150101","DOIUrl":"https://doi.org/10.30572/2018/kje/150101","url":null,"abstract":"The research investigates the use of fins fastened to a solar panel's rear surface for passive cooling. The research compared solar modules with air cooling against modules with connected fins acting as a heat sink. The comparison was based on the former. The research studies the cooling of modules with fins using two different types of air: ventilation air and still air. By comparing the heat transmission by photovoltaic panels with and without fins, the research sought to analyses the effects of the environment and solar radiation on the performance of solar cells. The inquiry was done hypothetically. According to the findings, using fins for cooling reduced cell temperature and improved electrical and thermal efficiency. The estimated performance values of the PVT solar cell obtained by using the COMSOL program and the experimental measurements carried out during the daytime were reasonably in accord. The biggest reduction in cell temperature is (3.7ºC at noon), while the greatest increases in electrical and thermal efficiency are (16.54% and 58.3%, respectively). There is good agreement between experimental and numerical results.","PeriodicalId":123515,"journal":{"name":"Kufa Journal of Engineering","volume":"33 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139811501","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

WASTEWATER SLUDGE ASH IN THE PRODUCTION OF A NOVEL COLD MIX ASPHALT (CMA): DURABILITY, AGING AND TOXICITY CHARACTERISTICS 用废水污泥灰生产新型冷拌沥青（CMA）：耐久性、老化和毒性特征

Kufa Journal of Engineering Pub Date : 2024-02-02 DOI: 10.30572/2018/kje/150109

Hassan Al Nageim, Aaraf Al-Khuzaie, L. Seton, Jen M. Croft, Jonathan Drake

{"title":"WASTEWATER SLUDGE ASH IN THE PRODUCTION OF A NOVEL COLD MIX ASPHALT (CMA): DURABILITY, AGING AND TOXICITY CHARACTERISTICS","authors":"Hassan Al Nageim, Aaraf Al-Khuzaie, L. Seton, Jen M. Croft, Jonathan Drake","doi":"10.30572/2018/kje/150109","DOIUrl":"https://doi.org/10.30572/2018/kje/150109","url":null,"abstract":"New Sustainable with no CO2 emission cold mix asphalt (CMA) for road and highways surfacing is successfully developed from wastewater sludge ash normally sent to landfills. The Paper reports; durability in terms of water sensitivity, aging and contamination levels of heavy metals of the new developed novel CMA containing upgraded fly and bottom ash secondary cementitious materials from United Utilities fly and bottom ashes. Road engineers currently restricted the use of conventional CMA containing conventional limestone fillers (LF) for use in walkways and light trafficked roads only, as these mixtures needs from 2 to 24 months for curing. Conventional CMA mixtures also have high voidage contents and thus low traffic bearing capacity. The durability of these mixes is low especially in the UK and European countries where the climate is predominantly wet and cold.In Germany and France, ordinary Portland cement (OPC) replaced the filler used in traditional CMA. Although this allows the new CMA to be used in roads for light and heavy trafficked loads. The materials are not environmentally friendly, as one tone of cement releases approximately one tone of CO2 emission during their manufacturing process.\u0000The results of the new developed CMA are satisfying the British and European codes of practices requirements. The new novel mixtures are also; highly cost-effective compared with the use of Hot Mix Asphalt (HMA), has no CO2 emission during mixing construction, and has no health and safety issues compared with the HMA manufacturing and application process.","PeriodicalId":123515,"journal":{"name":"Kufa Journal of Engineering","volume":"15 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139870761","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