Wasit Journal of Engineering Sciences最新文献_第3页

Numerical studies on Pulse tube refrigerator and the effect of changing the load of the regenerator on temperatures 脉冲管式制冷机的数值研究以及改变再生器负载对温度的影响

Wasit Journal of Engineering Sciences Pub Date : 2023-12-01 DOI: 10.31185/ejuow.vol11.iss3.481

Sarah Taher, Y. Al-lami, A. A. Al‐Hamadani

{"title":"Numerical studies on Pulse tube refrigerator and the effect of changing the load of the regenerator on temperatures","authors":"Sarah Taher, Y. Al-lami, A. A. Al‐Hamadani","doi":"10.31185/ejuow.vol11.iss3.481","DOIUrl":"https://doi.org/10.31185/ejuow.vol11.iss3.481","url":null,"abstract":"Devices for cryogenic cooling based on the Stirling cycle include pulse tube refrigerators. They are often employed in a variety of applications, including space exploration, superconductivity, and cryogenic research, where small and dependable cryogenic cooling is necessary. A working gas, commonly helium, is compressed and expanded in cycles within a closed system to operate a pulse tube refrigerator. The goal of theoretical research on pulse tube refrigerators is to comprehend the system's thermodynamic behavior and performance characteristics. In order to obtain greater cooling efficiency and lower temperatures, these studies are strivinge to improve the design parameters and operating conditions. To forecast the system's performance, theoretical models are taking into account a number of variables, including heat transfer, pressure drop, gas dynamics, and fluid characteristics. The outcome demonstrates how a system's temperature gradient. The ansys program was used to conduct a thermal simulation, as well use solidworks to draw geometry design the temperature gradient is 3 W/m2, reaching 47 K. The heat load increases as the temperature rises, reaching [43,58,79,90,111,156,] K at [3,4,5,6,8,10] W/m2. With a temperature gradient of 88.034k in the first order and 340 k in the second order, the simulation approach demonstrates that the best scenario achieved 105 K. The best example with a difference in heat load was at 3 W/m2, reaching 108K, Results revealed a 5% error rate temperature decline at the pulse tube.","PeriodicalId":184256,"journal":{"name":"Wasit Journal of Engineering Sciences","volume":" 48","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138615798","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

As an Application of Sustainability: Utilizing Processed Rice Husk to Remove Cadmium Ions Cd (II) From Aqueous Phase by Adsorption 作为可持续性的一种应用：利用稻壳吸附去除水相中的镉离子 Cd (II)

Wasit Journal of Engineering Sciences Pub Date : 2023-12-01 DOI: 10.31185/ejuow.vol11.iss3.446

Saja F. Rewaeh, H. Gzar, Marwaa K. Azeez

{"title":"As an Application of Sustainability: Utilizing Processed Rice Husk to Remove Cadmium Ions Cd (II) From Aqueous Phase by Adsorption","authors":"Saja F. Rewaeh, H. Gzar, Marwaa K. Azeez","doi":"10.31185/ejuow.vol11.iss3.446","DOIUrl":"https://doi.org/10.31185/ejuow.vol11.iss3.446","url":null,"abstract":"This study goals to reduce the importance of expensive commercial activated carbon while removing heavy metals from wastewater using cheap, locally available materials (rice husk). To accomplish this goal, a variety of pH values were tested, and it was found that batch studies at pH 5 had the best Cadmium ion removal effectiveness. 180 minutes was determined to be the ideal contact time for the process, and it was discovered that as contact time increased, adsorption effectiveness increased. 180 rpm is the recommended shaking speed, given studies on how agitation speed influences batch adsorption. The effectiveness of the rice husks capacity to eradicate Cadmium Cd (II) from aqueous solutions and absorb it, has assessed. The study revealed that Cd had a 98% effectiveness of removal. The recommended adsorbent's maximum Cd adsorption capability in a batch system was found to be 7.38 mg/g. Three models— Freundlich, Temkin, and Langmuir—were fitted to various equilibrium isothermal experiments. For this system, the experimental best fit was provided by the Freundlich isotherm model, with an value of 0.97. The equilibrium isotherms were discovered to be of a favorable type. When the correlation coefficient (R2) values of each curve for the four models are compared, it appears that the Elovich model best captures the kinetics of the Cadmium ions adsorption onto rice husk. Were the values (Elovich> pseudo-second order> intra-particle diffusion> Pseudo-First Order). According to the research, rice husk may be useful for filtering out wastewater from contaminants and impurities. So, It is a good alternative for expensive activated carbon.","PeriodicalId":184256,"journal":{"name":"Wasit Journal of Engineering Sciences","volume":" 15","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138619851","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

DC-RAN dynamic coverage methods to improve its performance 提高 DC-RAN 性能的 DC-RAN 动态覆盖方法

Wasit Journal of Engineering Sciences Pub Date : 2023-12-01 DOI: 10.31185/ejuow.vol11.iss3.463

Abbas S.K. Al-Tamimi, Basim K. J. Al-Shammari

{"title":"DC-RAN dynamic coverage methods to improve its performance","authors":"Abbas S.K. Al-Tamimi, Basim K. J. Al-Shammari","doi":"10.31185/ejuow.vol11.iss3.463","DOIUrl":"https://doi.org/10.31185/ejuow.vol11.iss3.463","url":null,"abstract":"Abstract \u0000In cellular networks, there are usually times when the density of the network changes at different times of the day, where congested areas attract a large demand for communications and data, which generates peak demand at specific times of the day, and vice versa also happens in the same area but at another time of the day, and in order to meet the needs of this changing demand the network must keep pace with changes in the density of the areas served. This can only be done if the network has a dynamic ability to handle the change in traffic density and demand intensity, which requires turning on/off a certain number of Remote Radio Heads (RRHs) that represent the Radio Frequency (RF) front end of the mobile network. For the purpose of providing a reliable and acceptable telecommunications service to users and financially useful to network operators by rationing energy consumption and meeting the required needs, dynamic 5G networks can do this by relying on a Dynamic Cloud Radio Access Network (DC-RAN) that enables them to respond to demand variables by shifting several types of coverage cells into a single serviced area and stopping them when needed.","PeriodicalId":184256,"journal":{"name":"Wasit Journal of Engineering Sciences","volume":" 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138612774","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

Equalization methods for Filter Bank Multicarrier OQAM 滤波器组多载波 OQAM 的均衡方法

Wasit Journal of Engineering Sciences Pub Date : 2023-12-01 DOI: 10.31185/ejuow.vol11.iss3.471

Oras F Kadhem, T. Jamel, H. Khazaal, .لألااتلا ىلً

{"title":"Equalization methods for Filter Bank Multicarrier OQAM","authors":"Oras F Kadhem, T. Jamel, H. Khazaal, .لألااتلا ىلً","doi":"10.31185/ejuow.vol11.iss3.471","DOIUrl":"https://doi.org/10.31185/ejuow.vol11.iss3.471","url":null,"abstract":"Filter bank multi-carrier offset-quadrature amplitude modulation (FBMC OQAM) is a hot topic in 5G multi-carrier research. In order to achieve high data rates and reliable wireless communication, receiver channel equalization is required. This is because of the equalizer's excellent spectral efficiency, exceptionally low side-lobe leakage, zero periodic cyclic prefixes (CP), and multiphase filter design. However, a number of degradations, including fading, Doppler shifts, and intermittent symbol interference (ISI), are added to the transmitted data symbols as they traverse the wireless channel, reducing the network's overall quality. To mitigate the negative effects of channel defects, many channel equalization algorithms have been developed for use in modern telecommunications networks. Six different equalizer approaches have been implemented. Using the Pedestrian A and Vehicular B channel in our simulations, we examine how well they function. The system was simulated using MATLAB's Communications Toolbox (an M file). Bit-error-rate (BER) and signal-to-noise ratio (SNR) were used to evaluate the outcomes. The Bit error rate was calculated by checking for differences between the sent and received bit sequences. The best value of the bit error ratio using frequency domain equalization and the time domain equalization 5.4 and 4.7 , respectively.","PeriodicalId":184256,"journal":{"name":"Wasit Journal of Engineering Sciences","volume":"103 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138623198","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

Comparing The Abrasion Resistance of Conventional Concrete and Green Concrete Samples 比较传统混凝土和绿色混凝土样品的耐磨性

Wasit Journal of Engineering Sciences Pub Date : 2023-12-01 DOI: 10.31185/ejuow.vol11.iss3.459

Mohammed Q. Abbas, Ali N. Hilo, T. S. Al-Gasham

{"title":"Comparing The Abrasion Resistance of Conventional Concrete and Green Concrete Samples","authors":"Mohammed Q. Abbas, Ali N. Hilo, T. S. Al-Gasham","doi":"10.31185/ejuow.vol11.iss3.459","DOIUrl":"https://doi.org/10.31185/ejuow.vol11.iss3.459","url":null,"abstract":"Significant volumes of non-biodegradable solid waste are related to industrial activity in Iraq, with waste plastic being one of the most notable. 24 samples were used in this study to test the effectiveness of recycling waste plastic to make concrete. Four different ratios of waste plastic from both green and conventional concrete were used as a partial replacement for gravel: 0%, 30%, 60%, and 100%. All of the concrete combinations were tested at room temperature. These tests include compressive strength and abrasion resistance. The compressive strength was determined by molding 36 cubes. In this study, concrete mixes were cured for 3, 7, and 28 days. The apparatus created in the Construction Laboratory of the Civil Engineering department at Wasit University was used to measure the rate of concrete erosion by directing a high-velocity jet of a water and sand combination at concrete samples. A determination was also made on the impact of the impingement angle. Using two distinct angles (45 and 90) with the horizon, experimental estimations were performed. The results of the experimental studies showed that the flow inclination angle of 45 with the horizon can achieve the highest rate of erosion, while the flow inclination angle of 90 with the horizon can achieve the lowest rate. Additionally, the results showed that erosion decreased as the plastic percentage increased with age. This study confirms that recycling waste plastic as a gravel substitute in concrete offers a promising solution to lower material costs and address some of the issues with solid waste that plastic presents.","PeriodicalId":184256,"journal":{"name":"Wasit Journal of Engineering Sciences","volume":"18 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138624431","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

CFD simulation of helical coil heat exchanger with Different coil pitch to heating heavy fuel oil 不同盘管间距螺旋盘管热交换器加热重油的 CFD 仿真

Wasit Journal of Engineering Sciences Pub Date : 2023-12-01 DOI: 10.31185/ejuow.vol11.iss3.472

Safaa A. Saleh, Z. K. Kadhim, K. Khalaf

{"title":"CFD simulation of helical coil heat exchanger with Different coil pitch to heating heavy fuel oil","authors":"Safaa A. Saleh, Z. K. Kadhim, K. Khalaf","doi":"10.31185/ejuow.vol11.iss3.472","DOIUrl":"https://doi.org/10.31185/ejuow.vol11.iss3.472","url":null,"abstract":"In current work, CFD simulation of \"shell and helical coil heat exchanger\" has been done using ANSYS FLUENT package 19.2. Numerical study involved design of helical tube with different curvature ratio (di/Dc) 0.166, 0.153, and 0.142 and different coil pitch (30, 50, 75, and 100) mm has been chosen to study the effect of curvature ratio and coil pitch. In shell side cold fluid (oil) \"flow rate\" is varying from (0.06 - 0.1) kg/s and hot fluid (air) velocity ranges are from (20 to 48) m/s in helical tube with inlet temperature (200, 225, 250) °C. It has been found out that increasing \"oil mass flow rate\" from (0.06-0.1) kg/s cause decreasing \"oil outlet temperature\" about 3% and increasing \"heat transfer rate\", with percentage 37%. From numerical results the curvature ratio 0.142 gives higher heat transfer rate and oil outlet temperature while higher Dean number and Nusselt number in coil with curvature ratio 0.166. Also, results show increases of coil pitch led to increasing in overall heat transfer coefficient and Nusselt number of the shell side. while, heat transfer, oil outlet temperature effectiveness and pressure drop, decreases along the coil with increasing coil pitch.","PeriodicalId":184256,"journal":{"name":"Wasit Journal of Engineering Sciences","volume":"117 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138621755","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 Study of Flow Regimes of Stepped Weir 阶梯堰流态实验研究

Wasit Journal of Engineering Sciences Pub Date : 2023-08-09 DOI: 10.31185/ejuow.vol11.iss2.438

Samaa Hussein, M. Shamkhi

引用次数: 0

An experimental study of noise reduction of portable generator using local made acoustic enclosure 利用本地制造的隔音罩降低便携式发电机噪音的实验研究

Wasit Journal of Engineering Sciences Pub Date : 2023-08-09 DOI: 10.31185/ejuow.vol11.iss2.441

1dalal9 Kareem, Abbas J. Jubear, Hussain R. Al-Bugharbee

{"title":"An experimental study of noise reduction of portable generator using local made acoustic enclosure","authors":"1dalal9 Kareem, Abbas J. Jubear, Hussain R. Al-Bugharbee","doi":"10.31185/ejuow.vol11.iss2.441","DOIUrl":"https://doi.org/10.31185/ejuow.vol11.iss2.441","url":null,"abstract":"Portable generators are now widely used in shops, offices, and homes to provide electrical power during power outages in Iraq. However, these generators produce a lot of noise emitted from rotating mechanical parts and fuel combustion inside engine chamber. This noise has a negative impact on the neuroendocrine, cardiovascular, respiratory, and digestive systems. The reduction of generator noise still attracts the interest of many researchers. In this work, the reduction of generator noise under the use of an acoustic enclosure, made from local materials, is investigated experimentally. Experimental work is conducted using a 2kW generator and compares the sound intensity for two cases: a generator without enclosure and one with enclosure. The enclosure is made from plywood, galvanized sheet, glass wool, cork, and a compressed sponge. The results include the measurement of sound intensity at day and night, at zero to full load, and at two different distances. The findings depicted that generator noise reduction reaches 10.3 dB at night and 9.6 dB during the day. In addition, the engine temperature, in case of using the enclosure, is kept within the allowable range of air-cooled generators which is 300 °C. The maximum temperature at 100% load measured inside the enclosure was 77.86 °C during the night time and 91.75 °C at day time.","PeriodicalId":184256,"journal":{"name":"Wasit Journal of Engineering Sciences","volume":"56 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139351283","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

Eye Movement Tracking Using Opencv Python 使用 Opencv Python 进行眼动跟踪

Wasit Journal of Engineering Sciences Pub Date : 2023-08-09 DOI: 10.31185/ejuow.vol11.iss2.393

Mohammed Satar, Basim Alshammari, H. Jasim

{"title":"Eye Movement Tracking Using Opencv Python","authors":"Mohammed Satar, Basim Alshammari, H. Jasim","doi":"10.31185/ejuow.vol11.iss2.393","DOIUrl":"https://doi.org/10.31185/ejuow.vol11.iss2.393","url":null,"abstract":"In this study, we made a simple, low-cost algorithm for tracking eye movements and eye blinks in real-time and non-real-time. Several methods are being used right now. Show parts of the face, like the eyes or the whole face. For this reason, open-source libraries like OpenCV enable high-level programming to implement reliable and accurate detection algorithms like Haar Cascade. Since everything is processed in real-time, payment must be made quickly. Pay attention to how hardware, like a computer, can only use a certain amount of resources (processing power). The system has been proven to work by tests with 15 people of different ages and backgrounds. These tests are done to see how the user and the device work together and ensure everything works correctly. The In the tests done, the system worked between 80% and 100% of the time. The results showed that Haar Cascade had a significant effect by Detection of faces in 100% of cases, while the eyes and pupil where they overlap (light and shade) is less effective. In addition to looking at how well the Through these activities, the demo application also showed that user restrictions shouldn't stop people from enjoying and using a certain type of technology. The program was written in C++, and the OpenCV library makes it work on Windows. This system has many uses in the real world and science. By looking at the data from this algorithm from afar, for example, it can tell if someone has an eye disease or is tired. It can also help people who have physical or mental problems","PeriodicalId":184256,"journal":{"name":"Wasit Journal of Engineering Sciences","volume":"57 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139351223","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

Hybridisation of artificial neural network with particle swarm optimisation for water level prediction 人工神经网络与粒子群优化技术在水位预测中的混合应用

Wasit Journal of Engineering Sciences Pub Date : 2023-08-09 DOI: 10.31185/ejuow.vol11.iss2.404

Sarah J. Mohammed, S. Zubaidi

引用次数: 0