i-manager's Journal on Mechanical Engineering最新文献_第3页

Computational study on the thermal properties of a closed loop pulsating heat pipe 闭环脉动热管热特性的计算研究

i-manager's Journal on Mechanical Engineering Pub Date : 1900-01-01 DOI: 10.26634/jme.13.3.19312

Sai Raja Chada Jithendra, Ram Deepak Akella Sri

{"title":"Computational study on the thermal properties of a closed loop pulsating heat pipe","authors":"Sai Raja Chada Jithendra, Ram Deepak Akella Sri","doi":"10.26634/jme.13.3.19312","DOIUrl":"https://doi.org/10.26634/jme.13.3.19312","url":null,"abstract":"Pulsating Heat Pipes (PHPs) are passive heat transfer devices, where heat transfer is higher than that in common heat transfer devices such as metal fins and heat pipes. The main reason for this is the two-phase phenomenon occurring inside the PHPs with oscillatory motion of the bubbles. The flow in the pipe is a multiphase flow, where vapor plugs and liquid slugs are created in PHPs due to capillary action. In this study, a CFD analysis was conducted on a two-turn PHP using the Analysis of Systems (ANSYS) Fluent software. The adiabatic section and overall height of the pipe were kept constant, whereas the height of the evaporation region varied at 32, 37, 42, 47, and 52 mm from the bottom. This study aims to investigate the performance of PHP and how heat transfer is affected. It also observed variations in the volume fraction and thermal resistance, considering other factors. The study was conducted under previously researched conditions with an inner diameter of 2.0 mm and an outer diameter of 3.0 mm. The PHP was made of copper, and the working fluid was methanol, which filled 50% of the volume. Heat inputs of 80 W, 85 W, 90 W, and 95 watts were supplied to the PHP. The simulation was performed, and the output results are presented in graphical and contour plots.","PeriodicalId":191914,"journal":{"name":"i-manager's Journal on Mechanical Engineering","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115844407","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

PREPARATION, MICROSTRUCTURE EVALUATION, AND PERFORMANCE ANALYSIS OF DIAMOND-IRON BONDED MAGNETIC ABRASIVES 金刚石-铁结合磁性磨料的制备、微观结构评价及性能分析

i-manager's Journal on Mechanical Engineering Pub Date : 1900-01-01 DOI: 10.26634/jme.9.4.16403

Singh Palwinder, Singh Lakhvir, Singh Sehijpal

引用次数: 0

OPTIMIZATION AND ENERGY PERFORMANCE OF 400MW STEAM POWER PLANT BASED ON MINI REFPROP SOFTWARE PACKAGES 基于小型refprop软件包的400mw蒸汽电厂优化及节能研究

i-manager's Journal on Mechanical Engineering Pub Date : 1900-01-01 DOI: 10.26634/jme.11.4.18078

F. E. Malik, M. M. Abdulhafed, S. Saji, A. Mohamed

引用次数: 0

A comparative study of hybrid bit over roller cone and PDC bits 混合钻头与牙轮和PDC钻头的对比研究

i-manager's Journal on Mechanical Engineering Pub Date : 1900-01-01 DOI: 10.26634/jme.13.2.19018

Sharma Pranshu

{"title":"A comparative study of hybrid bit over roller cone and PDC bits","authors":"Sharma Pranshu","doi":"10.26634/jme.13.2.19018","DOIUrl":"https://doi.org/10.26634/jme.13.2.19018","url":null,"abstract":"Early hybrid drilling concepts date back to the 1930s, but the development of a viable drilling tool has only become feasible with recent advances in Polycrystalline Diamond Compact (PDC) cutter technology. This paper describes a new generation of hybrid bits based on proven PDC bit designs with roll cutters on the bit periphery. Laboratory and field results will be presented, comparing the performance of hybrid bits with that of conventional PDC and roller bits. A hybrid bit can drill shale and other plastically behaving formations two to four times faster than a roller cone because it is more aggressive and efficient. The penetration rate of a hybrid bit responds linearly to Revolutions Per Minute (RPM), unlike roller taper bits that exhibit an exponential response with an exponent less than one. In other words, a hybrid drill will drill significantly faster than a comparable roller drill in motor applications. Another advantage is the influence of rolling mills on bit dynamics. Compared to conventional PDC bits, torsional oscillations are up to 50% lower, and low-speed slip/slip and high-speed swirl are reduced. This gives the hybrid drill a wider operating window and greatly improves tool face control in directional drilling. The Hybrid Drill is a highly specific drill aimed at traditional cylindrical taper applications limited by the Rate of Penetration (ROP), large-diameter PDC-bit and roller-cone-bit applications limited by torque or Weight on Bit (WOB). Highly interconnected formations with high torque fluctuations can cause premature C3 failure and limit mean operating value torque, and motor and/or P applications where higher ROP and better build speed and tool face control are desired.","PeriodicalId":191914,"journal":{"name":"i-manager's Journal on Mechanical Engineering","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122388964","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

Investigating performance of compound heating furnace subject to heating by two elements, high alumina insulation and silicon control rectifier (scr) system at 1600ᴼc 研究了高铝绝缘和可控硅(scr)系统在1600℃ᴼ温度下加热复合加热炉的性能

i-manager's Journal on Mechanical Engineering Pub Date : 1900-01-01 DOI: 10.26634/jme.12.4.18560

K. C. Ranjib, M. S. Krupashankara

{"title":"Investigating performance of compound heating furnace subject to heating by two elements, high alumina insulation and silicon control rectifier (scr) system at 1600ᴼc","authors":"K. C. Ranjib, M. S. Krupashankara","doi":"10.26634/jme.12.4.18560","DOIUrl":"https://doi.org/10.26634/jme.12.4.18560","url":null,"abstract":"The present study examines the performance of a resistance heating furnace using two different heating elements, Silicon Carbide (SiC) heating rods and Molybdenum Di-Silicide (MoSi2) heating elements, where SiC rods are used first, starting from the beginning (ambience) temperature of 35ᴼC up to 1300ᴼC, followed by MoSi2 heating elements to raise the chamber temperature from 1300ᴼC to the set temperature of 1600ᴼC. To achieve effective insulation results, newage high alumina (Al2O3), very low thermal conductivity (K), and high density materials such as zirconium tiles, mullite tiles, and zirconium modules, all with such necessary insulation properties sandwiched, are used. Air, a bad conductor of heat transfer, is also used in a gap of 20 mm between two different tiles to lessen heat transfer from the working chamber towards the outer ambience by conduction and radiation to achieve desirable results-maximum thermal efficiency with the least heat loss from the outer surface and to achieve skin temperature equal to the ambient temperature. Also, in this experiment, hot-faced red bricks are used under the hearth in a new design. The system under study consists of a programmable Proportional Integral Derivative (PID), a thyristor power pack, recrystallized alumina tubes, and sensing elements: a thermocouple and Pt-Pt/13%. Rh, semiconductor-based circuit that controls power and current. This makes the system to meet the requirement (step down) and thereby controls voltage automatically with a transformer (depending on the size of the working area, 53 A (I), 220 V for single phase, reduced to 60 V by a step down transformer) auto-current-limiting facilities.","PeriodicalId":191914,"journal":{"name":"i-manager's Journal on Mechanical Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125855986","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

Mathematical modeling of thermal enhanced oil recovery method 热采油方法的数学建模

i-manager's Journal on Mechanical Engineering Pub Date : 1900-01-01 DOI: 10.26634/jme.13.1.19019

Srajan Vajpayee, Tanmay Rawat, Vandan Bhalala

引用次数: 0

Optimization of Tool wear and Surface Roughness in Turning Titanium (Ti-6Al-4V) Alloy; NFMQCF Technique 车削钛合金刀具磨损和表面粗糙度优化研究NFMQCF技术

i-manager's Journal on Mechanical Engineering Pub Date : 1900-01-01 DOI: 10.26634/JME.9.2.14812

Katta Sivakoteswararao, G. Chaitanya, Shankar B. Ravi

引用次数: 1

NUMERICAL SIMULATION AND EXPERIMENTAL STUDY OF GLASS FIBER EPOXY DRIVE SHAFT 玻璃纤维环氧树脂传动轴的数值模拟与实验研究

i-manager's Journal on Mechanical Engineering Pub Date : 1900-01-01 DOI: 10.26634/jme.11.4.18109

R. Srinivasan, R. Ramkumar

引用次数: 0

PVT panel efficiency enhancement with cooling methods and sun tracking PVT面板效率提高与冷却方法和太阳跟踪

i-manager's Journal on Mechanical Engineering Pub Date : 1900-01-01 DOI: 10.26634/jme.13.3.19759

Rao D. Kameswara, Reddy K. Sudhakar, Rao V. V. Subba, K. Ankamma

{"title":"PVT panel efficiency enhancement with cooling methods and sun tracking","authors":"Rao D. Kameswara, Reddy K. Sudhakar, Rao V. V. Subba, K. Ankamma","doi":"10.26634/jme.13.3.19759","DOIUrl":"https://doi.org/10.26634/jme.13.3.19759","url":null,"abstract":"Solar energy is the most abundant and easily available renewable source of electricity. However, the installed solar panels may not always provide the optimal amount of energy because of the changing position of the sun from east to west. This study focused on extending the research and development of a model for a dual-axis solar panel tracking system with a cooling mechanism. The primary objective of this mechanism is to program the Arduino board in a way that ensures continuous alignment of the panel direction and Light-Dependent Resistor (LDR) sensors with the sun's rays. Direct Current (DC) motors were employed to adjust the panel direction accordingly. Sustained exposure to sunlight can lead to reduced efficiency when the panel is heated. To counteract overheating, an improved cooling system was implemented utilizing water and a pump arrangement to enhance the productivity of the panel. Water is sprayed or sprinkled using various Pulse Code Modulation (PCM) techniques, effectively maintaining the solar panel temperature at an optimal level. This mechanism can be enhanced by integrating a Real-Time Clock (RTC) to accurately track the direction of the sun. This ensures that the panel remains properly positioned even in the event of a power outage, enabling the utilization of solar energy for electrical purposes. This research focuses on developing an efficient solar panel tracking system with a cooling mechanism to maximize the energy output and address temperature-related efficiency issues. The integration of advanced features such as RTC further enhances the reliability and usability of the system.","PeriodicalId":191914,"journal":{"name":"i-manager's Journal on Mechanical Engineering","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125575786","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

THERMAL PERFORMANCE ANALYSES OF CONCENTRIC PIPE COUNTER FLOW HEAT EXCHANGER AT DIFFERENT OPERATING CONDITIONS BY CFD 用CFD分析了不同工况下同心管逆流式换热器的热性能

i-manager's Journal on Mechanical Engineering Pub Date : 1900-01-01 DOI: 10.26634/JME.9.1.14805

P. Rajendra, Geete Ankur

引用次数: 3