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The Effects Of Physical Parameters On A Numerical Thermal Analysis Of A Transformer
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Book Synopsis The Effects of Physical Parameters on a Numerical Thermal Analysis of a Transformer by : Sherita Therese Brown
Download or read book The Effects of Physical Parameters on a Numerical Thermal Analysis of a Transformer written by Sherita Therese Brown and published by . This book was released on 1984 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Masters Theses in the Pure and Applied Sciences by : Wade H. Shafer
Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer. This book was released on 1986-07-01 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) * at Purdue University in 1 957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all con cerned if the printing and distribution of the volumes were handled by an interna tional publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Cor poration of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 29 (thesis year 1984) a total of 12,637 theses titles from 23 Canadian and 202 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this important annual reference work. While Volume 29 reports theses submitted in 1984, on occasion, certain univer sities do report theses submitted in previous years but not reported at the time.
Book Synopsis Using a Dynamic Thermal Model Approach to Estimate Loss of Life of Mineral Oil-immersed Transformers by : Tolou Askari Sedehi Mohammad
Download or read book Using a Dynamic Thermal Model Approach to Estimate Loss of Life of Mineral Oil-immersed Transformers written by Tolou Askari Sedehi Mohammad and published by . This book was released on 2010 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transformers are among the most important equipment in electrical power systems, where their operations play the main roles in providing the reliable power systems. Because of the high cost of transformers and their permanent connections to the transmission and distribution systems, reliable measures are needed to extend the life span. Insulation life of the transformer and loading capabilities depend on several parameters, among which cooling mode, ambient temperature, oil viscosity are critical. Hot spot temperature is a major factor on the insulation life of the transformer. To predict the hot spot temperature and top oil temperature, many principal models have been proposed such as the classic thermal model, and thermal-electrical models. This research attempts to determine an accurate hot spot temperature, hence evaluate the loss of life of the transformer according to the numerical analysis method. Top oil temperature and hot spot temperature were determined by an accurate thermal model which takes into account the dynamic parameters such as ambient temperature, oil viscosity, winding losses, and loading profile. IEEE standards and thermal-electrical model, which are regarded as the two acceptable and reliable thermal models, have been used as underlying principles of this research. Both linear and non-linear regressions have been used for solving these thermal models. The Runge-Kutta numerical method is proposed in this study for solving the thermal model and for carrying out the work on different types of the transformer based on the data that have been collected from heat run tests, loading profile and electrical and physical characteristics of each transformer. An alternative solution for solving the thermal model is proposed in this study. Results are compared with the actual temperature and hot spot temperature in the IEEE standards. Since data has been collected from different types of electrical transformers, this thesis proposes a model which is based on the previous researches that are carried out on 187 MVA, 2.5 MVA, 30 MVA and 250 MVA transformers. The prediction of top oil temperature and hot spot temperature is very important for estimating the loss of life of the transformer in the system. Therefore, such an accurate technique is needed for solving the thermal models. The findings reveal that the uses of numerical methods are in good agreement with the measured values when comparing with the traditional methods. In addition, based on the theoretical definition and results obtained, the proposed fourth order Runge-Kutta has given reasonably good accuracy among other numerical methods such as the second order Runge-Kutta and Euler methods. This has led to an improvement in calculating the top oil temperature and hot spot temperature, as well as in predicting the loss of life of the transformer.
Book Synopsis 2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE) by : IEEE Staff
Download or read book 2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE) written by IEEE Staff and published by . This book was released on 2020-09-06 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: International Conference on High Voltage Engineering DEIS has technically co sponsored this conference since its inception in 2008 Now, ICHVE is a fully sponsored DEIS event held every 2 years, once in China and once elsewhere in the world The demands for a large amount of electrical energy are resulting in new strategies for developing high voltage power systems, transmission lines, substations, and appropriate equipment In many countries, the new energy strategies require the planning and construction of UHV ac and dc transmission systems ICHVE provides an excellent opportunity for high voltage engineering scientists, researchers, faculty, industrial representatives and students to share their state of art research on topics such as electromagnetic fields transients, grounding, and EMC sensing, monitoring and diagnostics high voltage testing and measurement aging, space charge, and maintenance materials and insulation systems HVDC technologies industrial applications
Book Synopsis Thermal, Power and Electrical Engineering by : Charles C. Zhou
Download or read book Thermal, Power and Electrical Engineering written by Charles C. Zhou and published by Trans Tech Publications Ltd. This book was released on 2013-08-16 with total page 1510 pages. Available in PDF, EPUB and Kindle. Book excerpt: Selected, peer reviewed papers from the 2013 2nd International Conference on Energy and Environmental Protection (ICEEP 2013), April 19-21, 2013, Guilin, China
Book Synopsis Analysis of Industrial Transformers Cooled by Natural Convection by : Luis Alfredo Payán Rodríguez
Download or read book Analysis of Industrial Transformers Cooled by Natural Convection written by Luis Alfredo Payán Rodríguez and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "This thesis presents a fundamental study about the heat transfer in industrial transformers. The work is divided into two stages: the first one consists of two experimental works developed with the aim of characterizing the cooling phenomenon called thermosyphon which is commonly encountered in oil-cooled transformers. In the second stage was developed a physical-mathematical model whose objective was to estimate in a systematic way the winding temperature gradient in high voltage transformers. One of the works that were developed in the first stage of this project consisted of a laboratory-scale research where was developed an apparatus to reproduce the thermosyphon effect under controlled conditions. The results obtained here were useful to identify the effect of the thermal and geometric variables considered in the experiment, on the heat transfer coefficient of the apparatus. This experimental exercise was useful to put into practice the techniques of experimentation and data analysis which later would be used in the second work of the first stage of this thesis. The second work of the first stage was the development of a prototype of industrial transformer which was used to obtain experimental information on the influence of thermal and geometrical variations on the heat transfer coefficient. From this information was developed a correlation to estimate the heat transfer coefhcient which was later integrated into a general procedure for estimating the winding temperature gradient of industrial transformers. The second stage of this thesis presents the development of a physical-mathematical model whose goal was the estimation of the winding temperature gradient in substation transformers. Here it is proposed a methodology for calculating the gradient based on the determination of the distribution of the flow of dielectric oil in the main regions of the transformer and on the formulation of a thermal circuit of the windings. There was a first stage of validation of the results of the model by comparing them against data from tests of temperature obtained from transformers of different nominal capacities. The results of the comparison showed that the model developed in this research offers a good picture of the winding temperature gradient. Because, in addition to showing a comparable performance and in several cases better than the current method of calculation, allows to evaluate the influence of a greater number of design variables than those used currently."--Resumen.
Download or read book Journal of Heat Transfer written by and published by . This book was released on 2001 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Book Synopsis Heat Transfer 1986 by : Chang L. Tien
Download or read book Heat Transfer 1986 written by Chang L. Tien and published by CRC Press. This book was released on 1986-09-01 with total page 720 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Towards Nanofluids for Large-Scale Industrial Applications by : Bharat A. Bhanvase
Download or read book Towards Nanofluids for Large-Scale Industrial Applications written by Bharat A. Bhanvase and published by Elsevier. This book was released on 2024-05-14 with total page 479 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanofluids for Large-Scale Industrial Applications examines the challenges and current progress towards large-scale industrial application of nanofluids, summarizing and bringing together varied current research strands and providing potential solutions pertaining to the scientific, economic, and social barriers that currently exist. Opening with an introduction to nanofluid synthesis, types, and properties, this book traverses the potential large-scale applications and commercialisation of nanofluids in industrial heating/cooling, solar energy systems, refrigeration systems, automotive systems, and various chemical processes and manufacturing systems. This book provides knowledge of a vast area of applications of nanofluids in industries. Thus, it also has potential to encourage and trigger the minds of researchers to discover more about nanofluids, investigate the gaps, overcome the challenges, and provide future directions for newer applications and develop nanofluids further. The book is written chiefly for graduate/postdoc level students and researchers/academics teaching or studying in chemical and thermal engineering and who are focused on heat transfer enhancement, thermal energy, nanofluids, and nano-enhanced energy systems such as solar thermal systems. Examines the challenges and current progress towards implementing large-scale industrial application of nanofluids Addresses current gaps in research, explores challenges and controversies as well as weaknesses and strengths versus alternative solutions Aims to bridge the gap between fundamental research and potential industrial-scale utilization in the future by providing pathways towards convenient and sustainable scale-up Meets a need to compile all current information and knowledge from studies and research related to large-scale nanofluids applications in one single resource
Download or read book Technical Translations written by and published by . This book was released on 1960 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1990 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ERDA Energy Research Abstracts written by and published by . This book was released on 1983 with total page 1048 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1988 with total page 1132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1975 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electrical Engineer's Reference Book by : G R Jones
Download or read book Electrical Engineer's Reference Book written by G R Jones and published by Elsevier. This book was released on 2013-10-22 with total page 1392 pages. Available in PDF, EPUB and Kindle. Book excerpt: A long established reference book: radical revision for the fifteenth edition includes complete rearrangement to take in chapters on new topics and regroup the subjects covered for easy access to information.The Electrical Engineer's Reference Book, first published in 1945, maintains its original aims: to reflect the state of the art in electrical science and technology and cater for the needs of practising engineers. Most chapters have been revised and many augmented so as to deal properly with both fundamental developments and new technology and applications that have come to the fore since the fourteenth edition was published (1985). Topics covered by new chapters or radically updated sections include: * digital and programmable electronic systems * reliability analysis * EMC * power electronics * fundamental properties of materials * optical fibres * maintenance in power systems * electroheat and welding * agriculture and horticulture * aeronautic transportation * health and safety * procurement and purchasing * engineering economics
Book Synopsis Publications of the National Institute of Standards and Technology ... Catalog by : National Institute of Standards and Technology (U.S.)
Download or read book Publications of the National Institute of Standards and Technology ... Catalog written by National Institute of Standards and Technology (U.S.) and published by . This book was released on 1987 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt:
