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Author: Nimesh Parmar Publisher: LAP Lambert Academic Publishing ISBN: 9783659243660 Category : Science Languages : en Pages : 0
Book Description
This work is usefull for the the branch of physics and Engineering that involves the study of producing temperatures in the range from practically zero to, say, 125 K and of material behavior at these temperatures. A cryocooler is a refrigeration machine that reaches temperatures below, say, 125 K with a small refrigeration capacity. The objectives of the present work describe the analysis, design and an experimental working model of two stage pulse tube refrigerator. By using the Experiment set-up, cooling Behavior of the refrigeration system and refrigeration power has been investigated. Test a Two stage pulse tube refrigerator in the cryogenics lab of Mechanical Engineering Department of L.D.College of engineering, Ahmedabad. This book can use for initiation design and experiment with pulse tube refrigerator.
Author: Nimesh Parmar Publisher: LAP Lambert Academic Publishing ISBN: 9783659243660 Category : Science Languages : en Pages : 0
Book Description
This work is usefull for the the branch of physics and Engineering that involves the study of producing temperatures in the range from practically zero to, say, 125 K and of material behavior at these temperatures. A cryocooler is a refrigeration machine that reaches temperatures below, say, 125 K with a small refrigeration capacity. The objectives of the present work describe the analysis, design and an experimental working model of two stage pulse tube refrigerator. By using the Experiment set-up, cooling Behavior of the refrigeration system and refrigeration power has been investigated. Test a Two stage pulse tube refrigerator in the cryogenics lab of Mechanical Engineering Department of L.D.College of engineering, Ahmedabad. This book can use for initiation design and experiment with pulse tube refrigerator.
Author: Ronald G. Jr. Ross Publisher: Springer Science & Business Media ISBN: 0306471124 Category : Science Languages : en Pages : 797
Book Description
Composed of papers written by leading engineers and scientists in the field, this valuable collection reports the most recent advances in cryocooler development, contains extensive performance test results and comparisons, and relates the latest experience in integrating cryocoolers into advanced applications.
Author: K.D. Timmerhaus Publisher: Springer Science & Business Media ISBN: 1461322138 Category : Science Languages : en Pages : 1312
Book Description
The 1985 joint Cryogenic Engineering/International Cryogenic Materi als Conference was held on the campus of the Massachusetts Institute of Technology, Cambridge, Massachusetts. About 350 papers were presented at the joint conference on a wide variety of topics in cryogenic science and engineering. This volume of Advances in cryogenic Eogineerlng, the thirty-first in the series which began in 1954, contains most of the papers which were presented at the 1985 Cryogenic Engineering Conference. Each paper was rigorously peer reviewed to maintain the international reputation of Advances as the premier archival publication in the field of cryoscience, engineering, and technology. All the papers published in Volume 31 contain an abstract. A copy of the book will be sent to all maj or abstracting services, which should improve retrieval of the information contained in the published papers. I would like to thank the authors and those who served as reviewers. I especially appreciate the assistance of my colleague M. E. Stone who edited some of the papers for this volume. Terry Gutierrez was invaluable in preparing the manuscripts for publication, and I thank her. xvii DEDICATION Dr. Samuel C. Collins, Professor Emeritus of the Massachusetts Institute of Technology, internationally known as the father of practical helium liquefiers and founder of the MIT Cryogenic Engineering Laboratory, died on June 19, 1984, in George Washington University Hospital, Washington, DC.
Author: Ronald G. Ross Publisher: Springer Science & Business Media ISBN: 0387275339 Category : Science Languages : en Pages : 710
Book Description
The last two years have witnessed a continuation in the breakthrough shift toward pulse tube cryocoolers for long-life, high-reliability cryocooler applications. New this year are papers de scribing the development of very large pulse tube cryocoolers to provide up to 1500 watts of cooling for industrial applications such as cooling the superconducting magnets of Mag-lev trains, coolmg superconducting cables for the power mdustry, and liquefymg natural gas. Pulse tube coolers can be driven by several competing compressor technologies. One class of pulse tube coolers is referred to as "Stirling type" because they are based on the linear Oxford Stirling-cooler type compressor; these generally provide coolmg m the 30 to 100 K temperature range and operate ^t frequencies from 30 to 60 Hz. A second type of pulse tube cooler is the so-called "Gifford-McMahon type. " Pulse tube coolers of this type use a G-M type compressor and lower frequency operation (~1 Hz) to achieve temperatures in the 2 to 10 K temperature range. The third type of pulse tube cooler is driven by a thermoacoustic oscillator, a heat engine that functions well in remote environments where electricity is not readily available. All three types are described, and in total, nearly half of this proceedings covers new developments in the pulse tube arena. Complementing the work on low-temperature pulse tube and Gifford-McMahon cryocoolers is substantial continued progress on rare earth regenerator materials.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
The working fluid for the pulse tube refrigerator is Helium, which is non-toxic to humans and harmless to the environment. The Pulse Tube Refrigeration unit offers a viable alternative to units that currently require CFC and HCFC working fluids. Pulse Tube Refrigerators can be operated over wide range of temperatures. These units can be used in numerous space and commercial applications, including food freezers freeze dryers. It can also be used to cool detectors and electronic devices. The design of Pulse Tube Refrigeration Unit was based on Orifice Pulse Tube Concept. First the gas is compressed in a compressor. Next it floes through the compressor after cooler, where heat is rejected to the water cooled loop. Then the gas enters the regenerator and cold end heat exchanger where heat is added to the gas from surroundings. The gas finally enters the Pulse Tube, orifice and reservoir. These three components produce the phase shift of mass flow and pressure, which is necessary for cooling. The gas shuttles forth between hot and cold ends. Heat is lifted against the temperature gradient and rejected at hot end heat exchanger, which is water cooled.
Author: Peter J. Storch Publisher: Forgotten Books ISBN: 9781391652511 Category : Science Languages : en Pages : 106
Book Description
Excerpt from Analytical Model for the Refrigeration Power of the Orifice Pulse Tube Refrigerator The general goal of this study is to gain a better understanding of the refrigeration mechanism and the capability of the ptr. More Specifically, this work is concerned with developing an analytical model for the refrigeration power generated in an orifice pulse tube refrigerator (cftr). With the aid of several simplifying assumptions, we derive equations which identify the important parameters in the system. Once the analytical expressions are devised, verification of the model is accomplished by comparing results to previous experimental studies as well as to experiments completed in this work. A simple, analytical model of the cooling power is useful for three reasons. First, such a model provides insight into the refrigeration mechanism. Often when a numerical model is used to rigorously describe a system, it is difficult to see the physics involved in the process. With an analytical expression, important parameters that affect performance are more easily recognized. Second, basic trends or dependencies of performance can be determined. Such dependencies will aid in optimization and indicate the range of parameters which should be studied in more detail either numerically or experimentally. Third, a simple analytical model will be useful for design. Although not as accurate as a numerical analysis, the model will be convenient for making approximate predictions of system size and refrigeration capacity of the ptr. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: Gregory W. Swift Publisher: Springer ISBN: 3319669338 Category : Science Languages : en Pages : 340
Book Description
This updated new edition provides an introduction to the field of thermoacoustics. All of the key aspects of the topic are introduced, with the goal of helping the reader to acquire both an intuitive understanding and the ability to design hardware, build it, and assess its performance. Weaving together intuition, mathematics, and experimental results, this text equips readers with the tools to bridge the fields of thermodynamics and acoustics. At the same time, it remains firmly grounded in experimental results, basing its discussions on the distillation of a body of experiments spanning several decades and countries. The book begins with detailed treatment of the fundamental physical laws that underlie thermoacoustics. It then goes on to discuss key concepts, including simple oscillations, waves, power, and efficiency. The remaining portions of the book delve into more advanced topics and address practical concerns in applications chapters on hardware and measurements. With its careful progression and end-of-chapter exercises, this book will appeal to graduate students in physics and engineering as well as researchers and practitioners in either acoustics or thermodynamics looking to explore the possibilities of thermoacoustics. This revised and expanded second edition has been updated with an eye to modern technology, including computer animations and DeltaEC examples.
Author: Nimesh Parmar
Author: Nimesh Parmar
Author: Jinglei Shi
Author: Jong Hoon Baik
Author: Ronald G. Jr. Ross
Author: K.D. Timmerhaus
Author: 
Author: Ronald G. Ross
Author: 
Author: Peter J. Storch
Author: Gregory W. Swift