By Steven W. Van Sciver (auth.)
ISBN-10: 1441999787
ISBN-13: 9781441999788
Twenty 5 years have elapsed because the unique booklet of Helium Cryogenics. in this time, a large amount of examine and improvement concerning helium fluids has been conducted culminating in numerous large-scale tasks. additionally, the sphere has matured via those efforts in order that there's now a wide engineering base to aid the advance of destiny projects.
Helium Cryogenics, second edition brings those advances in helium cryogenics jointly in an up to date shape. As within the unique version, the author's strategy is to survey the sphere of cryogenics with emphasis on helium fluids. This method is extra really expert and basic than that contained in different cryogenics books, which deal with the linked diversity of cryogenic fluids. therefore, the extent of remedy is extra complicated and assumes a definite wisdom of primary engineering and physics rules, together with a few quantum mechanics.
The target in the course of the paintings is to bridge the distance among the physics and engineering facets of helium fluids to supply a resource for engineers and scientists to augment their usefulness in low-temperature systems.
Dr. Van Sciver is a amazing learn Professor and John H. Gorrie Professor of Mechanical Engineering at Florida nation collage. he's additionally a software Director on the nationwide excessive Magnetic box Laboratory (NHMFL). Dr. Van Sciver joined the FAMU-FSU collage of Engineering and the NHMFL in 1991, beginning and instructing a graduate application in magnet and fabrics engineering and in cryogenic thermal sciences and warmth move. He additionally led the NHMFL improvement efforts of the cryogenic platforms for the NHMFL Hybrid and 900 MHz NMR superconducting magnets. among 1997 and 2003, he served as Director of Magnet technological know-how and expertise on the NHMFL. Dr. Van Sciver is a Fellow of the ASME and the Cryogenic Society of the US and American Editor for the magazine Cryogenics. he's the 2010 recipient of the Kurt Mendelssohn Award.
Prior to becoming a member of Florida kingdom college, Dr. Van Sciver used to be learn Scientist after which Professor of Nuclear Engineering, Engineering Physics and Mechanical Engineering on the collage of Wisconsin-Madison from 1976 to 1991. in the course of that point he additionally served because the affiliate Director of the utilized Superconductivity middle. Dr. Van Sciver bought his PhD in Low Temperature Physics from the college of Washington-Seattle in 1976. He obtained his BS measure in Engineering Physics from Lehigh college in 1970.
Dr. Van Sciver is writer of over 2 hundred courses and patents in low temperature physics, liquid helium know-how, cryogenic engineering and magnet expertise. the 1st variation of Helium Cryogenics was once released by way of Plenum Press (1986). the current paintings is an replace and growth of that unique venture.
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Additional info for Helium Cryogenics
Sample text
It represents the amount of energy needed to raise the temperature of a known quantity of a material one degree. The heat capacity per unit mass is called the specific heat. In cryogenic systems, the heat capacity of a material is integral to numerous calculations including: the dynamics of cooling devices from superconducting magnets to sensors, thermal energy storage, dynamic thermal loading on refrigeration systems, and transient heat transfer. As with many physical properties, the heat capacity is defined in terms of other thermodynamic state variables.
8 shows plots of the thermal conductivities of copper analogous to Fig. 6 for the electrical resistivity. The limiting behavior near room temperature gives a near constant value k ΒΌ 401 W/m K. With decreasing temperature, the thermal conductivity rises through a maximum that depends on the purity of the sample followed by a linear region (k ~ T) at the lowest temperatures. This system is entirely consistent with the simplified theoretical picture. Since the electronic thermal and electrical conductivities in pure metals have similar scattering processes, a correspondence clearly should exist between these 36 2 Low-Temperature Materials Properties Fig.
In a procedure known as cryosurgery, selected areas of tissue are frozen and removed with less difficulty or trauma to the patient than by conventional surgical methods. Such techniques are commonly experienced by almost anyone who has visited a dermatologist. The basic properties of materials change as the temperature is reduced and these effects are used in several engineering applications of cryogenics. A good application for material property variation is in the recycling industry. Cryogenic recycling uses low temperatures to separate materials.
Helium Cryogenics by Steven W. Van Sciver (auth.)
by Steven
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