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Category : Life support systems (Space environment)
Languages : en
Pages :
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Book Description
Author:
Publisher:
ISBN:
Category : Life support systems (Space environment)
Languages : en
Pages :
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Author: Jack C. Hedge
Publisher:
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Category :
Languages : en
Pages : 34
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Book Description
Author: David L. Richardson
Publisher:
ISBN:
Category : Extravehicular space suits
Languages : en
Pages : 100
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Book Description
The program encompassed an analytical and experimental investigation of the application of passive thermal control techniques to extravehicular flexible space garments in 300 nautical mile earth orbits. Results indicate that passive thermal control by varying the absorptance and emittance of the outer surface of the garment is not possible when internal heat generated is in excess of 1500 Btu/hr. For all conditions, the suit's solar absorptance should be as small as possible and its emittance as large as possible. By controlling the conductance of the space suit wall, internal heating rates to 2000 Btu/hr are achievable when the space suit has an absorptance of 0.17 and an emittance of 0.85. A solar parasol with selected radiating properties on each side allows for higher internal heating rates. Experiments were made in a simulated noon orbit with a cylindrical section of a space suit which was first tested with an evacuated insulation and then with a helium-fillable insulation. The range of average conductance for these insulations was 0.3 to 4.0 Btu/sq ft hr F.A range of internal heat generation from 600 to 2100 Btu/hr was achieved when the evacuated insulation was filled with helium.
Author:
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ISBN:
Category : Science
Languages : en
Pages : 1776
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Book Description
Author: Jack C. Hedge
Publisher:
ISBN:
Category : Extravehicular space suits
Languages : en
Pages : 32
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Book Description
Thermal protection of the extravehicular astronaut was studied with particular attention to the relationship between thermal protection and mobility. The space thermal environment was reviewed with respect to the sources and magnitudes of heat energy delivered to the astronaut. The astronaut's thermal physiology was investigated. The basic thermal processes available for controlling the space suit temperature were considered and the state-of-the-art of active and passive thermal control systems was reviewed. The study concludes that a passive system alone cannot provide adequate extravehicular thermal protection. Recommendations are made for investigating hybrid thermal control systems and for studying means to improve the thermal protection of gloves with adequate tactility. (Author).
Author:
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Category : Government publications
Languages : en
Pages : 1654
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Author:
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ISBN:
Category : Body temperature
Languages : en
Pages : 296
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Book Description
Author: National Library of Medicine (U.S.)
Publisher:
ISBN:
Category : Medicine
Languages : en
Pages : 208
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Book Description
Author:
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Category : Aeronautics
Languages : en
Pages : 1426
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Book Description
Author: Jerry Bevans
Publisher: Elsevier
ISBN: 0323142117
Category : Science
Languages : en
Pages : 876
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Book Description
Progress in Astronautics and Aeronautics, Volume 21: Thermal Design Principles of Spacecraft and Entry Bodies is a collection of technical papers drawn mainly from the American Institute of Aeronautics and Astronautics Third Thermophysics Specialist Conference, held in Los Angeles, California on June 24-26, 1968 This volume is divided into three parts. The first part covers some aspects of thermal processes and design, including thermal analysis, convection, radiation, ablation, and space rocket effects. The second part surveys the remote measurements of the thermophysical and thermal radiation properties and joint conductance, which are critical criteria for space thermal design. The third part focuses on the space environmental effects on thermal coatings. This part deals first with the theory of radiative degradation, followed by a presentation of the laboratory measurements. This part also looks into the results of several flight experiments. This book will be of great value to thermophysicists, space engineers, and designers who are working in the space science fields.
