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Author :
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ISBN 13 :
Total Pages : 50 pages
Book Rating : 4.:/5 (317 download)
Download or read book Automatic Control of Human Thermal Comfort with a Liquid-cooled Garment written by and published by . This book was released on 1977 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Alan B. Chambers
Publisher :
ISBN 13 :
Total Pages : 84 pages
Book Rating : 4.:/5 (31 download)
Download or read book A Study of the Thermoregulatory Characteristics of a Liquid-cooled Garment with Automatic Temperature Control Based on Sweat Rate written by Alan B. Chambers and published by . This book was released on 1973 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Karen LuJean Nyberg
Publisher :
ISBN 13 :
Total Pages : 606 pages
Book Rating : 4.:/5 (438 download)
Download or read book Design and evaluation of automatic control for human/liquid cooling garment thermal interaction written by Karen LuJean Nyberg and published by . This book was released on 1998 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Clay W. G. Fulcher
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (86 download)
Download or read book Automatic Control of Liquid Cooling Garment by Cutaneous and External Auditory Meatus Temperatures written by Clay W. G. Fulcher and published by . This book was released on 1971 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "The invention relates to an automatic control apparatus for a liquid cooled spacesuit which maintains the temperature of the wearer at levels suitable for his actual physiological needs during varying periods of work and rest. The apparatus frees the crewman from the task of manual control and the problems incumbent with the possibility of premature or excessive cooling and insufficient cooling associated therewith. The invention is based on findings that change in mean body temperature is an index of heat tolerance since, under transient heat loads, mean body temperature rises as a linear function of heat stress. Accordingly, the apparatus of the present invention controls the temperature of the inlet water to the garment responsive to mean body temperature and its time rate of change. The cooling system includes a diverter valve 24 which is operated by an electro-pneumatic transducer 30 in response to control signals from controller 32. Temperature input signals are supplied to the controller 32 from temperature sensors attached to the wearer a t the ear canal, shoulder, chest, bicep, and lower abdomen. Changes in temperatures are electronically amplified, summed, and converted to a diverter valve command proportional to the deviation of the summed signal from a set point value and to the rate of change of the summed signal from its set point. The novelty of the invention lies in the combination of elements to provide a control for regulating the inlet water temperature of a liquid cooling garment which is automatically responsive to actual physiological needs of the wearer as measured by his mean body temperature and its time rate of change."--Page [i].
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ISBN 13 :
Total Pages : 64 pages
Book Rating : 4.:/5 (317 download)
Download or read book Liquid Cooled Garments written by and published by . This book was released on 1975 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Liquid cooled garments employed in several applications in which severe heat is encountered are discussed. In particular, the use of the garments to replace air line cooling units in a variety of industrial processing situations is discussed. (Author) (NTRL site)
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ISBN 13 :
Total Pages : 252 pages
Book Rating : 4.:/5 (3 download)
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1990 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Charles Nehme
Publisher : Charles Nehme
ISBN 13 :
Total Pages : 84 pages
Book Rating : 4./5 ( download)
Download or read book Garment Cooling: Innovations, Science, and Applications written by Charles Nehme and published by Charles Nehme. This book was released on with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Purpose of the Book In an increasingly globalized world where human activity often takes place in extreme climates, the importance of maintaining thermal comfort cannot be overstated. Whether it's athletes pushing their limits, workers laboring in hot environments, or patients recovering from medical procedures, the need for effective cooling solutions is paramount. This book, Garment Cooling: Innovations, Science, and Applications, aims to explore the rapidly evolving field of cooling garments—textiles and clothing designed to regulate body temperature, improve comfort, and enhance performance. The primary goal of this book is to provide a comprehensive guide to the technology, science, and real-world applications of garment cooling. We will delve into the history and evolution of cooling garments, examine the materials and technologies that make them effective, and explore their use across various industries. Additionally, we will look ahead to future trends and innovations that promise to revolutionize the field. Target Audience This book is intended for a diverse audience: Engineers and Designers who are developing the next generation of cooling garments and need a solid foundation in both the underlying science and the latest technological advancements. Researchers and Academics interested in the study of human thermoregulation and the role of textiles in temperature control. Athletes and Coaches seeking to understand how cooling garments can enhance performance and recovery. Healthcare Professionals exploring new therapeutic applications for cooling garments, particularly in the management of heat stress and other medical conditions. Industrial and Military Leaders looking for solutions to protect workers and soldiers from heat-related injuries. Consumers who are curious about how these garments can improve comfort in everyday life. Scope and Structure Garment Cooling: Innovations, Science, and Applications is structured to provide a thorough understanding of the subject, starting with the basic science of human thermoregulation and moving through the various technologies and materials used in cooling garments. We will explore the design and engineering challenges involved in creating effective cooling solutions and examine how these garments are applied across different industries. Each chapter is designed to build on the previous one, creating a cohesive narrative that guides the reader from fundamental principles to advanced applications. Key case studies will illustrate how cooling garments have been successfully implemented in real-world scenarios, while discussions on market trends and future directions will provide insights into the evolving landscape of this industry. By the end of this book, readers will have a deep understanding of the potential of garment cooling technology, as well as the challenges and opportunities that lie ahead. Whether you are a professional in the field or simply interested in the topic, this book will equip you with the knowledge needed to navigate and contribute to the ongoing advancements in garment cooling.
Author : Lawrence Howard Kuznetz
Publisher :
ISBN 13 :
Total Pages : 578 pages
Book Rating : 4.:/5 (31 download)
Download or read book Control of Thermal Balance by a Liquid Circulating Garment Based on a Mathematical Representation of the Human Thermoregulatory System written by Lawrence Howard Kuznetz and published by . This book was released on 1975 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Anthony Bruce Campbell
Publisher :
ISBN 13 :
Total Pages : 446 pages
Book Rating : 4.:/5 (468 download)
Download or read book Thermal Modeling, Analysis, and Control of a Space Suit written by Anthony Bruce Campbell and published by . This book was released on 1999 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The thermal dynamics of two space suits, the Space Shuttle EMU and the MPLSS Advanced Space Suit, are considered as they relate to astronaut thermal comfort control. The activities documented in this dissertation cover three related areas, modeling, analysis, and control. A detailed dynamic lumped capacitance thermal model of the operational Space Shuttle EMU is used to analyze the thermal dynamics of the system with observations verified using experimental and flight data. Prior to using the model to define performance characteristics and limitations for the space suit, the model is first evaluated and improved. This evaluation includes determining the effect of various model parameters on model performance and quantifying various temperature prediction errors in terms of heat transfer and heat storage. The thermal dynamics and design of an Advanced Space Suit are next considered. A transient model of the MPLSS Advanced Space Suit design is developed and implemented using MATLAB/Simulink, to help with sizing, with design evaluation, and with the development of an automatic thermal comfort control strategy. The model is described and the thermal characteristics of the Advanced Space Suit are investigated including various parametric design studies. The steady state performance envelope for the Advanced Space Suit is defined in terms of the thermal environment and human metabolic rate and the transient response of the human-suit-MPLSS system is analyzed. The observations and insights about the thermal dynamics of a space suit are then applied to the automatic thermal comfort control of the MPLSS Advanced Space Suit. Automatic thermal comfort control for the Advanced Space Suit is investigated using three proposed strategies. These strategies use a transient thermal comfort definition based on body heat storage. The first strategy is measurement based using a proposed body heat storage estimation method to determine the astronaut's thermal state. The second strategy is model based using a model to determine the desired liquid cooling garment inlet temperature to provide thermal comfort. The third strategy is a hybrid strategy combining the measurement based and model based approach using the Generalized Predictive Control framework. Each strategy then uses a resource allocation decision logic to determine which of three control mechanisms to use so that thermal comfort can be provided while minimizing the use of consumables. Accuracy and performance of the strategies are evaluated using simulations, highlighting their advantages and limitations."--Leaves iv-v.
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ISBN 13 :
Total Pages : 736 pages
Book Rating : 4.3/5 ( download)
Download or read book NASA Tech Briefs written by and published by . This book was released on 1978 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ivana Špelić
Publisher : CRC Press
ISBN 13 : 0429750641
Total Pages : 202 pages
Book Rating : 4.4/5 (297 download)
Download or read book Standard Methods for Thermal Comfort Assessment of Clothing written by Ivana Špelić and published by CRC Press. This book was released on 2019-06-20 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: Providing detailed analysis of the thermal comfort assessment of clothing as the basis for developing standards, this book discusses the thermal protective role of clothing as a way of modelling heat transfer from the body, general thermal regulation of humans, and the importance of globally accepted test methods and standards to improve quality. New materials and discoveries in the study of thermal comfort necessitate the need for standard improvements and update. The development of international standards and the unification of testing methods is of crucial significance to ensure cost reduction and health protection. The book promotes instruments, methods, implementation of unified specifications, and the definition of standards so that a clear quality management system can be established, for both production systems and testing methods. It discusses standards in ergonomics of the thermal environment, clothing thermal characteristics, and subjective assessment of thermal comfort, which allows for systematic control of the measuring methods and the services and final products that are distributed on the global market. This book is aimed at industry professionals, researchers, and advanced students working in textile and clothing engineering, comfort testing, and ergonomics.
Author : F. Wang
Publisher : Elsevier
ISBN 13 : 1782420401
Total Pages : 503 pages
Book Rating : 4.7/5 (824 download)
Download or read book Protective Clothing written by F. Wang and published by Elsevier. This book was released on 2014-08-04 with total page 503 pages. Available in PDF, EPUB and Kindle. Book excerpt: Protective clothing protects wearers from hostile environments, including extremes of heat and cold. Whilst some types of protective clothing may be designed primarily for non-thermal hazards (e.g. biological hazards), a key challenge in all protective clothing remains wearer comfort and the management of thermal stress (i.e. excessive heat or cold). This book reviews key types of protective clothing, technologies for heating and cooling and, finally, modeling aspects of thermal stress and strain. Explores different types of protective clothing, their uses and their requirements, with an emphasis on full-scale or prototype clothing, including immersion suits, body armour and space suits Considers novel and commercial technologies for regulating temperature in protective clothing, including phase change materials, shape memory alloys, electrically heated clothing and air and water perfusion-based cooling systems Reviews the human thermoregulatory system and the methods of modelling of thermal stress in protective clothing through various conditions, including cold water survival and firefighting
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ISBN 13 :
Total Pages : 178 pages
Book Rating : 4.3/5 (121 download)
Download or read book A Selected Bibliography on Hazardous Materials Control written by and published by . This book was released on 1983 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Johan K. Westin
Publisher :
ISBN 13 :
Total Pages : 126 pages
Book Rating : 4.:/5 (458 download)
Download or read book An Improved Thermoregulatory Model for Cooling Garment Applications with Transient Metabolic Rates written by Johan K. Westin and published by . This book was released on 2008 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Current state-of-the-art thermoregulatory models do not predict body temperatures with the accuracies that are required for the development of automatic cooling control in liquid cooling garment (LCG) systems. Automatic cooling control would be beneficial in a variety of space, aviation, military, and industrial environments for optimizing cooling efficiency, for making LCGs as portable and practical as possible, for alleviating the individual from manual cooling control, and for improving thermal comfort and cognitive performance. In this study, we adopt the Fiala thermoregulatory model, which has previously demonstrated state-of-the-art predictive abilities in air environments, for use in LCG environments. We validate the numerical formulation with analytical solutions to the bioheat equation, and find our model to be accurate and stable with a variety of different grid configurations. We then compare the thermoregulatory model's tissue temperature predictions with experimental data where individuals, equipped with an LCG, exercise according to a 700 W rectangular type activity schedule. The root mean square (RMS) deviation between the model response and the mean experimental group response is 0.16°C for the rectal temperature and 0.70°C for the mean skin temperature, which is within state-of-the-art variations. However, with a mean absolute body heat storage error [mean absolute error subscript BHS] of 9.7 W·h, the model fails to satisfy the "6.5 W·h accuracy that is required for the automatic LCG cooling control development. In order to improve model predictions, we modify the blood flow dynamics of the thermoregulatory model. Instead of using step responses to changing requirements, we introduce exponential responses to the muscle blood flow and the vasoconstriction command. We find that such modifications have an insignificant effect on temperature predictions. However, a new vasoconstriction dependency, i.e. the rate of change of hypothalamus temperature weighted by the hypothalamus error signal ([delta]T[subscript hy]·dT[subscript hy]/dt), proves to be an important signal that governs the thermoregulatory response during conditions of simultaneously increasing core and decreasing skin temperatures, which is a common scenario in LCG environments. With the new [delta]T[subscript hy]·dT[subscript hy]/dt dependency in the vasoconstriction command, the [mean absolute error subscript BHS] for the exercise period is reduced by 59% (from 12.9 W·h to 5.2 W·h). Even though the new [mean absolute error subscript BHS] of 5.8 W·h for the total activity schedule is within the target accuracy of "6.5 W·h, [mean absolute error subscript BHS] fails to stay within the target accuracy during the entire activity schedule. With additional improvements to the central blood pool formulation, the LCG boundary condition, and the agreement between model set-points and actual experimental initial conditions, it seems possible to achieve the strict accuracy that is needed for automatic cooling control development.
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ISBN 13 :
Total Pages : 648 pages
Book Rating : 4.:/5 (319 download)
Download or read book NASA Technical Note written by and published by . This book was released on 1973 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 366 pages
Book Rating : 4.:/5 (318 download)
Download or read book Journal of Biomechanical Engineering written by and published by . This book was released on 1980 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 9 pages
Book Rating : 4.:/5 (183 download)
Download or read book Phase II Testing of Liquid Cooling Garments Using a Sweating Manikin, Controlled by a Human Physiological Model written by and published by . This book was released on 2006 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:
