Man cooling systems

The way in which the air is distributed over the body is of importance and should be noted. The Vortex man cooling system uses air cooled by the vortex tube conducted into the vest at an entrance fitting located at the small of the back. The air fills the vest, causing it to puff into a swollen appearance. The inner lining of the vest has hundreds of tiny holes that allow the air to escape all over the trunk area of the body. 

Filters — The use of an air purifying filter, is recommended for man cooling systems. It will serve two men in full suit systems (total flow of 50 scftn). The filter contains several filter materials, including activated charcoal, and will remove mists (including oil mist), water vapor and particles (down to 0.5 n in size) from the compressed air supply. Most important, it cleanses the air of any objectionable odor. The compressed air system should be tested for CO content. 

The foil suit system is well designed for use up to 200 F. In selecting the proper man cooling equipment, the source of heat is as important as the amount. Whenever the heat is primarily radiant, a reflectorized system is indicated. For example, workers near furnaces, forging presses, ovens, etc., should use the reflectorized clothing. The reflective coating will reflect up to 90% of incident radiant heat. Of course, any heat reflected does not have to be ofl%t by the vortex tube air conditioner. Systems are not intended to be used in severe heat situations, such as oven entry and tire entry applications. Highly specialized, very expensive equipment is made for these applications. 

An intermittent cooling system. The man connected to a source of cool air for a few minutes, became cool, disconnected and returned to work. The cool air was provided by forcing ambient air over a heat exchanger containing solid C02 Although freedom of motion was attained by this method, it was not effective under field conditions. 

Uses Detergent polymer for household, l l formulations, laundry detergents, dish-wash, all-purpose cleaners, food process cleaners antisealant for water treatment of boilers and cooling systems Manuf/Distrib. Aldrich Acrylic acid/maleic anhydride Synonyms AA/MAn... 

Hehum is used for low-temperature research (—272.2°C or 34°F). It has become important as a coolant for superconducting electrical systems that, when cooled, oiler httle resistance to the electrons passing through a conductor (wire or magnet). When the electrons are stripped from the hehum atom, a positive He ion results. The positive hehum ions (nuclei) occur in both natural and man-made radioactive emissions and are referred to as alpha particles. Hehum ions (alpha particles) are used in high-energy physics to study the nature of matter. 

An environmental control system for a manned spacecraft typically includes a condenser for controlling cabin temperature and humidity. As the moistureladen air is cooled in the small channels of the condenser, water normally condenses out as water droplets. In a microgravity environment, these water droplets tend to become entrained in the air stream and carried back into the cabin, failing to achieve water separation. In such an instance, the cabin air could become foggy. To effectively remove water from the air, heat exchanger surfaces could be coated with a hydrophilic zeolite... 

The coo Ii ng funct ion of this UHS system can be provided by cooling towers or the natural or man-made passive water sources (e.g., reservoirs, rivers or lakes). For the case of cooling towers, the structure should be designed to withstand the effects of natural phenomena including tornadoes, tornado missiles, hurricane winds, floods, and the design basis earthquake. 

Stability diagram for different metals, oxides, and carbides at 950°C. The hatched area represents the composition of a coal gasification environment. (From Schendler, W., in Corrosion Resistant Materials for Cool Conversion Systems, eds., D.B. Meadowcroft and M.I. Manning, Applied Science, Barking, London, U.K., 1983, p. 201.)... 

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