Active cooling system

A range of active and proactive systems used in protective clothing to control the temperature and humidity of the clothing microclimate, such as an active cooling system using ice, water and Peltier plate are discussed. 

Active cooling system in protective clothing for clothing comfort... 

Due to its universal applicability and excellent safety features, the modular HTR power plant is suitable for erection on any site, but particularly on sites near other industrial plants or in densely populated areas. TTie principal safety feature of the HTR-Module is based on the fact that, even in the case of failure of all active cooling systems and complete loss of coolant, the fuel element temperatures remain within limits at which there is virtually no release of radioactive fission products from the fuel elements, due to ... 

A battery used in high power applications may be often subjected to significant amoimts of heat dissipated inside the cells. In order to ensure safe cell temperatures and high power capabilities, the battery may be equipped with an active cooling system that might be imder control of the BMS. 

To deal with the abovementioned challenges, a number of CFM subsystems can be implemented upstream within the propellant tank as illustrated in Figure 1.3. Passive multilayer insulation (MLI) systems, lightweight, low thermal conductivity tank support struts, as well as optimized active cooling systems, such as broad area cooling (BAC) shields or... 

Silicates. For many years, siUcates have been used to inhibit aqueous corrosion, particularly in potable water systems. Probably due to the complexity of siUcate chemistry, their mechanism of inhibition has not yet been firmly estabUshed. They are nonoxidizing and require oxygen to inhibit corrosion, so they are not passivators in the classical sense. Yet they do not form visible precipitates on the metal surface. They appear to inhibit by an adsorption mechanism. It is thought that siUca and iron corrosion products interact. However, recent work indicates that this interaction may not be necessary. SiUcates are slow-acting inhibitors in some cases, 2 or 3 weeks may be required to estabUsh protection fully. It is beheved that the polysiUcate ions or coUoidal siUca are the active species and these are formed slowly from monosilicic acid, which is the predorninant species in water at the pH levels maintained in cooling systems. 

Another important bisphenol is dichlorophene (dichlorophane, methylene-bis(4-chlorophenol)) [97-23-4]. Whereas it is not as active against bacteria as hexachlorophane, it has found miscehaneous apphcations, eg, as a rot preservative for textiles (89) as a treatment for athlete s foot and for tapeworm in humans and domestic animals as a slimicide in paper manufacture and as an antibacterial agent in water-cooling systems (90). 

An active solar heating and cooling system consists of a solar energy collector (flat plate or concentrating), a storage component to supply heat when the... 

Because of their surfactant and filming properties fatty amines such as coco-alkylamine acetate (and more especially diamines, such as tallow propylenediamine) are also occasionally employed in other types of water treatment programs. For example, they may be used as corrosion inhibitors for steel cooling systems, especially those smaller units where minimal operational control is provided. The amines must be continuously dosed to ensure good film formation (and thus corrosion protection), typically at 5 to 10 ppm active amine. They also tend to have good biostatic control properties, which provide a benefit of algal and bacterial control at no extra cost. 

The active micro-channel cooling contains a cooling system centered on a microheat collector that is fabricated much in the same way as the chip. Heat collector usually has a dense amount of micro-channels etched into the surface that works to transfer heat to a fluid, which is circulated through the entire package. 

Active systems that use the cold of the night air are usually called free cooling systems. 

Shredding and fractionation of the main unit takes place under partial vacuum in a special shredder. PU foamed with CFCs is pressed out as completely as possible. The vitiated air from the shredder and the press is cleaned through activated carbon and passed through a condensation cooling system. By this means, the foaming agent may be almost entirely recovered. 

There has been an accelerated interest in polymer electrolyte fuel cells within the last few years, which has led to improvements in both cost and performance. Development has reached the point where motive power applications appear achievable at an acceptable cost for commercial markets. Noticeable accomplishments in the technology, which have been published, have been made at Ballard Power Systems. PEFC operation at ambient pressure has been validated for over 25,000 hours with a six-cell stack without forced air flow, humidification, or active cooling (17). Complete fuel cell systems have been demonstrated for a number of transportation applications including public transit buses and passenger automobiles. Recent development has focused on cost reduction and high volume manufacture for the catalyst, membranes, and bipolar plates. 

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