Cooling absorption

C 0.35 Recovery of low level waste heat f space heating, district heating syste Absorption cooling. Recovery of steam condensate and flash steam. Heat pump for evaporation, drying, etc. 3r m. 

In addition to close cycle absorption cooling, open cycles are of potential interest. Desiccants can be used to absorb water vapor from room air, which then can be evaporatively cooled. The desiccant is regenerated and recycled, LOf has suggested the use of triethylene glycol as a desiccant, with solar-hcatcd air for regeneration. Lithium chloride also has been proposed as a desiccant. 

Hess Microgen has a unit that can provide electricity, absorption cooling and hot water. The Starwood hotel chain is using Hess Microgen units in its hotels. 

LITHIUM BROMIDE - A chemical used in combination with water in absorption cooling systems. 

Absorbent - A material that extracts one or more substances from a fluid (gas or liquid) medium on contact, and which changes physically and/or chemically in the process. The less volatile of the two working fluids in an absorption cooling device. 

Absorption Chiller - A type of air cooling device that uses absorption cooling to cool interior spaces. 

Absorption Cooling - A process in which cooling of an interior space is accomplished by the evaporation of a volatile fluid, which is then absorbed in a strong solution, then desorbed under pressure by a heat source, and then recondensed at a temperature high enough that the heat of condensation can be rejected to a exterior space. 

Require high loading to achieve modest flame retardance. Low cost. Low smoke advantage. Nontoxic. Multifunctional extender. Flame-retardant mechanism endothermic (heat-absorption) cooling of flame upon release of water of hydration... 

The tepid requirement is important. It encourages users to complete the full 15-minute drench period which helps prevent chemical absorption, cool bums and prevents hypothermia. The standard also modified the eyewash flow verification procedures. The standard now mandates that when placing the testing gauge in the stream of the eyewash the flushing fluid shall cover the areas between the interior and exterior lines of the gauge at some point less than eight inches above the eyewash nozzle. 

An earlier patent from the US Department of Energy desoibes a different approach to hnking fuel cells and gas turbine cycles (Anon, 1993). An indirectly heated gas turbine (GT) cycle is followed by a fuel cell cycle, the heated air from the turbine being used to directly heat the fuel cell cathode. The hot cathode recycled gases provide a substantial part of the heat required for indirect heating of the compressed air used in the GT. A separate combustor provides the balance of the heat needs. Hot gases from the fuel cell reduce the GT fuel needs and also the NO emissions. Residual heat from the fuel cell may be used in a steam cycle or for absorption cooling. 

So far, this chapter has strongly focussed on the application of ionic liquids in catalytic applications and separation technologies. It should be noted, however, that ionic liquids also started to make, in the last decade, a significant impact in other areas of engineering, most inportandy in the areas of lubrication, process machinery and absorption cooling. 

If we consider the case in which both the SOFC and PEM systems have the same power output and efficiency, then the heat, which is the enthalpy content, of the exhaust streams produced by both systems will be the same. However, the heat produced by the SOFC will be at a higher temperature and therefore has a higher exergy than that from a PEM fuel cell. We can, therefore, say that the heat from an SOFC is more valuable. The heat that is liberated in a PEM fuel cell is around 80°C and has limited use both within the system and for external applications. For the latter, it may be limited to air space heating, or possibly integration with an absorption cooling system. The heat that is produced by an SOFC on the other hand is exhausted at temperatures of around 1000°C and is clearly more valuable, as it can also be used, as we have seen, in a bottoming cycle. 

J Z Wang, D X Zheng. Performance analysis of absorption cooling cycle utilizing TFE-... 

Chartered Institution of Building Services Engineers. Absorption Cooling England, 2012. 

Hondeman, H. Electrical Compression Cooling versus Absorption Cooling - A Comparison. lEA... 

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