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Topic: Desiccant

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	Appropriate desiccant selection can improve product (IVDT archive, Jun 02)
		Desiccant canisters are considered the gold standard among the desiccants used in the pharmaceutical industry.
		Desiccant cap inserts are used in conjunction with screw-on caps for rigid containers.
		Absorption capacity is measured by exposing the desiccant to specified, static conditions and observing its weight increase, which is given as a percentage of the desiccant weight.
	www.devicelink.com /ivdt/archive/02/06/002.html (2882 words)

	Desiccation - Wikipedia, the free encyclopedia
		Desiccation is the state of extreme dryness, or the process of extreme drying.
		A desiccant is a substance that adsorbs water.
		Desiccated coconut is the dried, finely shredded flesh of the coconut, much used in cooking desserts.
	en.wikipedia.org /wiki/Desiccant (343 words)

	DOE Building Technologies Program: Desiccant Dehumidification
		Desiccant dehumidification systems are growing in popularity because of their ability to remove moisture from outdoor ventilation air while allowing conventional air-conditioning systems to deal primarily with control temperature.
		Desiccant dehumidification is a new approach to space conditioning that offers solutions for many of the current economic, environmental, and regulatory issues being faced by facility managers.
		Desiccant dehumidification is particularly attractive in applications where building exhaust air is readily available for an energy-recovery ventilator (ERV, or "passive" desiccant system) or where a source of waste heat from other building operations is available to regenerate an "active" desiccant system.
	www.eere.energy.gov /buildings/info/components/hvac/cooling/desiccant.html (585 words)

	desiccant cooling
		Unlike conventional air conditioning systems, which rely on electrical energy to drive the cooling cycle, desiccant cooling is an open heat driven cycle, which uses a desiccant wheel and thermal wheel in tandem to achieve both cooling and dehumidification.
		Desiccant materials, which absorb moisture, can be dried, or regenerated, by adding heat supplied by natural gas, waste heat, or the sun.
		Desiccant cooling can also be used in tandem with an conventional air conditioning system in which the desiccant removes humidity and the AC system provides cooling, and in energy recovery ventilators (ERV) to dehumidify incoming fresh air in the summer.
	www.daviddarling.info /encyclopedia/D/AE_desiccant_cooling.html (253 words)

	Desiccant silica gel for Compressed Air Dryers -- Condit Company
		Desiccant activated alumina is an excellent all-purpose desiccant for drying air and most other gases with high relative humidities.
		Desiccant silica gel is a very effective desiccant for drying air and often used to dry natural gas.
		Desiccant silica gel is odorless, non-toxic, and non-corrosive, with stable chemical and thermal characteristics.
	www.conditcompany.com /desiccant.htm (734 words)

	Desiccant (Site not responding. Last check: 2007-10-21)
		The desiccant composition of claim 1 wherein the deliquescent salt is selected from the group consisting of alkali, ammonium, alkali earth, earth and transition metal halides, sulfates, sulfites, thiosulfates, nitrates, nitrites, phosphates, carbonates and carboxylates.
		The volume of water or water vapor absorbed by the desiccant container is generally determined by the absorbent capacity of the desiccant material contained within the container and the temperature and relative humidity level of the surrounding air.
		By using the preferred desiccant material (14) formed from a deliquescent salt and a modified starch, lesser quantities of the desiccating material may be necessary than is used in conventional desiccating containers and still achieve the same level of moisture absorbency.
	www.qiaoyun.net /desiccants/desiccant63.htm (4961 words)

	Desiccant silica gel for Compressed Air Dryers -- Condit Company
		Desiccant activated alumina is an excellent all-purpose desiccant for drying air and most other gases with high relative humidities.
		Desiccant silica gel is a very effective desiccant for drying air and often used to dry natural gas.
		Desiccant silica gel is odorless, non-toxic, and non-corrosive, with stable chemical and thermal characteristics.
	conditcompany.com /desiccant.shtml (734 words)

	Desiccant Regeneration
		Desiccant bags should be allowed to remain in the oven at the assigned temperature for 24 hours.
		After the bags of desiccant have been allowed to cool in an airtight desiccator, they may be removed and placed in either an appropriate type poly liner tightly sealed to prevent moisture adsorption, or a container that prevents moisture from coming into contact with the regenerated desiccant.
		After the desiccant has been allowed to cool in an airtight desiccator,refill the TYVEK pouches, re-seal the pouch with a heat sealer and place in either an appropriate type poly liner tightly sealed to prevent moisture adsorption, or a container that prevents moisture from coming into contact with the regenerated desiccant.
	www.foodsave.net /desiccan.htm (599 words)

	Liquid Desiccant Tutorial
		The dilute desiccant that leaves the conditioner is pumped to the regenerator.
		The hot, concentrated desiccant that leaves the regenerator and the cool, dilute desiccant that flows to the regenerator exchange thermal energy in the interchange heat exchanger.
		As noted earlier, the flow rates of liquid desiccant in both the conditioner and the regenerator are very low--typically a factor of 10 to 20 lower than in conventional packed-bed liquid-desiccant equipment.
	www.ailr.com /liquid_desiccant_tutorial.htm (1186 words)

	Desiccant Activation Test
		Desiccant is the most important and most volitile part of your old desiccant drying system for your resins.
		Protecting the hands with gloves, obtain a sample (3 to 4 ounces) of the desiccant from the active area of the bed, at least 4" down from the top of the bed on (small/medium sized dryer), and 6" down on larger dryers.
		The desiccant may be well reactivated, but the presence of powdered or chipped desiccant sifting to the bottom of the bed.
	www.cometauxiliary.com /html/tips_desiccant.htm (476 words)

	Desiccant Systems
		Desiccant systems in HVAC applications, an alternative or supplement to mechanical refrigeration, are used primarily where simultaneous maintenance of temperature and humidity control is an important benefit to the user.
		Desiccant cooling is also considered in all-air systems where 100% outside air is required (clean rooms, hospital operating rooms, laboratories, and some restaurants), in supermarkets, in humid climates, and ice rinks.
		Outdoor air is dehumidified by the desiccant wheel, a cooling coil reduces the air temperature to the desired dew point, and the reheat coil raises the air to the desired dry bulb temperature.
	cipco.apogee.net /ces/library/tdds.asp (1859 words)

	Desiccant Dehumidification Beats Heat as Construction Drying Method (CSP)
		Desiccant dehumidifiers have proved effective to create low relative humidity and dew points when drying air at a condition far from saturation or at low temperatures.
		Desiccant units used for drying are different than those used as permanent installations in commercial buildings.
		Desiccants can attract and hold from 10 to more than 10,000 percent of their dry weight in water vapor.
	www.ifma.org /daily_articles/2006/aug/08_03.cfm (1497 words)

	An Introduction to Gas Cooling & Desiccant Humidity Control
		Desiccant systems remove moisture from air using a desiccant for controlling humidity in commercial and institutional buildings for comfort, and in industrial processes for improving product quality.
		When a desiccant is cool and dry it removes moisture from humid air and thus, reduces its humidity level.
		As the desiccant collects water, its vapor pressure and temperature rise, until the vapor pressure of air and desiccant are the same, and the desiccant can no longer attract water vapor.
	www.gastechnology.org /webroot/app/xn/xd.aspx?it=enweb&xd=GasCooling\Tutorials\DesicantSystems\tdintro.xml&bd=cpbs (1061 words)

	Multisorb - Protection through Desiccant Technology (Site not responding. Last check: 2007-10-21)
		As the desiccant in the container adsorbs moisture from the airspace, moisture is then given up by the cotton to the airspace in an attempt to reach a new equilibrium.
		The desiccant adsorbs moisture much more strongly than the cotton (comparing their heats of adsorption/desorption) and will continue to dry out the cotton until it is either saturated or no more moisture is available.
		In a porous desiccant, water is removed from the airspace by: 1) multilayer adsorption, which is the attraction of thin layers of water molecules to the surface of the desiccant.
	www.multisorb.com /library/techpapers/protection_html (3790 words)

	Application NoteRegenerating the ST (Site not responding. Last check: 2007-10-21)
		The purpose of the desiccant is to absorb the small amount of moisture in the air within the CCD chamber so that no condensation will form as the CCD is cooled.
		Carefully remove the desiccant, which is a "coffee" colored ring, from around the CCD by lifting it up from the camera.
		You may want to replace the nosepiece while the desiccant is "baking" to prevent dust from settling inside the CCD chamber.
	www.sbig.com /sbwhtmls/desiccantst4.htm (311 words)

	Erowid Psychoactives Vault : Storage Basics : Desiccant
		A second method is to put a layer of desiccant or desiccant packs in the bottom of a sealable container such as a glass canning jar or plastic box.
		A small glass jar can be half fi lled with desiccant pellets and then the top of the jar "sealed" with a piece of airpermeable fabric or two layers of coffee filter secured with string or a rubber band.
		Most desiccant is fairly inexpensive, can be reused for years, and helps maintain the quality of materials stored over long periods of time.
	www.erowid.org /psychoactives/basics/basics_storage2.shtml (925 words)

	Desiccant and Solar Desiccant Systems
		Gaia Research have been undertaking research to determine whether desiccant cooling technology using gas-solar generated low temperature heat for regeneration, might be reliable and cost effective in the UK in the near future.
		Desiccant cooling is a new and potentially clean technology, which can be used to condition the internal environment of buildings and operates without the use of harmful refrigerants.
		Desiccant cooling is a new and potentially environmentally friendly technology, which can be used to condition the internal environment of buildings without the use of traditional refrigerants.
	www.gaiagroup.org /Research/RI/solarac (1177 words)

	Desiccant Care
		Make sure a fresh desiccant cartridge is attached to the atmospheric pressure reference (APR) port located on the bottom of the Flo-Logger housing (see photo).
		The desiccant cartridge protects the APR tube from moisture and debris affecting the accuracy of the surcharge level pressure transducer.
		Whenever a desiccant cartridge turns mostly pink, it should be replaced with a fresh (blue) cartridge.
	www.marsh-mcbirney.com /Support/desiccant_care.htm (95 words)

	Peoples Gas - Desiccant
		Desiccant systems can be used to significantly reduce the overall size of air conditioning systems, which means lower peak electric demand and reduced electricity costs.
		Desiccant technology is also leading the way to help businesses comply with ASHRAE Standard 62.
		Desiccants are better equipped to handle the high humidity levels in fresh air than refrigeration-based cooling, making them the preferred technology for improving indoor air quality.
	www.peoplesgas.com /business/products/desiccant (293 words)

	Desiccant Systems
		Consequently, desiccant based systems tend to be used in a series with conventional cooling equipment.
		Another alternative to these desiccant concepts worthy of side-by-side comparison is the heat pipe, which is much simpler and may provide the same performance.
		Desiccant systems are widely used in low humidity applications such as pharmaceutical powder production and packaging.
	tristate.apogee.net /cool/ccd.asp (426 words)

	Desiccant, Capsule Dehydrators
		Desiccants protect all types of articles from deterioration, rust, corrosion, mold, mildew and other damage caused by moisture or high humidity.
		Simply place desiccants together with the article to be protected in a tightly closed or sealed moisture resistant container.
		Desiccants will rapidly and actively desiccate the surrounding air and keep it that way to protect against moisture damage.
	www.tedpella.com /desiccat_html/descant.htm (552 words)

	MeadWestvaco : Desiccant Paper
		Our desiccant paper is a clean paper that is capable of absorbing significant quantities of moisture once it is activated.
		Desiccant paper is formulated with silica gel and cellulose fiber and can be designed into the structure of the product.
		In inactivated form, the desiccant paper is available in sheets or rolls up to 63 inches wide.
	www.meadwestvaco.com /specialtypapers.nsf/v/desiccantPaper?OpenDocument (115 words)

	PSYCHROMETRICS for Engineers
		The process involves exposing the desiccant material to a high relative humidity air stream, allowing it to attract and retain some of the water vapor and then exposing the same desiccants to a lower relative humidity air stream which has the affect of drawing the retained moisture from the desiccant.
		Some desiccant dehumidifiers use a cyclical type of operation where the desiccant is packed into a container through which the air to be dehumidified is passed.
		When the desiccant in the container reaches a certain level of moisture content a low humidity air stream is then passed through the container until the desiccant is dry enough to be used for dehumidifying again (regenerated).
	www.linric.com /desicc.htm (949 words)

	Plastics Machinery and Auxiliaries
		Also, the smaller beads are more suited to desiccant dryers because of their greater ratio of surface area per density that allows them to heat up and cool down faster.
		For purging of moisture from the desiccant, a blower pushes air through a heater until the air is heated to a high temperature.
		As the heated air moves through the desiccant, air pressure and velocity are reduced causing the air to expand—allowing longer contact time between air and desiccant—and resulting in efficient desiccant heating.
	www.pma-magazine.com /articles/2004/March/10 (1325 words)

	Commercial Desiccants
		Desiccant canisters are specifically designed for use in automated packaging systems.
		Desiccant mediums available are: silica gel, activated clay, molecular sieve, carbon, and various combinations of these.
		Activated Clay desiccant is a low-cost efficient desiccant which is mined, ground, processed and packaged.
	www.foodsave.net /commercial_desiccants.htm (573 words)

	Desiccant Cooling/Dehumidification
		Desiccant cooling systems are best suited to health-care buildings where healthy indoor air is critical, and to buildings housing humidity-sensitive processes, for example, microelectronics, photography, printing and archiving.
		Desiccant cooling may be practical for office buildings in southern and coastal Canada with central air handling systems; in these buildings, dehumidification can offset the cost of other system components.
		Desiccant cooling is not suitable for small unitary systems, except where heat recovery is already going to be provided and the upgrade cost to a desiccant-coated heat wheel is small.
	www.advancedbuildings.org /main_t_heat_desiccant_cooling.htm (627 words)

	Desiccant Cooling
		A desiccant system can be combined with a conventional air conditioning system in which the desiccant removes humidity and the air conditioner lowers air temperature.
		The use of desiccant cooling for residential use is being explored in conjunction with energy recovery ventilators (ERV).
		Desiccant cooling wheels could be situated through the wall or attached to ductwork.
	www.toolbase.org /Technology-Inventory/HVAC/desiccant-cooling (677 words)

	Indicating Desiccant is environmentally safe., Sphinx Adsorbents, Inc.
		Desiccant contains no cobalt chloride, is biologically harmless, and may be regenerated and fully reactivated by heating.
		A new, environmentally friendly indicating desiccant that contains no cobalt chloride (a heavy metal) and has a high water adsorption capacity for industrial, medical, and laboratory applications where moisture control is critical is being introduced by Sphinx Adsorbents, Inc. of Springfield, Massachusetts.
		Sphinx Indicating Silica Gel Desiccant changes color from yellow to green as it adsorbs up to 35% of its own weight in moisture and, unlike cobalt chloride, is biologically harmless.
	news.thomasnet.com /fullstory/26064/1303 (482 words)

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