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Topic: Gas absorption refrigerator

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	Absorption refrigeration - Information from Reference.com
		The absorption refrigerator is a refrigerator that utilizes a heat source to provide the energy needed to drive the cooling system rather than being dependent on electricity to run a compressor.
		A single-pressure absorption refrigerator uses three substances: ammonia, hydrogen gas, and water, whereas large industrial units generally use only two, a refrigerant such as ammonia, and an absorbent such as water (with an expansion valve and pump, not described here).
		The absorption refrigerator was invented by Baltzar von Platen and Carl Munters in 1922, while they were still students at the Royal Institute of Technology in Stockholm, Sweden.
	www.reference.com /search?q=Absorption+refrigeration (1398 words)

	Gas absorption refrigerator - Wikipedia, the free encyclopedia
		These refrigerators have the disadvantage of using a lethal gas, ammonia, although it is contained within a closed system; and if they are being run using an open flame then attention has to be paid to its safety and to maintaining the flame at an appropriate size.
		A conventional electric refrigerator uses a pump to compress the gas back to liquid; a gas absorption refrigerator uses another liquid to absorb the gas and then has extra stages to separate the pure refrigerant liquid out again for re-use, this extra part being where the heat source is involved.
		Gas absorption cooling principles can be applied at other temperatures, notably for air-conditioning where water may be the refrigerant, evaporated at low pressure and absorbed into a salt solution.
	en.wikipedia.org /wiki/Gas_absorption_refrigerator (1012 words)

	Refrigeration - LearnThis.Info Enclyclopedia (Site not responding. Last check: 2007-10-17)
		Refrigeration (from the Latin frigus, frost) is generally the cooling of a body by the transfer of a portion of its heat away from it.
		The refrigerator was invented in 1876 by Carl von Linde.
		The gas absorption refrigerator, which cools by the use of a source of heat, was invented in Sweden by Baltzar von Platen in 1922.
	encyclopedia.learnthis.info /r/re/refrigeration.html (529 words)

	Ammonia Refrigerators Absorption type
		It is assumed by the Author that you have some knowledge of refrigeration and are aware of the cycles and pressures of refrigeration in general.
		A pressure differential is essential to the refrigeration cycle as it causes the liquid ammonia to change it's boiling point from a high pressure flash of temperature to a lower pressure flash off temperature.
		The total pressure of the air in a compressed air cylinder is the sum of the oxygen, nitrogen, and the carbon dioxide gases, and the water vapor pressure.
	www.nh3tech.org /absorption.html (1477 words)

	Gas Refrigerator
		Since a refrigerant (such as Freon, ammonia or Carbon Dioxide) is ultimately absorbed at one point in the system, the gas refrigerator is known as an absorption refrigerator (1).
		The gas enters the rectifier which is an amalgam of a heat exchanger and condenser created to purify the gas by taking away the heat and water.
		The downfall of the gas refrigerator was due to three things: the lack of capital available to the manufacturers; the stagnation of gas companies compared to the meteoric rise of electric companies; and the late arrival of the gas type model.
	otal.umd.edu /~vg/amst205.F97/vj09/project5.html (920 words)

	Refrigerator -
		The capacity of a refrigerator is measured in litres (or cubic feet).
		Disposal of discarded refrigerators is very often strictly regulated by municipalities, by mandating the removal of doors, as many children playing hide-and-seek have been asphyxiated while hiding inside a discarded refrigerator.
		The first refrigerators were of the "remote" type, essentially an upgrade of an existing ice box with the installation of a cooling unit in it, but the motor, compressor and condenser installed either beside it or in the basement.
	psychcentral.com /psypsych/Refrigerator (1440 words)

	:::► Dictionary of Meaning www.mauspfeil.net ◄::: (Site not responding. Last check: 2007-10-17)
		Domestic refrigerators are common in kitchens, with separate sections or separate machines for cooling and freezing.
		For example, absorption of gaseous ammonia into water is used in most gas absorption refrigerators, and the Einstein refrigerator is a version of this which contains no moving parts — the cooling effect in this case coming from the heat absorbed by the ammonia when it evaporates from the water.
		The gas absorption refrigerator, which cools by the use of a source of heat, was invented in Sweden by Baltzar von Platen (1898-1984) Baltzar von Platen in 1922.
	www.mauspfeil.net /refrigeration.html (735 words)

	Troubleshooting The Cooling Unit Core
		Natural gas, LP gas, kerosene, steam, or an electric heating element may be used for the heat source, allowing the user to operate the unit safely and with ease.
		Normal refrigeration is considered 38° to 40° F in the box; while 0° F is the target in the freezing compartment (all temperatures are nominal).
		Roll the refrigerator, hit it with a hammer, or ride down a bumpy road with the unit in the bed of a truck, or flip it upside down for a day and then return it to its upright position.
	www.rvrefrigeration.com /article2.asp (898 words)

	Patents in Class 62/238.3
		An absorption cooling machine of the type which uses a refrigerant and an absorbent and which includes a high stage generator, absorber, condenser, heat exchangers, and an evaporator and means for connecting the components to one another...
		A system for generating refrigeration wherein a hot process fluid is used to drive a thermoacoustic engine and residual heat from the process fluid is used to desorb refrigerant from a high pressure absorbent heat pump solution with the...
		LPG and gasoline are recovered from catalytic reformer plant treat gas and net gas by refrigeration-induced condensation and separation, using reformer plant waste heat to produce the refrigeration in an ammonia absorption refrigeration...
	www.freepatentsonline.com /CCL62-238.3.html (2050 words)

	Gas Refrigeration Corporation 1927 signed by Stuart Otto
		Inside its walls, a refrigerant (ammonia, usually) is heated by a gas flame so as to vaporize; the ammonia gas then dissolves (or is absorbed into) a liquid (water, usually), and as it dissolves it simultaneously cools and condenses.
		The absorption of ammonia in water automatically alters the pressure in the closed system and thus keeps the refrigerant flowing, hence making it possible for heat to be absorbed in one place and released in another, just as it would be if the flow of the refrigerant were regulated by a compressor.
		The gas utilities, notoriously conservative companies, were defending themselves against the encroachments of electricity and were not helpful; they complained that Servel was badly managed, that its refrigerators were more expensive than comparable electric machines, and that the lack of another manufacturer meant a lack of models with which to interest prospective customers.
	www.scripophily.net /gasrefcor.html (1181 words)

	Sunline Coach Co. - Cool Tips (Site not responding. Last check: 2007-10-17)
		Water, ammonia, hydrogen gas and sodium chromate are combined under pressure in a containment vessel, sometimes known as a generator or boiler.
		The water, ammonia and hydrogen gas are directly involved in the cooling process, but the sodium chromate's job is to prevent the heat from corroding the pipes.
		As an electrical heating element or gas burner brings the solution to a boil, the liquid percolates up the pump tube, and the ammonia is distilled out of the solution and continues to rise up the tube as a gas.
	www.sunlinerv.com /page.cfm?adv_cooltips (2095 words)

	Howstuffworks "Gas and Propane Refrigerators"
		These refrigerators are interesting because they have no moving parts and use gas or propane as their primary source of energy.
		A gas refrigerator uses ammonia as the coolant, and it uses water, ammonia and hydrogen gas to create a continuous cycle for the ammonia.
		The ammonia gas flows upward to the condenser.
	home.howstuffworks.com /refrigerator5.htm (341 words)

	rv refrigerator ammonia absorption cooling (Site not responding. Last check: 2007-10-17)
		The refrigerant in LP gas/ electric refrigerators is ammonia- the oldest...
		Instead of mechanically compressing a gas (as occurs with a vapor-compression refrigeration cycle), absorption cooling relies on a...
		The cooling unit, or coils, of an ammonia absorption refrigerator is the heart of the refrigerator--it does the actual cooling.
	www.getrefrigeratorinfo.com /36/rv-refrigerator-ammonia-absorption-cooling.html (357 words)

	Refrigerator
		An ammonia absorption cooling unit is the set of cooling coils in any refrigerator that uses heat (such as propane) to operate.
		LP Gas, 12v Dc electric or 110v AC electric all they do is use a different heat source to heat the ammonia.
		Should your refrigerator require repair, you can either contact the manufacturer for a list of authorized repair centers, or you can contact an aftermarket repair company like RV Mobile, Inc. As a matter of fact, RV Mobile runs a web message board for refrigerator questions.
	www.title-3.com /Refrigerator.htm (816 words)

	Lars Poulsen's VANAGON Annex (Site not responding. Last check: 2007-10-17)
		Absorption refrigerators are silent, can withstand the rigors of highway travel and use far less energy to transfer heat than compressor-type units, but, unlike the latter, they are limited to about a 50- to 60-degree difference between outside and inside temperatures.
		This gas then flows by gravity through a pipe to recombine with the water to begin the process again, which is why sufficient leveling is to be observed.
		In a coach I used several years ago, I installed a battery-powered fan, which was mounted on the wood platform at the left rear of the refrigerator, and i experienced a documented improvement of 5 to 8 degrees in the refrigerator section.
	www.beagle-ears.com /lars/vanagon/vwrefr3.htm (2000 words)

	Gas Refrigerators, Servel, Crystal Cold, Dometic (Site not responding. Last check: 2007-10-17)
		Gas refrigerators are extremely reliable, efficient, and quiet.
		Our gas refrigerators are either freestanding, built-in, or portable for you to take camping or to your next tailgate party.
		Ammonia absorption refrigeration is a popular cooling alternative for a cabin retreat of even in your permanent residence.
	www.gas-refrigerators.com (207 words)

	RV.Net Open Roads Forum: Fifth-Wheels: Leveling (Site not responding. Last check: 2007-10-17)
		Refrigerators used today are not as sensitive to off-level as they used to be 15 - 20 years ago, or so said a representative of Dometic at a recent rally.
		If you have a gas absorption refrigerator, normal leveling of the vehicle is sufficient.
		The refrigerator is made to operate within 3 degrees off-level, side-to-side and 6 degrees off-level, front-to-back (looking at the front of the refrigerator).
	www.rv.net /forum/Index.cfm/fuseaction/thread/tid/14988695.cfm (528 words)

	Vol7No3 (Site not responding. Last check: 2007-10-17)
		The gas refrigerator operates on a principle of physics.
		The chemicals used in a gas refrigerator are distilled water, ammonia and hydrogen.
		The result is ammonia mixing with hydrogen inside the refrigerator, absorbing heat, and ammonia mixing with water outside of the refrigerator, expelling heat.
	www.gulfstreamcoach.com /tidbitstuff/Vol7No3.html (566 words)

	Nova Independent Resources Ltd. (Site not responding. Last check: 2007-10-17)
		If this refrigerator is run by a solar electric system whose DC power is inverted to AC by an efficient inverter, then the refrigerator/freezer alone will consume more power than 10 (50 watt) solar electric modules can produce per day.
		Gas powered, absorption, refrigerator/ freezers are the most common solution for off grid refrigeration.
		The average gas refrigerator is 8 cubic ft. - approximately 1.5 cu.
	www.renewables.net /solar_design_guide.html (12643 words)

	ARC Engineering Co., Ltd. - Low Static Duct
		then refluxed with the gas flame to distil off the ammonia which is recycled to the cool chamber.
		refrigerator where it mixes with the hydrogen gas, absorbing heat and cooling the refrigerator.
		While most refrigerator service should be accomplished by a qualified technician, the RV owner can help care for the refrigerator by taking some preventive measures.
	www.arcaircon.com /aircon/faq.html (1660 words)

	Refrigerators — Dometic USA
		When the first absorption refrigerators hit the road over 50 years ago, they carried the Dometic name.
		That's because Dometic refrigerators use the most advanced gas absorption technology--an innovation we invented decades ago.
		Our refrigerators are designed in the latest styles--with many of the features and quality materials you'd only expect in expensive residential units.
	www.dometicusa.com /refrigerators.php (123 words)

	EXPO21XX - Norcold
		A 21st-century company, Norcold is proud of its rich 40-year historyfrom humble beginnings, through periods of rapid growth, to today's position of industry leadership.
		Norcold was founded Oct. 21, 1959 in California to manufacture and sell specialty refrigerators to the then-small RV and Marine industries.
		In early 1963, the company was acquired by the Stolle Corporation, an Alcoa Company, and greatly expanded its refrigerator lines.
	www.expo21xx.com /popup/5557.htm (261 words)

	Electrolux Frequently Asked Questions
		The efficiency of the refrigerator while operating in the gas mode is dependent upon the correct burner flame.
		In many cases the refrigerator has been plonked into a cavity with what would appear to be little thought as to the processes it has to cope with.
		It is also important to ensure that the refrigerator door has not been warped from an accident and that the door seals are doing the job for which they were intended.
	www.aroundoz.com /a_clinic_archive/refrigeration/electrolux_faq.htm (2034 words)

	Original Dometic Refrigerator
		gas absorption refrigerators, I had never actually seen or worked on one until I got my Airstream.
		Reading up on RV operation in general, I knew the unit was capable of running on either electricity or gas, and that it took some time for cooling to actually occur.
		If you are reading this looking for technical insight, I will mention that gas absorption refrigerators run on a duty cycle in that the device is either ON or OFF.
	www.knology.net /~tcwilliams/Refrigerator.htm (488 words)

	WAECO mobile solutions - Absorption cooling
		Gas operation in a remote fjord, convenient 230-volt hook-up at the campsite, power supply from the cigarette lighter socket in cars or motorhomes – anything is possible!
		The ammonia gas then enters the absorber where it is reabsorbed in a weak solution of ammonia.
		They provide a generous capacity of 40 or 55 litres respectively, for snacks and drinks which can be cooled with either gas or electricity (12 volts DC or 230 volts AC.) While you are on the road in your car or motorhome, the energy comes from the vehicle battery via the cigarette lighter.
	www.waeco.com /en/absorption_coolers.php (547 words)

	CARAVAN REFIGERATION SERVICE
		The refrigerator is designed to operate efficiently on both gas and AC electric.
		A DC fan may help improve refrigerator performance when the refrigerator is not installed in accordance with installation requirements or when operating the refrigerator in high ambient temperatures.
		An ammonia odor detected inside the refrigerator cabinet or at the rear of the refrigerator indicates the cooling unit has developed a leak and requires replacement by your dealer or an authorized service center.
	www.caravanrefrigeration.com.au /f.a.q..html (546 words)

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