An absorption refrigerator is a refrigerator that uses a heat source to provide the energy needed to drive the cooling process. The principle can also be used to. Download Citation on ResearchGate | On Jul 30, , Saghar Mehdi and others published Design of Compressor less Solar Powered. design and fabricate a compressor less refrigerator system flywheel. A parametric model of the refrigerator is designed using 3D modeling software CATIA.

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Thermodynamic cycles Heat pumps Cooling technology Heating, ventilating, and air conditioning Gas technologies. The orifice or throttle valve creates a pressure drop between the high pressure condenser section and the low pressure evaporator section. In other projects Wikimedia Commons.

In the s, absorption refrigeration saw a renaissance due to the substantial demand for refrigerators for caravans travel trailers. The main difference between the two systems is the way the refrigerant is changed from a gas back into a liquid so that the cycle can repeat.

The principle can also be used to air-condition buildings using the waste heat from a gas turbine or water heater. In comparison, a compressor refrigerator uses a compressor, usually powered by either an electric or internal combustion motor, to increase the pressure on the gaseous refrigerant.

Architectural acoustics Refriggerator engineering Architectural recrigerator Building services engineering Building information modeling BIM Deep energy retrofit Duct leakage testing Environmental engineering Hydronic balancing Kitchen exhaust cleaning Mechanical engineering Mechanical, electrical, and plumbing Mold growth, assessment, and remediation Refrigerant reclamation Testing, adjusting, balancing.

Caloric theory Theory of heat Vis viva “living force” Mechanical equivalent of heat Motive power. Material properties Property databases Specific heat capacity. A simple absorption refrigeration system common in large commercial plants uses a solution of lithium bromide and lithium chloride salt and water. Humidity is removed from the cooled air with another spray of salt solution, providing the outlet of cool, dry air.


Entropy and time Entropy and life Brownian ratchet Maxwell’s demon Heat death paradox Loschmidt’s paradox Synergetics. History General Heat Entropy Gas laws. Water under low pressure is evaporated from the coils that are being chilled. Thermodynamics The classical Carnot heat engine. Classical Statistical Chemical Quantum thermodynamics. Refriberator lower pressure in the evaporator section allows the liquid refrigerant to evaporate, which absorbs heat from the refrigerator food compartment.

Another difference between the two types is the refrigerant used. The cooling cycle starts with liquid ammonia at room temperature entering the evaporator. Conjugate variables in italics Property diagrams Intensive and extensive properties.

Absorption refrigerator

The cycle is closed, with all hydrogen, water and ammonia collected and endlessly reused. In Baltzar von Platen and Carl Munterswhile they were still students at the Royal Institute of Technology in StockholmSwedenenhanced the principle with a 3-fluid configuration. Another variant, uses air, water, and a salt water solution. Conjugate variables in italics. An absorption refrigerator changes the gas back into a liquid using a method that needs only heat, and has no moving parts other than the refrigerant itself.

At the TED ConferenceAdam Grosser presented his research of a new, very small, “intermittent absorption” vaccine refrigeration unit for use in third world countries. Heating, ventilation and air conditioning. The water comprdssorless from the salt solution is re-condensed, and rerouted back to the evaporative cooler.

This page was last edited compressorlesss 26 Novemberat Ammonia evaporates, taking a small amount of heat from the liquid and lowering the liquid’s temperature. The condensed refrigerant, now at a temperature near to that of the external environment, then passes through an orifice or a throttle valve into the evaporator section. Free energy Free entropy. The pure ammonia compreessorless then enters the condenser. An absorption refrigerator is a refrigerator that uses a heat source e.

From Wikipedia, the free encyclopedia. The intake of warm, moist air is passed through a compredsorless solution of salt water. In this heat exchangerthe hot ammonia gas transfers its heat to the outside air, which is below the boiling point of the full-pressure ammonia, and therefore condenses.


Absorption refrigerator – Wikipedia

Equations Carnot’s theorem Clausius theorem Fundamental relation Ideal gas law Maxwell relations Onsager reciprocal relations Bridgman’s equations Table of thermodynamic equations. Commercial production began in by the newly formed company AB Arcticwhich was bought by Electrolux in The refrigerator uses three substances: Archived copy as title.

The presence of hydrogen lowers the partial pressure of the ammonia gas, thus lowering the evaporation rate of the liquid below the temperature of the refrigerator’s interior. By using this site, you agree to the Terms of Use and Privacy Policy. Without phase change hot air engines. Absorption refrigerators are a popular alternative to regular compressor refrigerators where electricity is unreliable, costly, or unavailable, where noise from the compressor is problematic, or where surplus heat is available e.

In both types, when this refrigerant evaporates boilsit takes some heat away with it, providing the cooling effect. Views Read Edit View history. Archived from the original PDF on Rferigerator condensed liquid ammonia flows down to be mixed with the hydrogen gas released from the absorption step, repeating the cycle.

The system is pressurized to the pressure where the boiling point of ammonia is higher than the temperature of the condenser coil the coil which transfers heat to the air outside the refrigerator, by being hotter than the outside air. Caloric theory Theory of heat. The spray lowers the humidity but does not significantly change the temperature. The classical Carnot heat engine. The now-vaporized refrigerant then goes back into the compressor to repeat the cycle.