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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Ammonia evaporates, taking a small amount of heat from the liquid and lowering the liquid’s temperature. Classical Statistical Chemical Quantum thermodynamics.

Equations Carnot’s theorem Clausius theorem Fundamental relation Ideal gas law Maxwell relations Onsager reciprocal relations Bridgman’s equations Table of thermodynamic equations. Thermodynamic cycles Heat pumps Cooling technology Heating, ventilating, and air conditioning Gas technologies.

The classical Carnot heat engine.

Absorption refrigerator – Wikipedia

Refrigerstor company marketed refrigerators for recreational vehicles RVs under the Dometic brand. Retrieved from ” https: A single-pressure absorption refrigerator takes advantage of the fact that a liquid’s evaporation rate depends upon the partial pressure of the vapor above the liquid and goes down with lower partial pressure. Caloric theory Theory of heat Vis viva “living force” Mechanical equivalent of heat Motive power.

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. By using this site, you agree to the Terms of Commpressorless and Privacy Policy. Heat engines Heat pumps Thermal efficiency.


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 refrigreator the refrigerator, by being hotter than the outside air. It continues to evaporate, while the large enthalpy of vaporization heat flows from the warmer refrigerator interior to the cooler liquid ammonia and then to more ammonia gas.

In both types, when this refrigerant evaporates boilsit takes some heat away with it, providing the cooling effect. Free energy Free gefrigerator.

While having the same total pressure throughout the system, the refrigerator maintains a low partial pressure of the refrigerant therefore high evaporation rate in the part of the system that draws heat out of the low-temperature interior of the refrigerator, but maintains the refrigerant at high partial pressure therefore low evaporation rate in the part of the system that expels heat to the ambient-temperature air outside the refrigerator.

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.

The orifice or throttle valve creates a pressure drop between the high pressure condenser section and the low pressure evaporator section.

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. The volume of the evaporator is greater than the volume of the liquid, with the excess space occupied by a mixture of gaseous ammonia and hydrogen. Carnot’s theorem Clausius theorem Fundamental relation Ideal gas law. Archived copy as title.


The now-vaporized refrigerant then goes back into the compressor to repeat the cycle.

The spray lowers the humidity but does not significantly change the temperature. The water evaporated from the salt solution is re-condensed, and rerouted back to the evaporative cooler. History General Heat Entropy Gas laws. An absorption refrigerator is a refrigerator that uses a compreesorless source e.

Comppressorless 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. Without phase change hot air engines. Caloric theory Theory of heat. Commercial production began in by the newly formed company AB Arcticwhich was bought by Electrolux in Conjugate variables in italics Property diagrams Intensive and extensive properties.

Absorption refrigerator

In the s, absorption refrigeration saw a renaissance due to the substantial demand for refrigerators cmopressorless caravans travel trailers. Conjugate variables in italics.

A simple absorption refrigeration system common in large commercial plants uses a solution of lithium bromide and lithium chloride salt and water. Material properties Property databases Specific heat capacity.

Maxwell’s thermodynamic surface Entropy as energy dispersal.