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We manufacture Vapor Absorption Refrigerator with advanced working and easy operational features. These are self contained Refrigerators working on absorption technology. In the absence of a compressor or pump, the circulation takes place by density difference. The Vapor Absorption Refrigerator absorbs the vapor emitted in the industries and laboratories, and prevents the heating of the place. Attributes Consumes less electricityDoes effective coolingLong service lifeLow maintenance How It Operates? The system is pre-charged with three fluids namely water, ammonia and hydrogen. Hydrogen is used as an �inert gas� and does not undergo any phase change and heat transfer processes. Its purpose is to keep the pressure of the system constantIt uses an electrically operated generator, where, the ammonia vapors dissolved in water are separated and pure ammonia vapors enter the condenserIn the condenser, the high pressure vapors reject its latent heat to the surroundings and get liquefiedThe liquid ammonia expands through expansion device where its pressure and temperature is reduced and cold low pressure vapor enters the evaporator where it absorbs heat from the space to be cooled and then vaporized ammonia absorbs in waterThis strong solution then enters the generator and the cycle repeats List of Experiments To study construction and working of a vapour absorption refrigeratorTo evaluate performance of the refrigerator by calculating the C.O.P of the system Principle of Operation Electrolux principle works on 3-fluid system. There is solution circulation pump. Total pressure is the same throughout the system. The third fluid remains mainly in the evaporator thus reducing partial pressure of refrigerant to enable it to evaporate at low pressure and hence low temperature. The schematic diagram of the Electrolux refrigerator working on NH3-H2O system with H2 as the third fluid is shown in figure. Liquid NH3 evaporates in the evaporator in the pressure of H2. Hydrogen is chosen as it is non �corrosive and insoluble in water. A thermosyphon bubble pump is used to lift the weak aqua from the generator to the separator. The discharge tube from the evaporator the generator is extended down below the liquid level in the generator. The bubbles rise and carry slugs of weak NH3-H2O solution into the separator. Two U-bends are provided as vapour- locks to prevent H2 from getting into the high side or solution circuit. Partial pressure of H2 provides the pressure difference of NH3 between the condenser and evaporator. Accordingly, we have: In condenser pure NH3 vapour pressure = Total pressureIn evaporator NH3 vapour pressure = Total pressure - partial pressure H2 For example, Consider the condenser temperature at 50 C and evaporator temperature as -15 C The corresponding vapour pressures of NH3 are : Condenser, Pk = 20.33barEvaporator outlet Po2 = 2.6barThe approximate pressures in various parts of the system, then will be as given in the table. SectionNH3H2OH2TotalCondenser20.330020.33Evaporator inlet1.516018.81420.33Evaporator outlet2.36017.9720.33Generator top15.544.79020.33 It has been assumed that vapours leaving generator top are in equilibrium with entering rich solution at 40 C, at which temperature saturation pressure of NH3 is 15.45bar. It has also been assumed that the temperature at evaporator inlet is -25 C at which temperature saturation pressure of NH3 is 1.516 bar. Technical Specifications Sub TitleParameterModelNAEVM-01Gross Volume41 LitersRefrigerantWater, Ammonia, HydrogenGeneratorElectrically HeatedCondenserNatural Convection TypeEvaporatorNatural Convection TypeMaterial of ConstructionM.S.Supply230 Volts, 50 HZ, 1 PHEnergy Consumption1.07 KWH Per 24 HrsEnergymeterProvidedTemperature IndicatorDigital Indicator at the Salient Points

We are supported by a well-structured warehousing facility wherein we keep a large stock of products. This unit facilitates us to meet urgent and massive requirements of the customers. As a quality-conscious firm, we make sure that the offered lot is sternly packed using the best quality packaging material. However, we source the packaging material from the genuine vendors. Stainless Steel Kitchen Freezer has a large storing space with multiple compartments, sturdy handles, and a shock-proof body.   

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