Performance Analysis of a Refrigeration System Using Nano Fluid

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Performance Analysis of a Refrigeration System Using Nano Fluid ( performance-analysis-refrigeration-system-using-nano-fluid )

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462 T. Coumaressin & K. Palaniradja working fluid. To evaluate the heat transfer coefficients for different concentrations of Cuonano particles. 3. Basic Experimental Observation of a Refrigeration Process 3.1 Equipment Used Evaporator, Reciprocating Compressor, Condenser, Expansion valve – Capillary Tube, solenoid Valve, Refrigerant – R134a 3.2 Working The vapour – compression uses a circulating liquid refrigerant as the medium which absorbs and removes heat from the space to be cooled and subsequently rejects that heat elsewhere. Fig. 1 depicts a typical, single – stage vapour – compression system. All such systems have four components: a compressor, a condenser, a thermal expansion valve and an evaporator. Circulating refrigerant enters the compressor in the thermodynamic state known as a saturated vapor and is compressed to a higher pressure, resulting in a higher temperature as well. The hot vapour is routed through a condenser where it is cooled and condensed into a liquid by flowing through a coil or tubes with cool air flowing across the coil or tubes. Fig. 1: Experimental Setup of the refrigeration test rig The condensed liquid refrigerant, in the thermodynamic state known as a saturated liquid, is next routed through an expansion valve where it undergoes an abrupt reduction in pressure. That pressure reduction results in the adiabatic flash evaporation of a part of the liquid refrigerant. The cold mixture is then routed through the coil or tubes in the evaporator. A fan circulates the warm air in the enclosed space across the coil or tubes carrying the cold refrigerant liquid and vapour mixture. That warm air evaporates the liquid part of the cold refrigerant mixture. At the same time, the circulating air is cooled and thus lowers the temperature of the enclosed space to the desired temperature.

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