* For Refrigeration Effect RE * Enthalpy Properties h1 = 348 h2 = 400 h3 = 260 h4 = 260 * For mass in the system Qs = m (h1 – h4) 65 kW = m (348 – 260) m=0.739 kg/s EVAPORATOR * Qe = 65 kw * Temperature at the evaporator is -31.56 0C * Specific volume is 0.528 m3/kg (from ph diagram) * Consider steel material for coil: Uo=90-120 Btuhrft2 0F ; use 105Btuhrft2 0F * Allowable velocity at the liquid line is 125 – 450 ft/min; use 287.5 ft/min
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Plate Heat Exchangers Sugar Industry A refined campaign to save energy Process Equipment Division GEA PHE Systems Concentrating on competence – for your benefit Within the GEA Process Equipment Division of the international GEA Group‚ GEA PHE Systems is responsible for plate heat exchanger technology. Strong individual companies: GEA Ecoflex‚ GEA ViEX‚ GEA WTT‚ GEA Ecobraze and GEA PHE Systems NA with production locations in Germany‚ Sweden‚ the USA‚ Canada and India produce gasketed‚ fully
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DUAL EVAPORATOR SYSTEM DUAL EVAPORATOR SYSTEM What is a “Dual Evaporator System” ? As far as we know there is no classic definition for dual evaporator system. The two evaporators may be connected in different ways with the capillary tube(s) and compressor. Aditional valves are required depending on the system assembly. The most used ones are the directional valve at the end of the condenser and /or a check valve at the end of the freezer compartment. In some systems there is no connection
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Journal of Food Engineering 73 (2006) 320–326 www.elsevier.com/locate/jfoodeng Determination and correlation of heat transfer coefficients in a falling film evaporator ´ J.S. Prost a‚ M.T. Gonzalez a b a‚b ‚ M.J. Urbicain a‚b‚* ´ ´ ´ Planta Piloto de Ingenierıa Quımica (PLAPIQUI)‚ Camino La Carrindanga Km 7‚ (8000) Bahıa Blanca‚ Argentina ´ ´ ´ Departamento de Ingenierıa Quımica‚ Universidad Nacional del Sur (UNS)‚ Alem 1253‚ (8000) Bahıa Blanca‚ Argentina Received 23 July 2004; accepted
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cabin while aircraft on the ground and as the temperature of the air is reduced the moisture condenses on the fin of the evaporator then water droplets blown from the evaporator by the air stream and are collected in a water trap and drained away. Vapour cycle cooling system works with 5 components that is compressor‚condenser‚receiver dryer‚ thermal expansion valve n evaporator. Usually receiver dryer will storage the refrigerant liquid normally high volatile chemical such as Freon will be store
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basic components of a refrigeration system‚ these are: Evaporator Compressor Condenser Expansion Valve Refrigerant; to conduct the heat from the product In order for the refrigeration cycle to operate successfully each component must be present within the refrigeration system. The Evaporator The purpose of the evaporator is to remove unwanted heat from the product‚ via the liquid refrigerant. The liquid refrigerant contained within the evaporator is boiling at a low-pressure. The level of this pressure
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to perform this analysis the temperatures at the inlet and outlet of the condenser and evaporator were measured for both the refrigerant and the water. The flow rate of the refrigerant through the system was measured and assumed to be constant throughout. The flow rate of the water was measured through the condenser and evaporator as well as the pressure of the refrigerant through the condenser and evaporator. The water was used to cool the compressor before entering the condenser and the inlet
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Technology‚ Stockholm invented a three fluid system that did not require a pump. A heating based bubble pump was used for circulation of strong and weak solutions and hydrogen was used as a non-condensable gas to reduce the partial pressure of NH3 in the evaporator. Geppert in 1899 gave this original idea but he was not successful since he was using air as non-condensable gas. Commercial production began in 1923 by the newly formed company AB Arctic‚ which was bought by Electrolux in 1925. In
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an isolated system never decreases due to isolated systems spontaneously evolve towards thermodynamics equilibrium. Air conditioners apply it during its function. Air conditioners are made up of three main components which are evaporator‚ condenser and compressor. Evaporator located inside used to transfer heat from the indoor atmosphere to the working fluid. Condenser located outdoor will transfer heat from the working fluid to atmosphere outside and lastly compressor do works on the working fluid
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Electrical Equipment/ Refrigeration & AC Refrigeration & AC Refrigeration & Air Conditioning 1 Training Agenda: Refrigeration & Air Conditioning Refrigeration & AC Introduction Type of refrigeration Assessment of refrigeration and AC Energy efficiency opportunities 2 Introduction Refrigeration & AC How does it work? High Temperature Reservoir Heat Rejected R Work Input Heat Absorbed Low Temperature Reservoir 3 Introduction How does it work? Refrigeration & AC Thermal energy moves
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