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Unformatted text preview: 1 2 (7 points) Sketch the T s diagram for an ideal vaporcompression refrigeration cycle. Denote the exit of the evaporator 1, the entrance of the condenser 2, the exit of the condenser 3 and the entrance of the evaporator 4. Derive expressions (all per unit mass of refrigerant) for the heat transfer into the evaporator, the heat transfer out of the condenser and the power input into the compressor. Derive an expression for the coefcient of performance. What is the relation between h 3 and h 4 ? 2 3 (10 points) Steam is the working uid in an ideal Rankine cycle. Saturated vapor enters the turbine at 8 . 0 MPa and saturated liquid exits the condenser at 0 . 008 MPa. Determine for the cycle (a) the thermal efciency, (b) the mass ow rate of the steam, (c) the rate of heat transfer into the working uid as it passes through the boiler and from the condensing steam as it passes through the condenser. 3...
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This note was uploaded on 04/01/2009 for the course MAE mae 110a taught by Professor ? during the Fall '07 term at UCSD.
 Fall '07
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