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Engineering · Mechanical Engineering
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4. Using the following equation, show that for a given pressure rise a gas turbine compressor would require a much greater work input per unit of mass flow than would the pump of a vapor power plant. 5. The air entering a turbojet engine experiences a pressure increase as it flows through the diffuser and another pressure increase as it flows through the compressor. How are these pressure increases achieved? 6. How would the T-s diagram of Fig. 2.13 (refer to the lecture notes) appear if frictional effects for flow through the diffuser, compressor, turbine, and nozzle were considered? 7. Explain how a household refrigerator can be viewed as a heat pump that heats the kitchen. If you knevw the refrigerators coefficient of performance, could you calculate its coefficient of performance when viewed as a heat pump? 8. What components are contained in the outside unit of a residential heat pump? 9. When a regenerator is added to the ideal Brayton refrigeration cycle, as in Fig. 3.14 (refer to the lecture notes), does the coefficient of performance increase or decrease?
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