
Elements Of Electromagnetics
7th Edition
ISBN: 9780190698614
Author: Sadiku, Matthew N. O.
Publisher: Oxford University Press
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Transcribed Image Text:Type: E
4. A reversed Brayton refrigeration cycle uses air as its working fluid in a closed loop. The air enters the
compressor at 100 kPa and -10°C, and enters the turbine at 1000 kPa and 30°C. The mass flow rate of
the air through the cycle is 1.5 kg/s. Determine the rate at which heat is removed from the cold space
and the coefficient of performance of the cycle if (a) the turbine and compressor are isentropic and (b)
the turbine and compressor both have isentropic efficiencies of 0.80. Assume that the specific heats of
the air are constant.
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- Hello, please solve this problem, Thank you very mucharrow_forwardRegenerative Cycle (Open Feedwater Heater): 4. Steam enters the turbine at 10 MPa and 550 °C with mass flow rate of 10 kg/s and is condensed in the condenser at a pressure of 10 KPa. Some Steam is extracted from the turbine at 0.8 MPa and enters in an open feedwater heater. Determine the amount of steam that is condensed in the condenser.5. 23 percent of the steam is extracted from the turbine. The enthalpy and pressure at point 6 is 3100 KJ/KG and 1.26 MPa respectively. Determine the enthalpy of point 2.6. A Steam exits the boiler at 15 MPa and 550 °C and the pressure at point 1 and point 3 is 12 KPa and 1.3 MPa respectively. Determine the Overall Pump work of the cycle if 18 % of the steam is extracted from the turbine.arrow_forwardA steam Rankine cycle operates with a condenser temperature of 30°C, and a boiler pressure of 15MPa. The turbine is divided into two stages, a high-pressure turbine, and a low pressure turbine. In between the turbine stages the steam is reheated by the boiler so that the inlet temperature to both turbine stages is the same. The exit pressure of the first turbine stage is 7MPa. The condenser inlet is a saturated vapor and the outlet a saturated liquid. What is the net work of the cycle? What is the thermal efficiency of the cycle?arrow_forward
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