Example 1.1An axial flow air compressor is designed to provide an overall total-to-total pressure ratio of 8 to 1. At inlet andoutlet the stagnation temperatures are 300 K and 586.4 K, respectively.Determine the overall total-to-total efficiency and the polytropic efficiency for the compressor. Assume that yfor air is 1.4.

Given data: r=8k=1.4T02=586.4 KT01=300 K Need to determine the overall and polytrophic efficiency.

Answered: Example 1.1 An axial flow air…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Air at a 800 kPa and 1300 K enters a turbine which has an isentropic efficiency of 90% with a mass ﬂow rate 6 kg/s. The outlet pressure is 100 kPa and assume that speciﬁc heats vary with temperature. 1. What is the outlet temperature in K? Report your answer to one decimal place using rounding. 2. (image)
Air enters the compressor of gas turbine at a pressure of (1) bar and temperature of (29)°C and leaves at a pressure of (5.5) bar. Find: (a) the temperature T: (b) compressor work for (2) kg of air (c) efficiency of cycle. Take 7-1.4, cp = 1.004 kJ/kg K
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Air enters the compressor of an ideal air-standard Brayton cycle at 100 kPa, 314 K, with a volumetric flow rate of 5 m3/s. The compressor pressure ratio is 9:1. The turbine inlet temperature is 1400 K. Take Specific heat at constant pressure and constant volume for air as 1.006 kJ/kg K and 0.717 kJ/kg K respectively. Calculate the compressor exit absolute temperature to one decimal place and place the correct unit. Use the cold air-standard assumption.
REFERENCE: FROM BOOK - ENGINEERING THERMOFLUIDS, M. MASSOUD
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A four-stage single-acting air compressor running in an atmospheric at 87 kPa and 15°C has a F.A.D of 2.83 m³/min. The section pressure and temperature are 80 kPa and 32 °C respectively, the delivery pressure is to be 7 MPa. The temperature at the start of compression in each stage is 32 °C, take n=1.3 for all stages. calculate: 1. The intermidiate pressure ratio 2. The intermidiate pressure at first, second and third stages in kPa
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