
Automotive Technology
7th Edition
ISBN: 9781337794213
Author: ERJAVEC, Jack.
Publisher: Cengage,
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Chapter 19, Problem 1MC
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The correct answer is ~168 MPa, how was this found?
Air enters the compressor of a regenerative gas turbine engine at 310 K and 100 kPa, where it is compressed to 900 kPa and 650 K. The regenerator has an effectiveness of 75%, and the air enters the turbine at 1400 K. Assume variable specific heats for air.
For a turbine efficiency of 90 percent, determine the amount of heat transfer in the regenerator.
The amount of heat transfer in the regenerator is kJ/kg.
Air enters the compressor of a regenerative gas turbine engine at 310 K and 100 kPa, where it is compressed to 900 kPa and 650 K. The regenerator has an effectiveness of 79 percent, and the air enters the turbine at 1400 K. Assume constant specific heats for air at room temperature. The properties of air at room temperature are cp = 1.005 kJ/kg·K and k = 1.4.
For a turbine efficiency of 90 percent, determine the amount of heat transfer in the regenerator.
The amount of heat transfer in the regenerator is kJ/kg.
Chapter 19 Solutions
Automotive Technology
Ch. 19 - To protect electronic circuits, some voltage...Ch. 19 - What is the purpose of the diodes in the...Ch. 19 - How does a voltage regulator regulate the voltage...Ch. 19 - Describe the differences between an overrunning...Ch. 19 - What would happen to the output of an AC generator...Ch. 19 - Describe the basic difference between a DC motor...Ch. 19 - True or False? A faulty voltage regulator can only...Ch. 19 - True or False? A generator that is not producing...Ch. 19 - Prob. 1MCCh. 19 - What part of the AC generator is the rotating...
Ch. 19 - Which type of stator winding has two windings in...Ch. 19 - Slip rings and brushes. mount on the rotor shaft...Ch. 19 - The alternating current produced by the AC...Ch. 19 - Prob. 6MCCh. 19 - Prob. 7MCCh. 19 - Technician A says that the waveform produced by an...Ch. 19 - While discussing what is indicated by a vehicles...Ch. 19 - When checking the charging system on a late-model...Ch. 19 - Prob. 4ASRQCh. 19 - Technician A says generator output should be...Ch. 19 - Technician A says that many newer charging systems...Ch. 19 - While diagnosing rapid and severe belt wear after...Ch. 19 - Prob. 8ASRQCh. 19 - Prob. 9ASRQCh. 19 - Prob. 10ASRQ
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- How do you find these answers?arrow_forward250 mm 400 mm A B C E F 250 mm PROBLEM 1.52 Each of the two vertical links CF connecting the two horizontal members AD and EG has a 10 × 40-mm uniform rectangular cross section and is made of a steel with an ultimate strength in tension of 400 MPa, while each of the pins at C and F has a 20-mm diameter and are made of a steel with an ultimate strength in shear of 150 MPa. Determine the overall factor of safety for the links CF and the pins connecting them to the horizontal members. 24 kNarrow_forward50 mm 12 mm B O C OA 300 mm 450 mm E PROBLEM 1.51 Each of the steel links AB and CD is connected to a support and to member BCE by 25-mm-diameter steel pins acting in single shear. Knowing that the ultimate shearing stress is 210 MPa for the steel used in the pins and that the ultimate normal stress is 490 MPa for the steel used in the links, determine the allowable load P if an overall factor of safety of 3.0 is desired. (Note that the links are not reinforced around the pin holes.)arrow_forward
- 3. A 15% magnesium chloride solution is flowing through a 5-nom sch 40 commercial steel pipe at a rate of 325,000 lbm/h. The average temperature of the magnesium chloride solution as it flows through the pipe is 10°F. Determine the convective heat transfer coefficient inside the pipe.arrow_forward2. Jojoba oil is flowing through a ¾-nom stainless steel pipe at a flow rate of 1,850 lbm/h. After the velocity profile in the pipe is fully developed, the oil enters a heater, as shown in Figure P5.7. The length of the heater section is 5 ft. The properties of the jojoba oil at the average temperature in the heater section are given in Table P5.7. Determine the convective heat transfer coefficient inside the heater section of the pipe. ¾ nom stainless steel pipe Heater section L=5ft Fig. P5.7 TABLE P5.7 Thermophysical Properties of Jojoba Oil at the Average Temperature in the Heater P (lbm/ft³) 68.671 (Btu/lbm-R) 0.30339 μ (lbm/ft-s) 0.012095 k (Btu/h-ft-°F) 0.077424arrow_forward1. Water is flowing inside of a 3-std type K copper tube at a flow rate of 1.2 kg/s. The average temperature of the water is 50°C. Cold, dry air at a temperature of 5°C and atmospheric pressure flows outside of the tube in cross flow with a velocity of 85 m/s. Determine the UA product for this tube under clean conditions.arrow_forward
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