Chapter 8, Problem 39QAP

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.

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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.

The circuit shown in Fig. 14.98 has the impedance Z(s) = 1,000(s+1) (s+1+j50)(s+1 – j50) ' s=j@ Find: (a) the values of R, L, C, and G (b) the element values that will raise the resonant frequency by a factor of 103 by frequency scaling Z(s) Figure 14.98 For Prob. 14.81. R 7

Please solve this question step by step with dia gram

Chapter 14, Problem 57. Determine the center frequency and bandwidth of the bandpass filters in Fig. 14.88. 1 F ΙΩ ww V. (+ 1 F 10 V 1 H m (a) (b) ΙΩ ww ΙΩ 1HV Figure 14.88 For Prob. 14.57.

Chapter 14, Problem 43. Calculate the resonant frequency of each of the circuits in Fig. 14.82. C (a) Figure 14.82 For Prob. 14.43. (b) C L

Chapter 14, Problem 69. end Design the filter in Fig. 14.94 to meet the following requirements: (a) It must attenuate a signal at 2 kHz by 3 dB compared with its value at 10 MHz. (b) It must provide a steady-state output of v。 (t) input v, (t)=4sin(2 × 108t) V. = 10 sin(2x 108t+ 180°) V for an Rf ww R ww C 1+ Vs Figure 14.94 For Prob. 14.69.