THERMODYNAMICSFigure P9.290 shows two Brayton cycles, labeled A and B, each having the same turbine inlet temperature and the same mass flow rate.a. The cycle having the greater net power output isb. The cycle having the greater thermal efficiency isCycle A: 1-2-3'-4'-1Turbine inlet33 temperature2'Cycle B: 1-2-3–4–1FIGURE P9.29C

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Answered: THERMODYNAMICS Figure P9.29C shows two…

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 enters the compressor of an ideal air-standard Brayton cycle at 110 kPa, 289 K, with a volumetric flow rate of 5 m3/s. The compressor pressure ratio is 12:1. The turbine inlet temperature is 1567 K. Take the gas constant as 289 J/kg.K and Specific heat at constant pressure and constant volume for air as 1.004 kJ/kg K and 0.708 kJ/kg K respectively. Calculate the net power developed to two decimal places and include the correct SI unit symbol.
For a Rankine cycle, increasing maximum temperature while holding all other parameters constant will allow an engineer to make the following statements Group of answer choices Quality at the turbine exit will decrease increasing liquid water content and causing turbine erosion. Quality at the turbine exit will increase and improve turbine durability. Increasing maximum temperature increases the average temperarture at which heat is added and will increase thermal efficiency Increasing maximum tempearture will decrease required mass flow rate for a specified power output.
Consider a cold air-standard Diesel cycle. Operating data at principal states in the cycle are given in the table below. The states are numbered as in Fig. 9.5 with p1 = 100 kPa, T1 = 340 K, and T3 = 4850.3 K, r = 15 and rc = 2. For n = 1.3, cv = 0.718 kJ/(kg-K), and cp = 1.005 kJ/(kg-K), a.) determine T2 in deg-C. b.) determine p2 in bar. c.) T4 in deg-C. d.) the mean effective pressure in kPa, for the modified cycle. e.) the heat transfer during heat addition process per unit mass in kJ/kg.
Consider a cold air-standard Diesel cycle. Operating data at principal states in the cycle are given in the table below. The states are numbered as in Fig. 9.5 with p1 = 100 kPa, T1 = 340 K, and T3 = 4850.3 K, r = 15 and rc = 2. For n = 1.3, cv = 0.718 kJ/(kg-K), and cp = 1.005 kJ/(kg-K), determine p2 in bar. determine T4 in deg-C. determine T2 in deg-C. determine the heat transfer during heat addition process per unit mass in kJ/kg.
Quantitatively compare the Carnot Rankine cycle of (figure 1) with the ideal Rankine cycle (figure 2). – Calculate the efficiency for the two cycles – Calculate the work per unit mass (kJ/kg) for the two cycles (Woutput = W34 – W12); – Compare the efficiencies and work done by the two cycles
Consider a cold air-standard Diesel cycle. Operating data at principal states in the cycle are given in the table below. The states are numbered as in Fig. 9.5 with p1 = 100 kPa, T1 = 340 K, and T3 = 4850.3 K, r = 12 and rc = 2. For n = 1.3, cv = 0.718 kJ/(kg-K), and cp = 1.005 kJ/(kg-K), determine T4 in K.
10. The initial design of an IFR turbine is to be based upon Whitfield’s procedure for optimum efficiency. The turbine is to be supplied with 2.2 kg/s of air, a stagnation pressure of 250 kPa, a stagnation temperature of 800°C, and have an output power of 450 kW. At turbine exit the static pressure is 105 kPA. Assuming for air that γ ¼ 1.33 and R ¼ 287 J/kg K, determine the valueof Whitfield’s power ratio, S, and the total-to-static efficiency of the turbine.
Consider a cold air-standard Diesel cycle. Operating data at principal states in the cycle are given in the table below. The states are numbered as in Fig. 9.5 with p1 = 100 kPa, T1 = 340 K, and T3 = 4850.3 K, r = 12 and rc = 2. For n = 1.3, cv = 0.718 kJ/(kg-K), and cp = 1.005 kJ/(kg-K), determine p2 in kPa.
Problem 9.27 Consider a cold air-standard Diesel cycle. Operating data at principal states in the cycle are given in the table below. The states are numbered as in Fig. 9.5. For k = 1.4, cv = 0.172 Btu/(lb R), and cp = 0.240 Btu/(lb R), (a) determine the net heat transfer per unit mass in Btu/lb. (b) Determine the net work per unit mass in Btu/lb. (c) Determine the cycle thermal efficiency (%)
Air enters the compressor of a cold air-standard Brayton cycle with regeneration at 90 kPa, 293 K, with a mass flow rate of 6 kg/s. The compressor pressure ratio is 10, and the turbine inlet temperature is 1300 K. The turbine and the compressor each have isentropic efficiencies of 85% and the regenerator effectiveness is 85%. Assume constant specific heats, take k = 1.4 and CP = 1.005 kJ/kgK. 3.2.1 Represent the cycle on a T – s diagram. Calculate: 3.2.2 the thermal efficiency of the cycle, 3.2.3 the back work ratio, and 3.2.4 the net power developed, in kW.
At the beginning of compression in an air-standard Diesel cycle, p1 = 96 kPa, V1 = 0.016 m3, and T1 = 290 K. The compression ratio is 15 and the maximum cycle temperature is 1290 K. Determine (a) the mass ofair, in kg. (b) the heat addition and heat rejection per cycle, each in kJ. (c) the net work, in kJ, and d) the thermal efficiency. (e) Solve the problem on a cold air-standard basis with constant specific heats.
Rannkin cycle 1_The value of enthalpy at point 1 is ( h1 =?) 2_ value of enthalpy at point 2 is ( h2 =?) 3_ value of enthalpy at point 3 is ( h3 =?) 4_value of enthalpy at point 4 is ( h4 =? 5_ value of steam mass flow rate in kg/s is 6_rate of heat supplied7_ power developed by Turbine (WT) in kW is : 8_ Thermal efficiency of Rankine cycle is:

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