State234p (kPa)10012001200100T (K)300603.51450780.7h (kJ/kg)300.19610.651575.57800.78 An ideal air-standard regenerative Brayton cycle produces 10 MW ofpower. Operating data at principal states in the cycle are given inthe table below. The states are numbered as in Fig. 9.14. Sketch theT-s diagram and determinea. the mass flow rate of air, in kg/s.b. the rate of heat transfer, in kW, to the working fluid passingthrough the combustor.c. the thermal efficiency.RegeneratorwwwwwCompressorCombustorTurbinecycle

The mass flow rate, rate of heat transfer, and thermal efficiency. Given: The power produced is…

Answered: An ideal air-standard regenerative…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

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5.)(II) The idealized air-standard Diesel cycle is shown in Fig. 21.26. Air enters the combustion chamber in an intake stroke (not shown). It is adiabatically compressed from a to b. At b fuel enters the system and starts to burn, essentially at constant pressure. This process continues until point c, when the gas expands adiabatically to point d. This is the power stroke. In the exhaust stroke, the combustion prod- ucts cool at constant volume from d back to the initial point a. Show that the efficiency is 1 (Ta- Ta y Te Th e = 1. 1-4 - FIGURE 21.26 Problem 5 V
a.Draw a schematic diagram with labels of states of a substance; b.For uniformity purposes, assign STATE 1 at the inlet of a high-pressure turbine. The states must be arranged in a chronological order; c.Plot each cycle in a t-s diagram with the states consistent to the states assignment in the schematic diagram; d.Show a detailed solution. An ideal Rankine cycle with double reheat operates the boiler at 12MPa, the reheater at 5 MPa and 2.0 MPa, and the condenser at 0.01 MPa. The temperature at the boiler and reheater outlets are maintained at 400°C. a) Determine the total rate of heat transfer per unit mass in the reheaters, andb) the thermal efficiency of this cycle.
An ideal air-standard Brayton cycle operating at steady state produces 10 MVWof power. Operating data at principal states in the cycle are given in the table below. The states are numbered as in the figure below. State p(kPa) T (K) h (kJ/kg) 1 100 300 300 1000 574.1 579.7 3 1000 1800 2002 4 100 1034 1085
Q2/ A regenerative-reheat cycle has air entering at 1 bar, 300 K into compressor having intercooling in between the two stages of compression. Air leaving first stage of compression is cooled upto 290 K at 4 bar pressure in intercooler and subsequently compressed upto 8 bar. Compressed air leaving second stage compressor is passed through a regenerator having effectiveness of 0.80. Subsequent combustion chamber yields 1300 K at inlet to turbine having expansion upto 4 bar and then reheated upto 1300 K before being expanded upto 1 bar. Exhaust from turbine is passed through regenerator before discharged out of cycle. For the fuel having heating value of 42000 kJ/kg determine fuel-air ratio in each combustion chamber, total turbine work and thermal efficiency. Consider compression and expansion to be isentropic and air as working fluid throughout the cycle.
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. (A) 3380.02 B) 4431.27 (C) 2528.92 D) 3675.83
Thermodynamics Fill in the Blanks: 1) In a spark-ignition engine, a mixture of fuel and air is ignited by a(n) _____________ 2) In a cold air-standard analysis, the specific heats are assumed ___________ at their ambient temperature values. 3) Ericsson and Stirling cycles operating between thermal reservoirs at TH and Tc have thermal efficiencies equal to that of a _____________ cycle operating between the same thermal reservoirs.
In an ideal gas refrigeration cycle, helium enters the compressor at a temperature of 15 ̊C and a pressure of 100 kPa and leaves at a pressure of 300 kPa. The temperature of helium at the turbine inlet is 30 ̊C. Assuming that the isentropic efficiency of the compressor and turbine is 80%; Calculate a) the lowest and highest temperatures of the cycle, b) the efficiency coefficient of the cycle, c) the required helium flow rate for 5 kW cooling capacity
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 the heat transfer during heat addition process per unit mass in kJ/kg. A) 3865.1 B) 4104.58 C) 3838.71 (D) 4154.44
a.Draw a schematic diagram with labels of states of a substance; b.For uniformity purposes, assign STATE 1 at the inlet of a high-pressure turbine. The states must be arranged in a chronological order; c.Plot each cycle in a t-s diagram with the states consistent to the states assignment in the schematic diagram; d.Show a detailed solution. Consider a regenerative vapor power cycle with a single open feedwater heater. Steam enters the first turbine stage at 12MPa, 500 0C, and expands to 0.3MPa where some steam is extracted and fed to the feedwater heater. The remainder expands through the second-stage turbine and exits at the condenser pressure of 0.01 MPa. Saturated liquid at 0.3 MPa leaves the open feedwater heater. If the net power output of the cycle is 100 MW,and the turbine stages and pumps are isentropic, determine (a) the thermal efficiency, and(b) the mass flow rate of steam entering the first turbine, in kg/h.
At the beginning of the compression process of an air standard Otto cycle, p1 = 1 bar, T1 = 300 K. The maximum temperature in the cycle is 2250 K and the compression ratio is 9.8. The engine has 4 cylinders and an engine displacement of Vd = 2.1 L. Determine per cylinder: a) the volume per cylinder at state 1.b) the air mass per cycle.c) the heat addition per cycle, in kJ.d) the heat rejection per cycle, in kJ.e) the net work per cycle, in kJ.f) the thermal efficiency.g) the mean effective pressure, in bar.h) Develop a full exergy accounting per cycle, in kJ. Let T0 = 300 K, p0 = 1 bar.i) Devise and evaluate the exergetic efficiency for the cycle. Correct Answers for a, b, and c. v1= 0.585 L m = 0.000679 kg Qin = 0.942 KJPlease shows correct solutions. Thank you!
3. Air is used in an ideal Brayton cycle (shown in p-v and T-s diagram). The state conditions are given in the following Table. (a) The heat addition and heat rejection (b) The net power developed per unit mass flow rate (c) The thermal efficiency State T(°C) P(kPa) 1 20 100 3 1000 350 T 3 3 b a 2.
Assume a basic (non-regenerative) ideal Brayton cycle where air modeled as IG with variables specific heat. The gas-turbine engine has the following operational parameters: Inlet Air Temperature:537 R Inlet Air Pressure:14.696 psia Compressor Pressure Ratio (rp):6.0 Firing Temperature:2400 R Heat Recovery Steam Generator: Assume that the exhaust from the gas turbine engine is directed to a heat recovery steam generator (HRSG)to produce wet steam (i.e. saturated vapor) at a pressure of 600 psia. Liquid water is supplied to the HRSG at 100F and 600 psia. The exhaust gas from the gas-turbine engine leaves the HRSG at the saturation temperature of the wet steam. With these conditions determine: a) the exit temperature of the wet steam (F), b) the intensive steam production rate, lbm-steam/lbm-exhaust gas. Absorption Chiller CHP: Assume the process steam from the HRSG is now used to drive an absorption chiller with COP of 0.7, and that the mechanical power of the gas-turbine engine is used…

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