2 (3) Complete the following table and say whether the operation is reversible,irreversible, possible or impossibleT1600K700K1500KT2300K300K300K450KQ1+1000J+1050J+1400J+500JQ2+600J+150JW+500J+700J+800J+650JPossible/impossibleRev/Irrevir

Answered: Image /qna-images/answer/2c78281d-d897-4b73-820e-7305686a9309.jpg

Answered: (3) Complete the following table and…

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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A closed system undergoes a cycle consisting of three process 1-2, 2-3 and 3-1. Given that Q12 = 30kJ, Q23 = 10 kJ, 1w2 = 5 kJ, 3w2 = 5 kJ and DE31 = 15 kJ, Evaluate Q31, w23, DE12 and DE23.
Steam undergoes a regenerative cycle at: p1=5.6MPa t1=450°C p2=4MPa P3=3MPa p4=2MPa p5=1 MPa p6=0.5 MPa Calculate the efficiency of the cycle and engine and the heat rejected.
Brayton cicle Based on a gas turbine with superheat and intercooling, determine: 1) The thermal efficiency (ƞterm), in %. Use the expression ƞterm= 1 –(qL/ qH)2) How does gas turbine intercooling influence thermal efficiency?3) How and why? It is said that the gas turbine cycle with intercooling, reheating and regeneration is close to the Ericsson cycle.
2. A power cycle receives energy QH by heat transfer from a hot reservoir at TH = 1200 R and rejects energy QC by heat transfer to a cold reservoir at TC = 400 R. For each of the following cases, determine whether the cycle operates reversibly, operates irreversibly, or is impossible. (a) QH = 900 Btu, Wcycle = 450 Btu (b) QH = 900 Btu, QC = 300 Btu (c) Wcycle = 600 Btu, QC = 400 Btu (d) Eff. = 70%
Suppose that a new gasoline engine has been invented which can operate at the maximumthermodynamic efficiency (rather than the 25% or so which characterize most realisticengines). The burned fuel reaches about 2100 degrees C inside the engine and a 50 L gas tank has about2 GJ of fuel energy. If the engine must supply 30 hp to keep the car at a steady speed on the highway, how long will a tank of gas last?
Based on a gas turbine with superheat and intercooling, determine: 1) The thermal efficiency (ƞterm), in %. Use the expression ƞterm= 1 –(qL/ qH)2) How does gas turbine intercooling influence thermal efficiency?3) How and why? It is said that the gas turbine cycle with intercooling, reheating and regeneration is close to the Ericsson cycle.
Determine the Efficiency, in %, of a simple rankine cycle. Use: 8 MPa and 480 C (Table 3. Vapor) h1 = 3348.4 kJ/kg s1 = 6.6586 kJ/kg – K 2 MPa (Table 3. Vapor; note: s1 = s2) h2 = 2963.145 kJ/kg 2 MPa and 460 C (Table 3. Vapor; note: s3 = s4) h3 = 3379.5 kJ/kg s3 = 7.3147 kJ/kg – K 60C (Table 1. Saturation Temperatures) P5 = 0.019940 MPa = 19.94 kPa hf = 251.13 kJ/kg = h5 hfg = 2358.5 kJ/kg sf = 0.8312 kJ/kg – K sfg = 7.0784 kJ/kg – K vf = 0.0010172 m3/kg = v5 Solving for h4 s3 = s4 = sf + xsfg 7.3147 kJ/kg – K = 0.8312 kJ/kg – K + x (7.0784 kJ/kg – K) x = 0.9159555832 h4 = hf + x(hfg) h4 = 251.13 kJ/kg + 0.9159555832 (2358.5 kJ/kg) h4 = 2411.411243 kJ/kg Solving for h6 h6 = v5 (P6 – P5) + h5 h6 = 0.0010172 m3/kg (8000 kN/m2 – 19.94 kN/m2) + 251.13 kJ/kg h6 = 8.117317032 kJ/kg + 251.13 kJ/kg h6 = 259.247317 kJ/kg
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:
Please Do it fast in 30minutes Please provide clear solution of this question. According to Brayton cycle with regeneration and under cold air assumption, which of the following T1\T3 values gives the highest thermal efficiency:- a) T1\T3=0.35 b) T1\T3= 0.4 c) T1\T3=0.3 d) None of the options
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A turboshaft engine comprising a gas generator and a free power turbine is selected to provide propulsive power for a helicopter. The helicopter is hovering in ISA conditions at an altitude of 4100 feet. The following data applies to this engine at this static max power operating point. Intake mass flow: 8.9 kg/s Compressor pressure ratio: 24.5 Compressor isentropic efficiency: 88% Mechanical efficiency: (HP & PT shaft) 99% Combustion chamber pressure loss Combustion chamber inlet pressure 4% Combustion efficiency 98.8% Combustion chamber exit temperature: 1585K Gas generator turbine isentropic efficiency: 92% Power turbine isentropic efficiency: 90% The effects of the intake and exhaust ducts may be ignored. It may be assumed that for: Air: Cp = 1.005 kJ/kg • K, y = 1.4, R = 0.287 kJ/kg • K Combustion gases: Cp = 1.148kJ/kg • K, y = 1.333, R = 0.287 kJ/kg • K A 6% direct bleed of air from the exit of the compressor is…
A turboshaft engine comprising a gas generator and a free power turbine is selected to provide propulsive power for a helicopter. The helicopter is hovering in ISA conditions at an altitude of 4100 feet. The following data applies to this engine at this static max power operating point. Intake mass flow: 8.9 kg/s Compressor pressure ratio: 24.5 Compressor isentropic efficiency: 88% Mechanical efficiency: (HP & PT shaft) 99% Combustion chamber pressure loss Combustion chamber inlet pressure 4% Combustion efficiency 98.8% Combustion chamber exit temperature: 1585K Gas generator turbine isentropic efficiency: 92% Power turbine isentropic efficiency: 90% The effects of the intake and exhaust ducts may be ignored. It may be assumed that for: Air: Cp = 1.005 kJ/kg • K, y = 1.4, R = 0.287 kJ/kg • K Combustion gases: Cp = 1.148kJ/kg • K, y = 1.333, R = 0.287 kJ/kg • K A 6% direct bleed of air from the exit of the compressor is…

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(3) Complete the following table and say whether the operation is reversible, irreversible, possible or impossible T1 600K 700K 1500K T2 300K 300K 300K 450K Q1 +1000J +1050J +1400J +500J Q2 +600J +150J W +500J +700J +800J +650J Possible/impossible Rev/Irrev ir