ygotins lo6.69) By injecting liquid water into superheated steam. thedesuperheater shown in Fig. P6.69 has a saturated vaporstream at its exit. Steady-state operating data are providedin the accompanying table. Stray heat transfer and all kineticneand potential energy effects are negligible. (a) Locate statesto 1, 2, and 3 on a sketch of the T-s diagram. (b) Determinethe rate of entropy production within the de-superheater,K.Modelthein kW/K.ideal asState p(MPa) T°C)) v × 10³(m³/kg) u(kJ/kg) h(kJ/kg) s(kJ/kg · K)1381.0065 X 10-3166.5168.30.56581B 0.1308320sat. vap.Y2807.9 3069.56.845231.51.1592519.7 2693.6 7.2233Desuperheaterbol Liquidबेे कत60°C. Detheetniwater3.SaturatedfosvaporP6.4recomOlo lguons 2Superheated-vaporhonorm2 = 0.03 kg/smotava bogisins odt 1ol,nW ni

given data; mass enter at superheated vpor(m2)=0.03kg/sentropy at superheated vapor at pressure…

Answered: ygotins lo 6.69) By injecting liquid…

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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Where necessary, assume air as an ideal gas and consider R = 287 J/(kg.K), Cp = 1005 J/(kg.K), Cv = 718 J/(kg.K). a) A nozzle is a device that is used to increase the velocity of a fluid by varying the cross-sectional area. At the last section of a jet engine (Fig Q1.a, section 5), air with a mass flow rate of 50 kg/s at a pressure of 500 kPa and a temperature of 600 K enters a nozzle with an inlet cross-sectional area of 5 m2. The exit area of the nozzle is 20% of its inlet area. The air leaves the nozzle at a velocity of 300 m/s. The nozzle is not well-insulated and during this process, 5 kJ/kg heat is lost.Figure Q1.a: Schematic of a Jet engine.(iii) Calculate the density of the air as it leaves the nozzle.
Where necessary, assume air as an ideal gas and consider R = 287 J/(kg.K), Cp = 1005 J/(kg.K), Cv = 718 J/(kg.K). a) A nozzle is a device that is used to increase the velocity of a fluid by varying the cross-sectional area. At the last section of a jet engine (Fig Q1.a, section 5), air with a mass flow rate of 50 kg/s at a pressure of 500 kPa and a temperature of 600 K enters a nozzle with an inlet cross-sectional area of 5 m2. The exit area of the nozzle is 20% of its inlet area. The air leaves the nozzle at a velocity of 300 m/s. The nozzle is not well-insulated and during this process, 5 kJ/kg heat is lost. Figure Q1.a: Schematic of a Jet engine.(ii) Determine the density and velocity of the air entering thenozzle.
Where necessary, assume air as an ideal gas and consider R = 287 J/(kg.K), Cp = 1005 J/(kg.K), Cv = 718 J/(kg.K). a) A nozzle is a device that is used to increase the velocity of a fluid by varying the cross-sectional area. At the last section of a jet engine (Fig Q1.a, section 5), air with a mass flow rate of 50 kg/s at a pressure of 500 kPa and a temperature of 600 K enters a nozzle with an inlet cross-sectional area of 5 m2. The exit area of the nozzle is 20% of its inlet area. The air leaves the nozzle at a velocity of 300 m/s. The nozzle is not well-insulated and during this process, 5 kJ/kg heat is lost.Figure Q1.a: Schematic of a Jet engine. (i) In analysing this nozzle using the 1st law of thermodynamics, the change in which type of energy is negligible?
Isopiestic process: While the pressure remains constant at 689.5 KPa the volume of a system of airchanges from 0.567 m 3 to 0.283 m 3 . What are a) change of internal energyb) change of enthalpy, c) heat, d) change of entropy, e) If the process is non flowand internally reversible, what is the work?
Where necessary, assume air as an ideal gas and consider R = 287J/(kg.K), Cp = 1005 J/(kg.K), Cv = 718 J/(kg.K). A nozzle is a device that is used to increase the velocity of a fluid by varying the cross-sectional area. At the last section of a jet engine (Fig Q1.a, section 5), air with a mass flow rate of 50 kg/s at a pressure of 500 kPa and a temperature of 600 K enters a nozzle with an inlet cross-sectional area of 5 m2. The exit area of the nozzle is 20% of its inlet area. The air leaves the nozzle at a velocity of 300 m/s. The nozzle is not well-insulated and duringthis process, 5 kJ/kg heat is lost. (i) In analysing this nozzle using the 1st law of thermodynamics,the change in which type of energy is negligible? (ii) Determine the density and velocity of the air entering thenozzle. (iii) Calculate the density of the air as it leaves the nozzle.
Compress 6 kg/s of CO2 gas polytropically (pV1.2 = C) from p1 = 103.4 kPa, t1 = 50°C to t2 = 227°C. Assuming ideal gas action, find p2, W, Q, ΔS (a) as nonflow, (b) as a steadyflow process where ΔP=0 and ΔK=0.
Oxygen at the rate of 3 lb/min undergoes a reversible isobaric process during which its entropy changes -0.35 Btu/lb-°R; V1=17.75 ft3and t1= 400 oF . For both nonflow and steady flow (ΔP = 0 , ΔK = 0 ) processes, compute (a) ΔU and ΔH , (b) W , (c) Q.
Can someone explaine this problem please? A closed system contains an ideal gas, which molecular weight is W = 63.47 kg/kmol, and its standard state entropy is S0 = 0. The system undergoes the following cycle: at state 1 the temperature is 295.15 K, the pressure is 95 kPa (absolute), and the entropy is 46.450 J/(kg/kmol). The gas is compressed polytropically at n = 1.46 until the specific volume is 10 times lower than that at state 1 ( state 2 ). Then 85651.7 J/kg of heat is added at constant specific volume ( state 3). After that heat is added at constant pressure until entropy is 333.333 J/(kg.K) (state 4). In the next process the system undergoes isentropic expansion (and reaches state 5 ). Finally there is a constant volume rejection of heat (until state 1). Determine a) the values of p, v, T and s, at each cycle point; b) the p-V and T-s diagrams of cycle; c) the heat added to the system; d) the heat rejected by the system; e) the cycle net work; f) the mean effective pressure; g)…
Reversible interactions reach 1.234 kg/s of 321 kJ / s with certain gases, but keepthe temperature constant at 29.67 ° C. For this gas, Cp = 2.232 and Cv = 1.713 kJ / kg.° K. P1 is 687 kPa. For both nonflow and steady flow (ΔP = 0, ΔK = 0) processes. Find(a) V1,V2, and, P2, (b) work (c) ΔS, ΔH
Where necessary, assume air as an ideal gas and consider R = 287J/(kg.K), Cp = 1005 J/(kg.K), Cv = 718 J/(kg.K). a) A nozzle is a device that is used to increase the velocity of a fluidby varying the cross-sectional area. At the last section of a jetengine, air with a mass flow rate of 50 kg/s ata pressure of 500 kPa and a temperature of 600 K enters a nozzlewith an inlet cross-sectional area of 5m2. The exit area of thenozzle is 20% of its inlet area. The air leaves the nozzle at avelocity of 300 m/s. The nozzle is not well-insulated and duringthis process, 5 kJ/kg heat is lost. (i) In analysing this nozzle using the 1st law of thermodynamics,the change in which type of energy is negligible? (ii) Determine the density and velocity of the air entering thenozzle.(iii) Calculate the density of the air as it leaves the nozzle.(iv) Determine the temperature of the air as it leaves the nozzle.(v) Calculate the pressure of the air as it leaves the nozzle.
A turbine is driven by a system that enters the turbine at the ff. conditions: 500 kg/h, 44 atm, 450 deg C, 60 m/s linear speed. The steam exits at a point five meters below the inlet stream of the turbine with the following conditions: atmospheric pressure, 360 m/s speed. 70,000 W of shaft work is delivered by the turbine while 104 kilocalories/h heat is lost. Why is expansion work 0 and why cannot the flow work be calculated?
Water is compressed adiabatically, but inefficiently, from p1 = 150 kPa and T1 = 160 ∘C to a pressureof p2 = 700 kPa. A throttle valve is connected to the outlet of the compressor and has a temperature reading atits outlet of T3 = 440 ∘C at atmospheric pressure (1 bar). If the compressor operates at steady state, stray heattransfer can be neglected, and the changes in kinetic and potential energy are negligible, determine the isentropicefficiency of the compressor, in percent.

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