10. Figure shows a power cycle executed by a gas in a piston-cylinder assembly. For process 1-2, Uz - Uj = 15 kJ. For process 3-1, Qr= 10KJ. There areno changes in kinetic or potential ener gy. Deter mine (a) the work for each process, in kJ, (b) the heat transfer for processes 1-2 and 2-3, each in kJ, and (c) the thermal efficiency. 4. (kPa) 2 1 1 3 V (m)

10. Figure shows a power cycle executed by a gas in a piston-cylinder assembly. For process 1-2, Uz - Uj = 15 kJ. For process 3-1, Qr= 10KJ. There areno changes in kinetic or potential ener gy. Deter mine (a) the work for each process, in kJ, (b) the heat transfer for processes 1-2 and 2-3, each in kJ, and (c) the thermal efficiency. 4. (kPa) 2 1 1 3 V (m)

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

See similar textbooks

Similar questions

An automobile industry using piston cylinder arrangement for their operation it under goes a thermodynamic cycle which includes three processes with an initial state where pressure is 1.5 bar, volume is 2 m3 and internal energy equals to 480 kJ. The processes are as follows: 1)first stage to second stage: Compression with pV equals to constant to p2 is equals to 2 bar, U2 equals to 720 kJ 2)Second stage to third stage: work is equals to zero, and Q2-3 = - 150 kJ 3)Stage third to one: work is equals to 75 kJ. Neglecting kinetic energy and potential energy changes, find the heat transfer Q1-2 and Q3-1.
In a piston-cylinder assembly, there is initially a pressure of 300 kPa, a temperature of 150oC and a volume of 0.5 m3 of air. Until air doubles in volume with PVn=constant polytropic processexpands as much. For n =1, n = k and n = 1.6a. final pressure of the air,b. Moving border work,c. Calculate the heat transfer.(Note: take constant specific heat values at room temperature (at 300 K).)
For a power cycle operating as shown in Fig. 5, the energy transfer by heat into the cycle, Qa, is 500 MJ. What is the network developed, in MJ, if the cycle themal efficiency is 30%? What is the value of Qaut, in MJ? Hot body System Cold body Qout 330 M Q130 M 40 Oout550 MI Qu40 M
A system executes a cycle during which there are three heat transfer Q12 = 200 kJ, Q23 = - 25 kJ, Q31ı The work done during two of the processes are = - 160 kJ W2 = 15 kJ and W,3 = - 10 kJ %3D The work done during W3-1 is _kcal.
As shown in the figure below, a reversible power cycle receives energy QH by heat transfer from a hot reservoir at TH and rejects energy QC by heat transfer to a cold reservoir at TC. (a) If TH = 1600 K and TC = 400 K, what is the thermal efficiency?(b) If TH = 500°C, TC = 20°C, and Wcycle = 1000 kJ, what are QH and QC, each in kJ?(c) If η = 70% and TC = 40°F, what is TH, in °F?(d) If η = 40% and TH = 1027°C, what is TC, in °C?
The figure below shows a thermodynamic cycle undergone by a certain system. Find the mean effective pressure in N/m² ,
A power cycle operating between two reservoirs receive energy Qh by heat transfer to a cold reservoirs at Th=2000k and rejects energy Qc by heat transfer to a cold reservoir at Tc=400k.For each of the following cases determine whether the cycle operates reversible, irreversible or impossible. SHOW all calculation procedure.( Hint:find maximum thermal efficiency and compare with each system thermal efficiency, system Thermal efficiency =wcycle/Qin) A)find maximum Thermal efficiency (%) of the system. B)Qh=50kj, Wcycle=850kj C)Qh=2000kj, Wcycle=400kj D)Wcycle=150kj, Qc=700kj
2. Two and one-half pounds of air actuate a cycle composed of the following processes: polytropic compression 1-2, with n=1.5; constant pressure 2-3; constant volume 3-1. The known data are: p1 = 20psia, t1 = 100degF, Qr = -1682 Btu. Determine a) T2 and T3, b) the work of the cycle using the pV plane, in Btu; c) Qa, d) the thermal efficiency and e) pm.
5. A 2000-KW diesel engine unit uses 1 US barrel (bbl) of oil per 525 kW-h produced. Oil is 25°API. Efficiency of generator is 93% and mechanical efficiency is 80%. The thermal efficiency based on indicated power is %.
1. Make a control volume around the whole power plant in Fig. 1.1 and list the flows of mass and energy in or out and any storage of energy. Make sure you know what is inside and what is outside your chosen control volume. FIGURE 1.1 A power tation in Febjeg. Denmark. Courtesy of Dang Enargy AS, Denmarik
in a steam power cycle, steam enters the turbine at 20 bar with the following different conditions and leaves at 0.5 bar. calculate Carnot efficincy, Rankine efficincy, consdier heat flow in KW assuming mass flow rate of steam as 12 kg/s and steam rate for each case considering the pump work. i) Dry and saturated ii) wet with 0.95 dryness iii) superheat at 450 degrees C solve the problem by Moiler digram for all the cases
3/ A piston-cylinder contain 5 kg of steam assembly undergoes an expansion from state 1, where the specific internal energy is u= 2709.9 kJ/kg, to state 2, where uz = 2659.6 kJ/kg. During the process, there is heat transfer to the steam with a magnitude of 80 kJ. Also, a paddle wheel transfers energy to the steam by work in the amount of 18.5 kJ. There is no significant change in the kinetic or potential energy of the steam. Determine the energy transfer by work from the steam to the piston during the process, in kJ. Skg of eam