6. The following image shows Carnot cycle beginning from the point A and returns back to A.a) Using adiabatic expansion and isothermal expansion, prove that this cycle (1-4) has no netchange in entropy. (dS = 0)b) Prove that the efficiency of any machine isonly dependent on the temperature difference ofhot source and cold sink.work performed71-heat absorbed fro hot sourcec) In an ideal heat engine, the cold sink is at 5°C. If 250.0 kJ of heat is withdrawn from the hotsource and 200.0 kJ of work is generated, whatis the initial temperature of the hot source?Pressure pDAdiabat1 Isotherm AdiabatIsotherm3Volume, VB

given; (c)cold sink tem[perature(T2)=50c =278k heat addition in the engine…

Answered: 6. The following image shows Carnot…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

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Pls answer thank you! The following data were obtained during performance test with a simple open cycle gas turbine engine: compressor inlet temperature, 520*R: compressor isentropic discharge temperature, 672"R: actual compressor discharge temperature, 691"R: turbine inlet temperature, 1500 R: turbine isentropic discharge temperature. 1184"R: and turbine actual discharge temperature, 1216°R. For these conditions calculate the thermal efficiency in percent.
(4 blanks) An ice-making machine operates in a Carnot cycle. It takes heat from water at 0.o °C and rejects heat to a room at 24.0 °C. Suppose that 85.0 kg of water at 0.0 °C are converted to ice at 0.0 °C. How much energy (in Joules) must be supplied to the machine to achieve this task? Sol. Since the machine is a operating in a Carnot cycle, then, its efficiency is e = /TH| By virtue of first law, the work done to convert water to ice is given by W = Q = Thus, the total energy needed to convert 85 kg of water is ET = 687.5J
3. The working substance for a Carnot cycle is 8 Ib, of air. The volume at the beginning of isothermal expansion is 9 ftand the pressure is 300 psia. The ratio of expansion during the addition of heat is 2 and the temperature of the cold body is 90 °F. Find: a) Q, and Qr (BTU), b) V, and Ps, c) V, and P4, d) mean effective pressure (psia).
(4 blanks) An ice-making machine operates in a Carnot cycle. It takes heat from water at 0.0 °C and rejects heat to a room at 24.0 °C. Suppose that 85.0 kg of water at 0.0 °C are converted to ice at 0.0 °C. How much energy (in Joules) must be supplied to the machine to achieve this task? Sol. Since the machine is a operating in a Carnot cycle, then, its efficiency is = - |/TH| By virtue of first law, the work done to convert water to ice is given by W = Q = Thus, the total energy needed to convert 85 kg of water is ET = 687.5 J
(4 blanks) An ice-making machine operates in a Carnot cycle. It takes heat from water at 0.0 °C and rejects heat to a room at 24.0 °C. Suppose that 85.0 kg of water at 0.0 °C are converted to ice at 0.0 °C. How much energy (in Joules) must be supplied to the machine to achieve this task? Sol. Since the machine is a operating in a Carnot cycle, then, its efficiency is e = th |-| tc TH| By virtue of first law, the work done to convert water to ice is given by W = Q = ml Thus, the total energy needed to convert 85 kg of water is ET 687.5 J
Derive the formula of efficiency of the following: b. Diesel Cycle in terms of cutoff ratio rc, specific heat ratio k and compression r
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
In an absorption refrigerator, the energy driving the process is sllPplied not as work, but as heat from a gas flame. (Such refrigerators commonly use propane as fuel, and are used in locations where electricity is unavailable. *) Let us define the following symbols, all taken to be positive by definition: Qf = heat input from flame Qe = heat extracted from inside refrigerator Qr = waste heat expelled to room Tf = temperature of flame Te temperature inside refrigerator Tr = room temperature Use the second law of thermodynamics to derive an upper limit on the COP, in terms of the temperatures Tf, Te, and Tr alone.
In an absorption refrigerator, the energy driving the process is sllPplied not as work, but as heat from a gas flame. (Such refrigerators commonly use propane as fuel, and are used in locations where electricity is unavailable. *) Let us define the following symbols, all taken to be positive by definition: Qf = heat input from flame Qe = heat extracted from inside refrigerator Qr = waste heat expelled to room Tf = temperature of flame Te temperature inside refrigerator Tr = room temperature Explain why the "coefficient of performance" (COP) for an absorption refrigerator should be defined as Qc/Qf.
1. (#22pp61Dimgba) A 3600 rpm, 60,000 kW unit receives steam at 2.75 MPaa and 430 C with a back pressure of 0.005 MPaa. Engine efficiency is 78% and the combined mechanical and electrical efficiency is 95 %. Find: a) Rankine cycle ratio (RCR) b) Theoretical steam rate (TSR) c) Actual steam rate (SR) d) Steam flow e) Exhaust enthalpy
Thermodynamics review that I cannot solve! Would appreciate some or all done out A heat engine with a thermal efficiency of 45% rejects 1000 kJ/kg of heat to a low temperature sink. 1. How much heat does it receive (kJ/kg)? 2. How much work does it produce (kJ/kg)? 3. If the cycle operates between temperatures of 400°C and 50°C,what is the maximum amount of work that this cycle can produce (kJ/kg)? 4. A Carnot heat pump operates between 273 K and 313 K, determine its Coefficient of Performance.
As shown in the figure below, a reversible power cycle receives energy Qu by heat transfer from a hot reservoir at T and rejects energy Qe by heat transfer to a cold reservoir at Te. Part A Hot revervoir Boundary (a) If Tu-1600 K and Te-400 K, what is the thermal efficiency? (b) If TH-500°C, Tc -20°C, and Wyde -1800 kJ, what are Quand Qc. each in kJ? (c) If n= 60% and Tc 40°F, what is Tin "F? (d) If n=40% and TH=727°C, what is Tc, in °C? 11= Cold 20 Te If TH=1600 K and Tc-400 K, what is the thermal efficiency? Activate Go to Settin

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