Entropy Generation and Carnot Performance: Consider the diagram below of a heat pump, engine 1, that iscomposed to two internal engines: a forward heat engine, engine 2, and a smaller heat pump, engine 3. For thetemperatures and heat transfer rates given, determine:(A) The appropriate performance values for each engine: COPн,1, TH,2, and COPн,3(B) The Carnot performance values for each engine: COPH,1,CARNOT, TH,2,CARNOT, and COPH,3,CARNOT(C) The rate of entropy generation in each engine: Šgen,1, Šgen,2, and $gen,32600 K450 W2400 W190 W1000 W300 K

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Answered: Entropy Generation and 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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For the binary cycle shown, the enthalpies are h1 3,185 kJ/kg; h2-2,206 kJ/kg: h3 178 kJ/kg: h4 184 kJ/kg: ha - 358 kJ/kg: hb- 274 kJ/kg: hc- 112 kJ/kg: and hd - 113 kJ/kg. The mass flow rate in the topping cycle is 2.8 kg/s. What is the heat transfer in the condenser? Express your answer in kW. www.G wwwww O
Air (Rair = 0.287 ) as an ideal gas flows through the turbine and heat exchanger arrangement kg-K, shown below. Steady-state data are given on the figure. Stray heat transfer and kinetic and potential energy effects can be ignored. Sketch a T - s diagram of processes 1-4 and determine: (a) The entropy production of turbine 1 [3.2 kW /K] (b) The isentropic efficiency of turbine 1 [75%] (c) The exit temperature of turbine 2 if its isentropic efficiency is nr, = 0.85 [960 K] (d) The entropy production within the intermediate heat exchanger [3.2 kW/K] W1 = 10,000 kW Wn= ? Turbine Turbine P3= 4.5 bar T3 = ? T = 1100 K P2=5 bar P4 = 1 bar Air wwww www 2 4 T = 1400 K Pi = 20 bar Ts = 1480 K 5 Ps = 1.35 bar ms = 1200 kg/min Heat exchanger V T = 1200 K P6 =1 bar %3D Air in
A heat engine receives 174 kW of heat from a reservoir at 1200 K, produces 52 kW of power, and rejects the remaining heat to a thermal reservoir at 300 K. What is the entropy generation rate (kW/K) of this heat engine? Type your answer...
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1. A heat pump design creates a heating effect of 35 kW while using 15 kW of electrical power. wwww wwwwn wwwww w The thermal energy reservoirs are at 300 K and 250 K. www ww (a) Show the system sketch and label all the values given on it ww www u w w (b) Demonstrate the 1st law application for this system (c) Find entropy generation
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Determine the Coefficient of Performance (COP) of the reversible cycle shown in the sketch (T in Rankine). Use the differential form relating heat transfer, temperature and entropy and do some basic integrals to get your Q values to use in COP calculation. 1000 500 0.1 S (Btu/R) 0.4 T(R)
A heat pump design creates a heating effect of 35 kW while using 15 kW of electrical power. The thermall energy reservoirs are at 300 K and 250 K. (a) Show the system sketch and label all the values given on it(b) Demonstrate the 1st law application for this system(c) Find entropy generation
Air goes through a Brayton cycle gas turbine, entering the compressor at 11 °C and 108 kPa. When it reaches the turbine inlet, the air is at 1,061 °C and 1.23 MPa. What is the net change in specific enthalpy of the working fluid after going through the compressor and heat addition processes? You may assume that the specific heat capacity c, is a constant 1.005 --1. kJ-kg 1.K1 throughout the whole cycle. Give your answer in kJ-kg1 to one decimal place.
All reversible heat engines operating between the same two reservoirs have the same efficiency (the second Carnot principle).
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