FUND OF ENG THERMODYN(LLF)+WILEYPLUS
9th Edition
ISBN: 9781119391777
Author: MORAN
Publisher: WILEY
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Describe the Internally and Externally Reversible Processes
02. The Li-Br water absorption
cycle operate at the following
temperature:
generator temperature = 90 °C,
condenser temperature =35 °C,
evaporator
temperature-5 "C, and absorber
temperature - 30 "C. The flow rate
of solution delivered by the pump
is 0.4 kg/s. Calculate
a- The mass flow rate of
the solution return from the
generator to the absorber, and of
the refrigerant.
b- The rate of heat transfer at
each of components and the
СОР.
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- The LiBr-water absorption cycle shown in Fig. 17-2 operates at the following temperatures: generator, 100°C; condenser, 55°C; evaporator, 10°C, and absorber, 30°C. The flow rate of solution delivered by the pump is 0.4 kg/s. What is the mass flow rate of refrigerant?arrow_forwardShow your complete solution.arrow_forwardA reheat cycle with two stages of reheating is executed with steam expanding initially from 200 bar (20 Mpaa) and 540 deg C. The 2 reheater pressures are 40 bar (4 Mpaa) and 10 bar (1 Mpaa) and the steam leaves each reheater at 540 deg C. Steam is bled in between two reheating sessions at a pressure equal to 20 and 15 bars into 2 open feedwater heaters. Condensation occurs at 60 deg C. All expansion and compression efficiencies are 90 %. There is a total of 10.3 kg/sec of steam (total mass flow rate m) circulated in the cycle. Answer the following: fill up the blanks in the items below: Actual Rankine cycle efficiency % using Qa’ and Qr’ values Answer: _____________ If the generator efficiency = 95%, brake engine efficiency = 90% what is the plant capacity in MW? Answer: ______________________ If Cp water = 4.187 KJ/kg-K; cooling water enters the condenser at 12 deg C and leaves at 21 deg C, find amount of cooling water needed by the condenser in kg/sec. (ACTUAL) Answer:…arrow_forward
- A reheat cycle with two stages of reheating is executed with steam expanding initially from 200 bar (20 Mpaa) and 540 deg C. The 2 reheater pressures are 40 bar (4 Mpaa) and 10 bar (1 Mpaa) and the steam leaves each reheater at 540 deg C. Steam is bled in between two reheating sessions at a pressure equal to 20 and 15 bars into 2 open feedwater heaters. Condensation occurs at 60 deg C. All expansion and compression efficiencies are 90 %. There is a total of 10.3 kg/sec of steam (total mass flow rate m) circulated in the cycle. Answer the following: fill up the blanks in the items below: Equipment layout and TS diagram for the cycle. Ideal turbine work (KW) Ans:_______________________________ Actual mass of steam bled into the open heater m1’= _____________kg/sec for the heater nearest to the SGU/boiler and m2’ = _____________________kg/sec for the heater nearest to the condenser. Actual engine efficiency (%) Answer: _______________________ Actual Rankine cycle efficiency %…arrow_forwardA reheat cycle with two stages of reheating is executed with steam expanding initially from 200 bar (20 Mpaa) and 540 deg C. The 2 reheater pressures are 40 bar (4 Mpaa) and 10 bar (1 Mpaa) and the steam leaves each reheater at 540 deg C. Steam is bled in between two reheating sessions at a pressure equal to 20 and 15 bars into 2 open feedwater heaters. Condensation occurs at 60 deg C. All expansion and compression efficiencies are 93 %. There is a total of 4.5+ (3*25/100) kg/sec of steam circulated in the cycle. Answer the following: fill up the blanks in the items below: 1. Equipment layout and TS diagram for the cycle 2. Actual mass of steam bled into the open heater m1'= kg/kg for the _kg/sec for the heater nearest to the SGU/boiler and m2' = heater nearest to the condenser. 3. Actual turbine work in KW Answer: 4. Energy Chargeable (actual) Answer: 5. Ideal Rankine engine efficiency % Answer:arrow_forwardExample 15.12. A steam turbine is fed with steam having an enthalpy of 3100 kJ/kg. It moves out of the turbine with an enthalpy of 2100 kJ/kg. Feed heating is done at a pressure of 3.2 bar with steam enthalpy of 2500 kJ/kg. The condensate from a condenser with an enthalpy of 125 kJ/kg enters into the feed heater. The quantity of bled steam is 11200 kg/h. Find the power developed by the turbine. As.um. that the water leaving the feed heater is saturated liquid at 3.2 bar and the heater is direct mixing type. Neglect pump work.arrow_forward
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- Show your complete solution.arrow_forwardQ1: A Carnot engine with H₂O as the working fluid. The circulation rate is (1Kg/sec) for conden: temperature 300K and boiler temperature 475K.Determine: 1. The quality at the inlet and outlet points of condenser. 2. The rate of heat addition. 3. The rate of heat rejection. 4. The power for each of the four steps. The thermal efficiency of the cycle. 5. T/K P/kPa H/(k J/kg) H/(k J/kg) S/(k J/kg.K) S/(k J/kg.K) 300 3.533 112.5 2550.6 0.3929 8.5200 475 1616.0 860.7 2792.0 2.3482 6.4139 Q2: Explain with draw the development steps of Ranking cycle on T-S diagram.arrow_forwardgive answer all questions with explanation.arrow_forward
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