18. For the steam turbine cycle shown to the right, water leaves the closed feedwater heater as saturated liquid and water is extracted from the steam turbine, in mixture form, for use in the closed feedwater heater. Determine TTD of the closed feedwater heater. 7
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- 44. The schematic diagrams of two suggested designs for a boiling water reactorare shown in the figures. One uses a direct cycle and the other a dual cycle. Theoutlet conditions for both designs are the same. In both designs, steam leaves thesteam separator assembly with a quality of 95% to enter the high pressure turbine(HPT) while the saturated liquid with 95 weight percent being recirculated to thereactor. The vapor is expanded successively in the HPT, the intermediate pressureturbine (IPT), and the low pressure turbine (LPT) before entering the condenserbeing at a 64 mm-Hg. Moisture separators between the HPT and IPT and betweenthe IPT and LPT reduce the steam moisture to 1%; the separated liquid is used toheat the feedwater in an open feedwater heater. The heated condensate and the recirculatedwater from the steam separator are pumped through the reactor. Assume100% efficiency in all pumps, and neglect pressure losses in the moistureseparators. Take all turbine efficiencies as…A reversible refrigerator operates using a Carnot refrigeration cycle. It operates usingr-134a between 140 and 400 kPa. The refrigerant exits the compressor (and enters the condenser) assaturated vapor. It also leaves the condenser as saturated liquid.a. Sketch the P-v and T-s diagram of this cycle. Define the coordinate properties of each state oneach graph.b. Evaluate the specific heat and specific work properties of each (in kJ/kg). Indicate the sense.c. Evaluate the coefficient of performance using the specific heats and works from the previousitem. Did it match with the COPR obtained if you used the operating temperatures? Solve for states first. Then, show the solution to each of the above required in order.Draw the schematic or plant layout. Draw the T-s diagram Mandatory: A, B, C Suggested: D, E, F In a reheat cycle steam at 8.0 MPa and 485°C enters the turbine and expands to 1.4 MPa. At this point, the steam is withdrawn and passed through a reheater. It re-enters the turbine at 1.3 MPa and 720°C. Expansion now occurs to the condenser pressure of 0.006 MPa. For the cycle and 1 kg of steam determine: (A) QA’ (B) Wnet’ (C) ec’ For the engine, determine: (D) WT (E) ee’ (F) Steam flow for an output of 40,000 kW
- Question 4 of 15 Steam enters the turbine of a vapor power plant at 600 lbf/in.2, 1000°F and exits as a two-phase liquid-vapor mixture at 90°F. Condensate exits the condenser at 85°F and is pumped to 600 lbf/in.2 The turbine and pump isentropic efficiencies are 90 and 80%, respectively. The net power developed is 1 MW. Determine: (a) the percent steam quality at the turbine exit. (b) the percent thermal efficiency. (c) the steam mass flow rate, in lb/h. IQ1: 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.Consider a simple and ideal water vapor Rankine cycle shown to the right. Condenser operates at a temperature of 313 K and boiler works at 573 K. Points 1 and 3 are located at the vapor dome curve. Use tables at your discretion. Compute: a. operating pressure of boiler b. operating pressure of condenser c. power required to operate pump d. entropy of a fluid upon exiting the turbine e. quality of vapor that enters condenser. f. power output of a turbine
- A. Problem solving A steam power cycle has a boiler pressure of 10 MPa and temperature of 330°C. The condenser pressure is 0.1 MPa. The stage efficiency of the turbine is 86%, mechanical efficiency is 88%, and generator efficiency is 96%. Determine the following: a. Total heat added b. Total turbine work C. Heat rejected in the condenser d. Total pump work e. Net cycle work f. Cycle thermal efficiency g. Engine thermal efficiencies (ideal, indicated, brake, combined) h. Steam rates (ideal, indicated, brake, combined) Heat rates (ideal, indicated, brake, combined) 1. Considering a simple Rankine cycle 2. Considering a reheat cycle with reheat pressure of 2 MPa 3. Considering a regeneration cycle with regeneration pressure of 2 MPa 4. Considering a reheat-regenerative cycle with pressure of 2 MPa simultaneously.2. A reheat cycle with two stages of reheating is executed with steam expanding initially from 20 MPa and 540 °C. The two reheater pressures are 3.8 MPa and 0.97 MPa and the steam leaves each reheater at 540 °C. Condensation occurs at 60 °C. For the ideal cycle and 1 kg/sec of steam, find the following: a. Heat added b. Cycle efficiency 3. A steam power plant operates on the reheat Rankine cycle. Steam enters the high-pressure ino ot 12 5 AARa an d 550 oc 77 1.In a steam plant 100 kg/min of dry-saturated steam at 30 bar enters the turbine. After expanding isentropic ally the exhaust steam enters the condenser. The condenser pressure is maintained at 0.1 bar by the cooling water taken from a nearby river. Calculate the following: a. Moisture fraction of exhaust steam. b. Turbine work output in KW c. Work input to the feed pump in KW d. Heat supplied to the boiler KJ/sec e. Heat rejected to the cooling water KJ/sec f. Efficiency of the plant. g. Net power output.
- Steam enters the turbine of a vapor power plant at 600 lbf/in.?, 700°F and exits as a two-phase liquid-vapor mixture at 90°F. Condensate exits the condenser at 85°F and is pumped to 600 lbf/in.2 The turbine and pump isentropic efficiencies are 90 and 80%, respectively. The net power developed is 1 MW. Determine: (a) the percent steam quality at the turbine exit. (b) the percent thermal efficiency. (c) the steam mass flow rate, in Ib/h.complete solutions with four decimal digits. Box the final answers, Write legibly. An ideal Rankine cycle has a boiler pressure of 8 MPa, a condenser pressure of 0.05 MPa, andthe temperature of the steam entering the turbine is 540 °C. Calculate the following:a. Moisture content of the steam entering the condenserb. Turbine workc. Pump workd. Heat addede. Heat rejectedf. Thermal efficiencySteam from a turbine with inlet pressure 30 bar and temperature 350°C is bled at 5 bar and 1 bar to supply a two-stage regenerator to heat up condensate leaving the turbine at 0.08 bar. In each stage, the condensate is heated up to the saturation temperature of the bled steam and the bled steam itself condenses completely. Remember: in a regenerator, there is no contact between the two streams, only heat exchange. of Consider the amount of steam bled at 5 bar and 1 bar, respectively, to be m¡ and m2 kg per steam supplied to the turbine. For the first stage, m¡ kg of bled steam at 5 bar heats each kg of condensate arriving from the second stage without any contact (that is, regeneration). Then, m¡ kg of condensate derived from the bled steam drains into the steam space of the second stage at 1 bar without heat loss. The combined drain from the second stage at 1 bar consists of mi+m2 kg per kg of steam supplied to the turbine. The combined drain is cooled to the condenser temperature…