2. A power plant operates between pressures of 80 bar and 0.1 bar in an ideal Rankine cycle.The maximum cycle temperature is 600 deg. Celsius. For mass flow rate of 5 kg/sec, 3. Same condition as in problem #2 except that the steam turbine and condensate pumpefficiencies are 0.9 and 0.8 respectively. Solve the following:3.1 Actual turbine work, KW3.2 Net work, KW3.3 Decrease in thermal efficiency due to irreversibility

Answered: Image /qna-images/answer/835e8083-e040-4954-8268-cafc196c8b8c.jpg

Answered: 3. Same condition as in problem #2…

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

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Steam is the working fluid in the ideal Rankine cycle 1–2–3–4–1 and in the Carnot cycle 1–2–3’–4’–1 that both operate between pressures of 1.5 bar and 60 bar as shown in the T–s diagram in Fig. below. Both cycles incorporate the steady flow devices shown in Fig. For each cycle determine (a) the net power developed per unit mass of steam flowing, in kJ/kg, and (b) the thermal efficiency. Compare results and comment.
Need help with this engineering problem. Steam is the working fluid in the ideal Rankine cycle 1–2–3–4–1 and in the Carnot cycle 1–2–3'–4'–1 that both operate between pressures of 1 bar and 100 bar as shown in the T–s diagram in the figure below. Both cycles incorporate the steady flow devices. For each cycle determine: (a) the net power developed per unit mass of steam flowing, in kJ/kg. (b) the percent thermal efficiency.
A single-pressure combined-cycle power plant consisting of a gas turbine, HRSG, and steam turbine plant. The gas turbine exhaust gas flow rate is 600 kg/s, temperature is 600°C, live steam condition is 70 bar/500°C, condenser pressure is 0.04 bar, and feedwater temperature is 140°C. Assuming a pinch point of 12 K for both high and low pressure, an exhaust gas specific heat of 1.05 kJ/(kg K), and an isentropic efficiency of the steam turbine of 0.9, calculate: (a) the rate of steam production in kg/s, (b) the stack gas temperature in °C, (c) the steam turbine power output in MW, and (d) the heat transfer rate in the HRSG in kJ/s.
Q2/ Actual Rankine cycle, has the following specifications: Boiler pressure is 160 bar and Turbine inlet temperature is 600 Co and Condenser pressure is 0.08 bar , Turbine efficiency is 0.9 and Pump efficiency is 0.85 and Steam mass flow rate is 130 kg/s Calculate: 1-Work net (kW). 2-heat addition (kW) 3-thermal efficiency.
A ____ cycle consists of two Rankine vapor power cycles that use different working fluids.
Q#1. A gas-turbine plant operates on the regenerative Brayton cycle, the schematic diagram of whichis shown in Fig. Q 1, with two stages of reheating and two-stages of intercooling between the pressure limits of100 and1200 kPa . The working fluid is air. The air enters the first and the second stages of the compressor at 300 K and 350 K , respectively, and the first and the second stages of the turbine at 1400 K and 1300 K , respectively. Assuming both the compressor and the turbine have an isentropic efficiency of 80%. The regenerator has an effectiveness ofεregen=75% . Assume variable specific heats (i.e., use the concept of relative pressures) and the intermediate pressuresof intercooling and reheating is the square root of the product of inlet and exit pressures for intercooling and reheating. Make other the necessary assumptions and determine(a) the back work ratio,β , and the net work output,, wnet(b) the thermal efficiency (that is the first-law efficiency,ηi ) and(c) the…
A regenerative Rankine cycle has steam entering turbine at 200 bar, 650°C and leaving at 0.05 bar. Considering feed water heaters to be of open type determine thermal efficiency for the following conditions; (a) there is no feed water heater (b) there are two feed water heaters working at 40 bar and 4 bar respectively.
Draw the diagram. In a reheat Rankine cycle, the steam throttled condition is 8 MPa and 480°C. The steam is then reheated to 2 MPa and 460 °C. If turbine exhaust is 60 °C, determine the following: a. Heat Added b. Turbine Work c. Heat Rejected d. Pump Work e. Net Work f. Efficiency
In a simple Rankine cycle, the steam throttled condition is 8 MPa and 480 °C. The steam is then reheated to 2 MPa and 460 °C. If turbine exhaust is 60 °C. Determine: Heat Added Turbine Work Heat Rejected Pump Work Net Work Efficiency, in % Use: 8 MPa and 480 C (Table 3. Vapor) h1 = 3348.4 kJ/kg s1 = 6.6586 kJ/kg – K 2 MPa (Table 3. Vapor; note: s1 = s2) h2 = 2963.145 kJ/kg 2 MPa and 460 C (Table 3. Vapor; note: s3 = s4) h3 = 3379.5 kJ/kg s3 = 7.3147 kJ/kg – K 60C (Table 1. Saturation Temperatures) P5 = 0.019940 MPa = 19.94 kPa hf = 251.13 kJ/kg = h5 hfg = 2358.5 kJ/kg sf = 0.8312 kJ/kg – K sfg = 7.0784 kJ/kg – K vf = 0.0010172 m3/kg = v5 Solving for h4 s3 = s4 = sf + xsfg 7.3147 kJ/kg – K = 0.8312 kJ/kg – K + x (7.0784 kJ/kg – K) x = 0.9159555832 h4 = hf + x(hfg) h4 = 251.13 kJ/kg + 0.9159555832 (2358.5 kJ/kg) h4 = 2411.411243 kJ/kg Solving for h6 h6 = v5 (P6 – P5) + h5 h6 = 0.0010172 m3/kg (8000 kN/m2 – 19.94 kN/m2) + 251.13 kJ/kg h6 = 8.117317032 kJ/kg + 251.13 kJ/kg…
A steam power plant working on Rankine cycle has the range of operation from 40 bar dry saturated to 1.2 bar. Draw the T-s and h-s diagrams and determine the following: (i) Steam quality at turbine exit (ii) Cycle efficiency (iii) Work ratio (iv) Steam rate
A dual-pressure combined-cycle power plant consists of a gas turbine,HRSG, and steam turbine plant. The gas turbine exhaust gas flow rate is590 kg/s, temperature is 608°C, HP superheated steam condition is 140bars and 550°C temperature, LP saturated steam is at 8 bar, condenserpressure is 0.05 bar, and feedwater temperature is 120°C. Assuming apinch point of 11 K for both high and low pressure, an exhaust gas specific heat of 1.05 kJ/(kg K), and an isentropic efficiency of the steamturbine of 0.9, calculate (a) the total steam production rate of the HRSG inkg/s, (b) the HRSG heat transfer rate in kJ/s, (c) the stack gas temperaturein °C, and (d) the steam turbine power output in kW.
An ideal Rankine cycle operates between the pressure limits of 15,000 kPa in the boiler and 15 kPa in the condenser. If the turbine inlet temperature is 500 deg C and the cycle produces 2500 kW of net work, determine the mass flow rate of the steam in kg/s. Refer to the tables below. a. 1.993 b. 2.122 c. 1.856 d. 2.016

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3. Same condition as in problem #2 except that the steam turbine and condensate pump efficiencies are 0.9 and 0.8 respectively. Solve the following: 3.1 Actual turbine work, KW 3.2 Net work, KW 3.3 Decrease in thermal efficiency due to irreversibility