FUNDAMENTALS OF THERMODYNAMICS
10th Edition
ISBN: 9781119634928
Author: Borgnakke
Publisher: WILEY
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STEAM IS DELIVERED TO AN ENGINE AT 5 MPa and 600°C. BEFORE CONDENSATION AT 30°C.
STEAM IS EXTRACTED FOR FEEDWATER HEATING 0.60 MPa. FOR AN IDEAL CYCLE, FIND
(A) THE AMOUNT OF STEAM EXTRACTED.
(B) WORK
(C) THERMINAL EFFICIENCY . FOR AN IDEAL ENGINE AND SAME STATES, COMPUTE.
(D) WORK AND THERMINAL EFFICIENCY
(E) STEAM RATE.
A power plant operating in a Reheat Rankine Cycle produces steam at 3 MPa, 600oC in the boiler. It keeps the condenser at 45oC by transfer of 10 MW out as heat transfer. The first turbine section (high-pressure) expands to 500 kPa and then flow is reheated followed by the expansion in the low-pressure turbine.
Provide a detailed solution. Avoid shortcuts.
Determine the values of enthalpy for each state.
3. An ideal regenerative cycle is executed with steam
generation at 10.0 MPa and 600°C. Before
condensation at 0.005 MPa, steam is extracted for
feedwater heating first at 2.5 MPa and second at 0.6
MPa. On the basis of 1 kg of throttle steam, find
(A) the quantity of steam extracted at each point
(B) QA and eth
(C) WT, ee, m
(D) For a combined steam rate of 3.34 kg/kWh,
what is nk?
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- in an ideal rankine cycle, steam is generated at 4.1 mpa and 48°C. The condense is at 32°C. Determine the ideal pump workarrow_forwardA reheat cycle with two stages of reheating is executed, with steam expanding initially from 90 bar and 530C. The two reheater pressure are 10 bar and 0.6 bar, and the steam leaves each reheater at 480C. Condensation occurs at 0.04 bar. For an ideal cycle, find (a) QA and e. (b) For the engine, ignore the pressure drop through the reheaters, let the engine operate through the same states and compute W and e. (c) What is the steam flow rate for an engine output of 20,000kW? Answer: (a) 4657.5 KJ/kg, 44.31%; (b) 2072.6 KJ/kg, 44.41%; (c) 9.65 kg/sarrow_forward2arrow_forward
- In an ideal Rankine cycle the boiler pressure is 10 MPa. All components are operating at steady state and adiabatically. The steam enters the turbine at 550oC. The condenser pressure is 15 kPa. Determine the cycle efficiency.Find the entropy generation for the condenser for 6 kg/min mass flow rate of steam. This is a Thermodynamics question. Please explain all steps and write nicely. Thanks.arrow_forwardSteam is supplied to a two-stage turbine at 140 bar and 400C. It expands isentropic ally until it is just dry-saturated. Then it is reheated to 350C at constant pressure and expanded in the second-stage turbine to the condenser pressure of 0.2 bar. If the isentropic efficiency of the second stage is 78%. Calculate the specific steam consumption and the thermal efficiency.arrow_forwardPlease Answer all my Question .. Please help me , I don't want plagiarism.arrow_forward
- Discuss and Illustrate the PV diagram for Carnot Cycle.arrow_forwardIn a steam power plant steam enters the turbine at 6 bar and 4000C and is expanded isentropic ally to the condenser pressure of 0.1 bar. If the isentropic efficiency of the turbine is 80%, find the actual net work output and the thermal efficiency.arrow_forwardA 330 MW steam power plant operates according to the simple ideal Rankine cycle. Water vaporenters the turbine at 10 MPa pressure and 525 ° C temperature and 15 kPa condenser pressureIt is expanding. A T-s with cycle, saturated liquid and saturated steam curvesshow in the diagram and (a) the degree of dryness of the steam at the turbine outlet, (b) the thermal efficiency of the cycle,(c) calculate the mass flow of water vapor circulating in the cyclearrow_forward
- Please don't use chatgpt. I am confused with the sign (direction). Please explain correctly if you are not sure just leave it to others.arrow_forwardA turbine is supplied with steam at 25 BAR, 42C and exhaust into a condenser at 55 KPa. Find the thermal efficiency of the cycle. Draw the schematic and T-S diagrams with corresponding labels. (Clear handwritten and step by step solution)arrow_forwardThe production well of a typical geothermal power plant is at 230°C saturated liquid and ground water flow rate of 230kg/s with separator pressure of 0.5MPaa while its condenser pressure is at 0.01MPa. the turbine and generator efficiencies are 83% and 87% , respectively. Sketch the T-s diagram of the system. Determine the amount of mass flowing into the reinjection well from the separator, generator output, heat rejection in the condenser and overall plant efficiency.arrow_forward
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