FUNDAMENTALS OF THERMODYNAMICS
10th Edition
ISBN: 9781119634928
Author: Borgnakke
Publisher: WILEY
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1. In
a Regenerative cycle, the steam is extracted from the turbine at 2
Mpa and 250C for feedwater heating and it is mixed with condenser exit
at 30 kpa after pumping. Find the fraction of vapor extracted from the
turbine.
Pleae solve this problem and give an explanation of how you have picked up values from steam tables... Also explain how would we find enthalpy after fluid expansion in first turbine
1. In a steam power plant steam enters the turbine at 6 bar and 400°C 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.
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- A thermal power plant operates such that the steam exits boiler at 4 MPa, 400C and the condenser pressure is 10 kPa. The efficiency of the turbine and pump is 85% and 90% respectively. a. Draw the plant PFD (Process Flow Disgram) and the process Ts diagram and calculate quality of steam discharge from the turbine as well as the plant's thermal efficiency. b. If the plant produces 300MW of net power, - What is the steam flowrates in kg/hr? - If the plant uses natural gas as a fuel, determine the flowrate of NG in MMSCMD. State the reference for your data. - If the plant uses coal as a fuel, determine the amount of coal required (tonne per annum). State the reference for your data and all your assumptions. c. How much power required by the pump in kW? Is this the real power required by the pump? Explain d. Find the heat rejected in the condenser and evaluate the thermal efficiency using this value. e. The heat rejected to surrounding is through a cooling water system from a nearby ocean.…arrow_forward1. Steam at 14 Mpa and 700°C is received by a regenerative cycle. Before condensation at 70 kPa, steam extracted for feedwater heating at 5 Mpa. On the mass basis of 1 kg of throttle steam, find the thermal efficiency of the engine. PLEASE SHOW COMPLETE SOLUTION (DRAW THE TS DIAGRAM)arrow_forwardI do not understand how to fix state 3 with the given information. Without knowledge of state 3 or 4s (the 4th state if the process were actually isentropic) I don't see how it's possible to get temperature or enthalpy of state 3.arrow_forward
- The condensing pressure for a Rankine Engine is 1.6 bar. 200°C and the steam at the beginning of expansion is at 3.75 Mpa, 400°C. Calculate the efficiency of cycle and engine using mollier chart. Can you show me the detailed step by step solution?arrow_forwardDraw the T-s diagram and Plant Lay-Out A steam power plant has a steam generator (boiler) exit at 4 MPa, 500°C and a condenser exit temperature of 45°C. Assume all components are ideal and find the: (A) Ideal pump work(B) Heat added in the boiler(C) Heat rejected in the condenser(D) Net cycle Work(E) Cycle thermal Efficiencyarrow_forwardH.W. 4.1. Consider a regenerative cycle using steam as the working fluid . Steam leaves the boiler and enters the turbine at 4 MPa, 400 oC. After expansion to 400 kPa, some of the steam is extracted from the turbine for the purpose of heating the feedwater in an open feedwater heater. The pressure in the feedwater heater is 400 kPa and the water leaving it is saturated liquid at 400 kPa. The steam not extracted expands to 10 kPa. Determine the cycle efficiency. Answers: 37.5%arrow_forward
- Steam is supplied to a two-stage turbine at 48 bar and 400 °C. It expands in the firstturbine until it is just dry saturated, then it is re-heated to 400 °C and expandedthroughthe second-stage turbine. The condenser pressure is 0.04 bar. Determine the specific work output of the system to 3 d.p? what is the specific entalphy in kJ/kg for state 2?arrow_forwardFor each control volume analyzed, the thermodynamics model is the steam tables, the process is SSSF (steady state, steady flow), and the changes in kinetic and potential energies are negligible. Consider a reheat cycle utilizing steam. Steam leaves the boiler and enters the turbine at 4 Mpa, 400°C. After expansion in the turbine to 400 kPa, the steam reheated to 400ºC and then expanded in the low pressure turbine to 10 kPa. Determine the cycle efficiency.arrow_forward2.) A Steam power plant operates using the actual Rankine Cycle where steam initially enters the turbine at 5.0 MPa and 400C then after an irreversible adiabatic process, it exits the turbine with a dryness of 0.90. It then condenses at 7 kPa and exits as saturated liquid. Draw the TS diagram, find the thermal efficiency, and steam rate.arrow_forward
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Power Plant Explained | Working Principles; Author: RealPars;https://www.youtube.com/watch?v=HGVDu1z5YQ8;License: Standard YouTube License, CC-BY