FUNDAMENTALS OF THERMODYNAMICS
10th Edition
ISBN: 9781119634928
Author: Borgnakke
Publisher: WILEY
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REHEAT CYCLE / REGENERATIVE CYCLE
An ideal reheat turbine with one stage of reheat recieves steam at 8.0 Mpa,500°c.Reheat pressure is 0.83 Mpa and exhaust pressure is 0.007 mpa. The work is 1559kj/kg and the thermal efficiency is 41.05%.Find the temperature of steam leaving the heater.
Steam at 6.2 MPa and 480°C is received by a regenerative engine. Extractions for feedwaterheating occurs at 3 MPa and again at. 1.4 MPa,with the remaining steam expanding to0.0065 MPa. For the ideal engine with a throttla flow of 54,500 kg/h, find the hourlyquantities of steam ex-tracted, the turbine work in kW, and the thermal efficiency. For an ideal cycle through the same states, calculate Q and e。
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- In an air standard diesel cycle the state before the compression is 100kPa and 300K .A peak pressure of 6000kPa and a maximum temperature of 2400K exist in the cycle. Find the efficiency of the cycle.arrow_forwardIn a reheat cycle steam at 550°C expands in an h.p. turbine till it is saturated vapour. It is reheated at constant pressure to 450°C and then expands in a I.p. turbine to 40°C. If the maximum moisture content at turbine exhaust is limited to 10%, find (a) the reheat pressure, (b) the boiler pressure, c) the net specific work output,plss give info as much as possiblearrow_forwardReheat steam has 2000 psia throttle pressure at the turbine inlet and 410 kPa reheat pressure, the throttle and reheat temperature of the steam is 1010 F, condenser pressure is 0.50 psia, engine efficiency of high pressure and low pressure is 75%. Find the cycle thermal efficiency.arrow_forward
- SOLVE 4 KNLYarrow_forward2. An ideal turbine with one stage of reheat receives steam at 8 MPa, 500°C. Reheat pressure is 0.8 MPa and exhaust pressure is 0.005 MPa. The work is 1,560 and the kg thermal efficiency is 82%. Find the temperature of the steam leaving the reheater.arrow_forward1. 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.arrow_forward
- An ideal reheat turbine with one stage of reheat receives steam at 8.0 MPa, 500° C. Reheat pressure is 0.83 MPa and exhaust pressure is 0.007 MPa. The work is 1559 kJ/kg and the thermal efficiency is 41.05%. Find the temperature of steam leaving the reheater.arrow_forwardIn a carnot cycle. The pressure at the end of heat rejection is 14 psia while the pressure at the end of expansion is 329 kPaa. Find the cycle efficiency in % if the working fluid is hot airarrow_forward9.86 A refrigeration cycle runs with R-134a having low pressure of 200 kPa and high pressure of 1000 kPa. It cools a cold space at -5°C with a rate of 750 W and the whole system sits in a 27°C room. Find the COP for the cycle and specify all the entropy gen- eration terms by location and rates.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_forwardA reheat steam cycle has 13500 kPa throttle pressure at the turbine inlet and 2800 kPa reheat pressure. The throttle and reheat temperature of the steam is 540°C. The condenser pressure is 3.4 kPa. Find the cycle thermal efficiency in %. Note: At 13.5 MPa, tsat = 333.88 deg C, s, 3.5921 kJ/kg-K, Sg 5.4022 kJ/kg-K.arrow_forwardIn a carnot cycle. The pressure at the end of heat rejection is 15 psia while the pressure at the end of expansion is 199 kPaa. Find the cycle efficiency in % if the working fluid is cold airarrow_forward
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