Thermodynamics: An Engineering Approach
8th Edition
ISBN: 9780077624811
Author: CENGEL
Publisher: MCG
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Textbook Question
Chapter 10.9, Problem 92P
Why is steam not an ideal working fluid for vapor power cycles?
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Chapter 10 Solutions
Thermodynamics: An Engineering Approach
Ch. 10.9 - Why is the Carnot cycle not a realistic model for...Ch. 10.9 - Why is excessive moisture in steam undesirable in...Ch. 10.9 - A steady-flow Carnot cycle uses water as the...Ch. 10.9 - A steady-flow Carnot cycle uses water as the...Ch. 10.9 - Consider a steady-flow Carnot cycle with water as...Ch. 10.9 - Water enters the boiler of a steady-flow Carnot...Ch. 10.9 - What four processes make up the simple ideal...Ch. 10.9 - Consider a simple ideal Rankine cycle with fixed...Ch. 10.9 - Consider a simple ideal Rankine cycle with fixed...Ch. 10.9 - Consider a simple ideal Rankine cycle with fixed...
Ch. 10.9 - How do actual vapor power cycles differ from...Ch. 10.9 - Compare the pressures at the inlet and the exit of...Ch. 10.9 - The entropy of steam increases in actual steam...Ch. 10.9 - Is it possible to maintain a pressure of 10 kPa in...Ch. 10.9 - A simple ideal Rankine cycle with water as the...Ch. 10.9 - A simple ideal Rankine cycle with water as the...Ch. 10.9 - A simple ideal Rankine cycle which uses water as...Ch. 10.9 - Consider a solar-pond power plant that operates on...Ch. 10.9 - Consider a 210-MW steam power plant that operates...Ch. 10.9 - Consider a 210-MW steam power plant that operates...Ch. 10.9 - A simple ideal Rankine cycle with water as the...Ch. 10.9 - A simple ideal Rankine cycle with water as the...Ch. 10.9 - A steam Rankine cycle operates between the...Ch. 10.9 - A steam Rankine cycle operates between the...Ch. 10.9 - A simple Rankine cycle uses water as the working...Ch. 10.9 - The net work output and the thermal efficiency for...Ch. 10.9 - A binary geothermal power plant uses geothermal...Ch. 10.9 - Consider a coal-fired steam power plant that...Ch. 10.9 - Show the ideal Rankine cycle with three stages of...Ch. 10.9 - Is there an optimal pressure for reheating the...Ch. 10.9 - How do the following quantities change when a...Ch. 10.9 - Consider a simple ideal Rankine cycle and an ideal...Ch. 10.9 - Consider a steam power plant that operates on the...Ch. 10.9 - Consider a steam power plant that operates on the...Ch. 10.9 - An ideal reheat Rankine cycle with water as the...Ch. 10.9 - Steam enters the high-pressure turbine of a steam...Ch. 10.9 - An ideal reheat Rankine cycle with water as the...Ch. 10.9 - A steam power plant operates on an ideal reheat...Ch. 10.9 - Consider a steam power plant that operates on a...Ch. 10.9 - Repeat Prob. 1041 assuming both the pump and the...Ch. 10.9 - Prob. 43PCh. 10.9 - Prob. 44PCh. 10.9 - How do open feedwater heaters differ from closed...Ch. 10.9 - How do the following quantities change when the...Ch. 10.9 - Cold feedwater enters a 200-kPa open feedwater...Ch. 10.9 - In a regenerative Rankine cycle. the closed...Ch. 10.9 - A steam power plant operates on an ideal...Ch. 10.9 - A steam power plant operates on an ideal...Ch. 10.9 - A steam power plant operates on an ideal...Ch. 10.9 - Consider an ideal steam regenerative Rankine cycle...Ch. 10.9 - Consider a steam power plant that operates on the...Ch. 10.9 - Consider a steam power plant that operates on the...Ch. 10.9 - Consider a steam power plant that operates on the...Ch. 10.9 - A steam power plant operates on an ideal...Ch. 10.9 - Repeat Prob. 1060, but replace the open feedwater...Ch. 10.9 - A steam power plant operates on an ideal...Ch. 10.9 - A simple ideal Rankine cycle with water as the...Ch. 10.9 - Prob. 64PCh. 10.9 - An ideal reheat Rankine cycle with water as the...Ch. 10.9 - Consider a steam power plant that operates on a...Ch. 10.9 - Prob. 67PCh. 10.9 - A steam power plant operates on an ideal...Ch. 10.9 - The schematic of a single-flash geothermal power...Ch. 10.9 - What is the difference between cogeneration and...Ch. 10.9 - Prob. 71PCh. 10.9 - Prob. 72PCh. 10.9 - Consider a cogeneration plant for which the...Ch. 10.9 - Steam is generated in the boiler of a cogeneration...Ch. 10.9 - A large food-processing plant requires 1.5 lbm/s...Ch. 10.9 - An ideal cogeneration steam plant is to generate...Ch. 10.9 - Steam is generated in the boiler of a cogeneration...Ch. 10.9 - Consider a cogeneration power plant modified with...Ch. 10.9 - Prob. 80PCh. 10.9 - Why is the combined gassteam cycle more efficient...Ch. 10.9 - The gas-turbine portion of a combined gassteam...Ch. 10.9 - A combined gassteam power cycle uses a simple gas...Ch. 10.9 - Reconsider Prob. 1083. An ideal regenerator is...Ch. 10.9 - Reconsider Prob. 1083. Determine which components...Ch. 10.9 - Consider a combined gassteam power plant that has...Ch. 10.9 - Prob. 89PCh. 10.9 - What is the difference between the binary vapor...Ch. 10.9 - Why is mercury a suitable working fluid for the...Ch. 10.9 - Why is steam not an ideal working fluid for vapor...Ch. 10.9 - By writing an energy balance on the heat exchanger...Ch. 10.9 - Prob. 94RPCh. 10.9 - Steam enters the turbine of a steam power plant...Ch. 10.9 - Consider a steam power plant operating on the...Ch. 10.9 - A steam power plant operates on an ideal Rankine...Ch. 10.9 - Consider a steam power plant that operates on a...Ch. 10.9 - Repeat Prob. 1098 assuming both the pump and the...Ch. 10.9 - Consider an ideal reheatregenerative Rankine cycle...Ch. 10.9 - Prob. 101RPCh. 10.9 - A textile plant requires 4 kg/s of saturated steam...Ch. 10.9 - Consider a cogeneration power plant that is...Ch. 10.9 - Prob. 104RPCh. 10.9 - Prob. 105RPCh. 10.9 - Reconsider Prob. 10105E. It has been suggested...Ch. 10.9 - Reconsider Prob. 10106E. During winter, the system...Ch. 10.9 - Prob. 108RPCh. 10.9 - Prob. 109RPCh. 10.9 - A steam power plant operates on an ideal...Ch. 10.9 - A Rankine steam cycle modified for reheat, a...Ch. 10.9 - Show that the thermal efficiency of a combined...Ch. 10.9 - Prob. 118RPCh. 10.9 - A solar collector system delivers heat to a power...Ch. 10.9 - Starting with Eq. 1020, show that the exergy...Ch. 10.9 - Consider a simple ideal Rankine cycle with fixed...Ch. 10.9 - Consider a simple ideal Rankine cycle. If the...Ch. 10.9 - Consider a simple ideal Rankine cycle with fixed...Ch. 10.9 - Consider a simple ideal Rankine cycle with fixed...Ch. 10.9 - Consider a steady-flow Carnot cycle with water as...Ch. 10.9 - Prob. 126FEPCh. 10.9 - Prob. 127FEPCh. 10.9 - A simple ideal Rankine cycle operates between the...Ch. 10.9 - Pressurized feedwater in a steam power plant is to...Ch. 10.9 - Consider a steam power plant that operates on the...Ch. 10.9 - Consider a combined gas-steam power plant. Water...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- Using T- diagrams , explain why superheating and reheating is necessary in a vapor power cycle from the functional perspective . Also show how it helps improve the efficiency of the cycle .arrow_forwardWhich is more efficient reheat regenerative cycle or the regenerative cycle? Why?arrow_forwardIn steam power cycle, what is the primary objective of using a regenerative cycle? a. Decrease the amount of necessary work required by the liquid pump b. Decrease the amount of expected heat removed in the condenser c. Increase the amount of expected net work produced d. Decrease the amount of necessary heat absorbed in the boilerarrow_forward
- What is the thermal efficiency in an otto cycle using air if it has a compression constant of 8?arrow_forwardExplain in detail why we need superheated steam in a power generating plant and use T-S diagrams to support your explanation.arrow_forwardShow the COMPLETE SOLUTIONS and DIAGRAM (T-s) (Cycle) including the switching of table and interpolations/extrapolations: NO Calculator Technique and Applications. Consider an ideal steam reheat cycle where steam enters the high-pressure turbine at 3.0 MPa, 400°C, and then expands to 0.8 MPa. It is then reheated to 400°C and expands to 10 kPa in the low-pressure turbine. Calculate the cycle thermal efficiency and the moisture content of the steam leaving the low-pressure turbine.arrow_forward
- A steam power plant operates between a boiler pressure of 52 bar and a condenser pressure of 0.045 bar. Calculate for these limits the cycle efficiency for a Carnot cycle using wet steam. NB:Answer in decimal and not percentage to 4 decimal placesarrow_forwardWater is the working fuld in an Ideal Rankine cycle. Steam enters the turbine at 1400 bin² and 1000°F. The condenser pressure is 2 Iben. The net power output of the cycle is 250 MW. Cooling water experiences a temperature Increase from 60°F to 76*F, with negligible pressure drop, as it passes through the condenser. Step 1 Determine the mass flow rate of steam, In lb/h. Hint Step 2 Your answer is correct Step 3 Determine the rate of heat transfer, in Btu/h, to the working fuld passing through the steam generator. Hint Your answer is correct. 1536198.045 Step 4 2144195010 Your answer is correct Hint Determine the thermal efficiency of the cycle. 39.78 Stu/h % Determine the mass flow rate of cooling water. In lb/h 1b/h Attempts: 3 of 4 used Attempts: 1 of 4 used Attempts: 1 of 4 usedarrow_forwardA simple rankine ideal cycle with water as the working fluid. Twenty kilograms of steam enters the turbine at 7.1111 MPa and 500.1111 oC and is cooled in the condenser at a pressure of 10.1111 KPa by running cooling water from a lake through the tubes of the condenser at rate of 2000 kg. Show the T-s diagram and schematic of simple rankine cycle. For cycle determin (a) the turbine work, (b) the heat added, (c) the temperature rise of the cooling water, (d) the thermal efficiency of the cycle. For engine, determine (e) the heat added, (f) the thermal efficiency of the engine, and (g) Draw the T-s and schematic diagram.arrow_forward
- Steam is the working fluid in an actual Rankine cycle. Steam enters the turbine at 8.0 MPa and 550 deg. C; and saturated liquid exits the condenser at a pressure of 0.008 MPa. The net power output of the cycle is 110 MW. The turbine and the pump each have an isentropic efficiency of 83% Illustrate and label the TS diagram and determine the cycle (a) the cycle thermal efficiency (b) the back work ratio (c)the mass flow rate of the steam, in kg/h, (d) the rate of heat transfer into the working fluid as it passes through the boiler, in MW, (e) the rate of heat transfer, from the condensing steam, as it passes through the condenser, in MW, (f) the mass flow rate of the condenser cooling water, in kg/hr., if cooling water enters the condenser at 15 deg. C and exits at 35 deg. C.arrow_forwardA Carnot power cycle uses water as the working fluid. The boiler operates at a pressure of 2000 kPa and the condenser operates at 100 kPa. Saturated water enters the boiler and saturated vapor leaves the boiler. a. Calculate the heat transfer in the boiler and the condenser as well as the useful work of the cycle. b. Calculate the useful work extracted from the turbine and the work spent on the pump c. Determine the efficiency of the cycle using the definition of the Carnot cycle as well as using the definition of thermodynamic cycles d. Calculate the process efficiency of the pump and the turbine.arrow_forward10-1 to 10-2 Carnot and Rankine Cycles A simple ideal Rankine cycle that uses water as the working fluid operates its condenser at 30°C and its boiler at 250°C. Calculate the work produced by the turbine, the heat supplied in the boiler, and the thermal efficiency of this cycle when the steam enters the turbine without any superheating. Use steam tables.arrow_forward
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