THERMODYNAMICS (LL)-W/ACCESS >IP<
9th Edition
ISBN: 9781260666557
Author: CENGEL
Publisher: MCG CUSTOM
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Chapter 10.9, Problem 32P
How do the following quantities change when a simple ideal Rankine cycle is modified with reheating? Assume the mass flow rate is maintained the same.
Pump work input: (a) increases, (b) decreases, (c) remains the same
Turbine work output: (a) increases, (b) decreases, (c) remains the same
Heat supplied: (a) increases, (b) decreases, (c) remains the same
Heat rejected: (a) increases, (b) decreases, (c) remains the same Moisture content at turbine exit: (a) increases, (b) decreases, (c) remains the same
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efficiency, and (c) the combined engine efficiency.
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(4) A turbine receives steam at 10 MPa, 600°C and exhaust it at 0.2 MPa, (a) for the ideal Rankine engine
Known: The data provided at the principal states of a thermal power plant. Assume an Ideal Rankine Cycle.
(a) Explain about the general theory about the thermal power plant?
(b) Formulate to determine the work done by the pump, and also formulate the work done by the turbine?
(c) Evaluate the amount of heat supplied to the steam, and also determine the thermal efficiency of the cycle?
Conditions: The steam enters into the turbine at a Pressure of 24 bar & 400°C and the exhaust steam is enter
into the condenser at a pressure of 0.1 bar.
Scheme and given data:
Boiler
24 bar
& 400°C
Turbine
0.1 bar
Condenser
1. Why is excessive moisture in steam undesirable in steam turbines? What is the highest
moisture content allowed?
2. Why is the Carnot cycle not a realistic model for steam power plants?
3. Consider a simple ideal Rankine cycle with fixed turbine inlet conditions. What is the
effect of lowering the condenser pressure on
Pump work input: (a) increases, (b) decreases,
(c) remains the same
(a) increases, (b) decreases,
(c) remains the same
(a) increases, (b) decreases,
(c) remains the same
(a) increases, (b) decreases,
(c) remains the same
(a) increases, (b) decreases,
(c) remains the same
(a) increases, (b) decreases,
Turbine work
output:
Heat supplied:
Heat rejected:
Cycle efficiency:
Moisture content
at turbine exit: (c) remains the same
4. Consider a simple ideal Rankine cycle with fixed boiler and condenser pressures. What
is the effect of superheating the steam to a higher temperature on
Pump work input: (a) increases, (b) decreases,
(c) remains the same
(a) increases, (b)…
Chapter 10 Solutions
THERMODYNAMICS (LL)-W/ACCESS >IP<
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
- (a) What is the working fluid for Rankine cycle? (b) Describe the main characteristics of a Rankine cycle. (c) Draw the four components of a Rankine cycle. (d) Draw the "temperature-entropy" diagram that represents the cycle. (e) The maximal temperature in a Rankine cycle is limited now by metallurgical conditions, presently the highest steam temperature at the turbine is around 620 °C. Calculate the upper limit of a heat engine i.e. Carnot efficiency (%) if the environment temperature is 20 °C.arrow_forwardCan you briefly define the Stirling cycle and write down its biggest message?arrow_forwardIn an ideal Rankine Cycle, steam at 5 MPa and 500 °C enters the turbine and after expansion exits as saturated vapor. For 110,000 kg/hr of sream, find: a) Ideal power output of the Turbine (kW), b) Power to drive the pump (kW), c) Rate of Heat Added (kW), d) thermal efficiency of cycle and engine, e) steam rate of the cycle and engine, f) Heat Ratearrow_forward
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- On the diagram below sketch a basic Rankine cycle with superheating. Assume that there are irrevesibilities in the turbine and pump. Identify the device associate with each process. Make sure to label: the states and include important features, e.g. lines of constant temperature, volume, pressure, entropy, vapor dome, etc.arrow_forwardDescribe the Carnot cycle.arrow_forwardIDEAL RANKINE CYCLE: In an ideal Rankine Cycle, steam at 5 MPaa and 500 o C enters the turbine and expands 300 KPaa. For 110,000 kg/hr of steam, find: a) Ideal power output of the Turbine (kW), b) Power to drive the pump (kW), c) Rate of Heat Added (kW), d) thermal efficiency of cycle and engine, e) steam rate of the cycle and engine, f) Heat Rate (PLEASE SHOW COMPLETE SOLUTION AND ENCLOSE ALL THE FINAL ANSWERS ROUNDED OFF TO THE 4TH DECIMAL)arrow_forward
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