SONNTAG/BORGNAKKE
STUDY PROBLEM 11-1
CHAPTER 11 STUDY PROBLEMS POWER AND REFRIGERATION SYSTEMS
The steam power plant, Rankine cycle The reheat cycle and feedwater heaters The gas turbine, Brayton cycle, jet engine Reciprocating engine cycles, Otto, Diese
ME 336 EXAM 1, FEBRUARY 19, 2007 C. BORGNAKKE, ME Problem 1 (30 Points) Superheated steam at 400 kPa, 250oC is flowing at 2 kg/min into a desuperheater chamber where a flow of saturated liquid water at 400 kPa is added in another line so the output flow i
CHAPTER 7 STUDY PROBLEMS THE SECOND LAW OF THERMODYNAMICS
Heat engines and refrigerators The second law of thermodynamics The reversible and irreversible process The Carnot cycle and its efficiency The thermodynamic and ideal gas temperature scales Real
11.72 A Brayton cycle produces 14 MW with an inlet state of 17 C, 100 kPa, and a compression ratio of 16:1. The heat added in the combustion is 960 kJ/kg. What are the highest temperature and the mass flow rate of air, assuming cold air properties? Soluti
ME 336 HW SET 2, C. BORGNAKKE, ME 5.46 A 10-L rigid tank contains R-410a at 10C, 80% quality. A 10-A electric current (from a 6-V battery) is passed through a resistor inside the tank for 10 min, after which the R-410a temperature is 40C. What was the hea
ME 336 HW SET 1 C. BORGNAKKE, ME 2.e A car tire gauge indicates 195 kPa; what is the air pressure inside? The pressure you read on the gauge is a gauge pressure, P, so the absolute pressure is found as P = Po + P = 101 + 195 = 296 kPa 3.10 Why are most of
CHAPTER 8 STUDY PROBLEMS ENTROPY
The inequality of Clausius The property entropy Entropy changes in processes Entropy generation Entropy changes for solids and liquids Entropy changes for an ideal gas The reversible polytropic process
SONNTAG BORGNAKKE V
CHAPTER 9 STUDY PROBLEMS SECOND-LAW ANALYSIS FOR A CONTROL VOLUME
The entropy equation for a control volume The steady state and the transient process The reversible steady state process Principle of the increase of entropy Efficiency
SONNTAG BORGNAKKE V
ME 336 EXTRA EXAMPLES 14.49 In a new high-efficiency furnace, natural gas, assumed to be 90% methane and 10% ethane (by volume) and 110% theoretical air each enter at 25C, 100 kPa, and the products (assumed to be 100% gaseous) exit the furnace at 40C, 100
ME 336 EXAM 1, OCT 14, 2008 C. BORGNAKKE, ME
Problem 1 [30 Points] A balloon is filled with air from a line at 200 kPa, 300 K to a final state of 110 kPa, 300 K with a mass of 0.1 kg air. Assume the pressure is proportional to the balloon volume as: P = 1
ME 336 EXAM 2, NOVEMBER 25, 2008 C. BORGNAKKE, ME Dept. Problem 1 [40 Points] A Brayton cycle has the inlet at 290 K, 100 kPa and uses a compression ratio of 12:1. It has the highest temperature of 1600 K and employs an ideal regenerator. Use cold air pro
ME 336 EXAM 2, MARCH 24, 2006 C. BORGNAKKE, ME Dept. Problem 1 [40 Points] A low T application runs a powerplant with R-22 having a high pressure of 2000 kPa. The boiler exit is at 100 C and the condenser operates at -40.8 C. There is one open feedwater h
ME 336 FINAL EXAM, DECEMBER 21, 2004 C. BORGNAKKE, ME DEPT Problem 1 (35 Points) Ethanol, C2H5OH, is burned in a steady state burner with stoichiometric air at Po, To. The ethanol is flowing, 0.05 kg/s, as a liquid at To to a carburetor where it is mixed
ME 336 EXAM 2, NOVEMBER 21, 2000 C. BORGNAKKE, ME Dept. Problem 1 [40 Points] The U of M power plant feeds 25 kg/s steam at 3 MPa, 500 C to the turbine. The condenser temperature is 35 C. Assume the plant operates one open feedwater heater at 150 kPa, whe
ME 336 EXAM 1, OCTOBER 10, 2002 C. BORGNAKKE, ME Problem 1 (30 Points) A piston cylinder setup has 2.5 kg of ammonia at 50 kPa and 20C. Now it is heated to 50C at constant pressure through the bottom of the cylinder from hot gases at 200 C. a) Find the he
Sonntag/Borgnakke
Study Problems Chapter 14
CHAPTER 14 STUDY PROBLEMS COMBUSTION
Introduction and definitions Combustion of hydrocarbon fuels The energy equation The entropy equation
SONNTAG BORGNAKKE VAN WYLEN
FUNDAMENTALS
of
Thermodynamics
Sixth Editio
Sonntag/Borgnakke
Study problems chapter 12
CHAPTER 12 STUDY PROBLEMS MIXTURES
Mixtures of ideal gases Moist air The psychrometric chart
SONNTAG BORGNAKKE VAN WYLEN
FUNDAMENTALS
of
Thermodynamics
Sixth Edition
Sonntag/Borgnakke 12.1 Mixing in a rigid tan
ME 487 Assignment 1
1.
Given
E L = aLj b
RL = a
v j
Derive proof:
L v b 2 A jA
E L = aLj b
J=I/A
v j
EL = aL
I vA b I A
Divide by I and Multiply last term by A/A
aL vA2 b 2 EL = I A L v RL = a b 2 A jA
2.
Given
Ho = Ha + HL
1 v= (j + vH L ) Derive Ho
Proo