# 20 m neon m propane 20

Save this PDF as:

Size: px
Start display at page:

## Transcription

1 Problems with solutions:. A -m 3 tank is filled with a gas at room temperature 0 C and pressure 00 Kpa. How much mass is there if the gas is a) Air b) Neon, or c) Propane? Given: T73K; P00KPa; M air 9; M neon 0; M propane 44; m P V M R T m air m neon Kg 9 44 m propane Kg 0 Kg

2 . A cylinder has a thick piston initially held by a pin as shown in fig below. The cylinder contains carbon dioxide at 00 Kpa and ambient temperature of 90 k. the metal piston has a density of 8000 Kg/m 3 and the atmospheric pressure is 0 Kpa. The pin is now removed, allowing the piston to move and after a while the gas returns to ambient temperature. Is the piston against the stops? Schematic: 50 mm Pin 00 mm Co 00 mm 00 mm Given: P00kpa; 3 3 V gas π m : T90 k: V piston : 4 m piston kg Pressure exerted by piston π 0. 4 When the metal pin is removed and gas 7848 kpa T90 k v π v m p 33kpa.8 m 3 Total pressure due to piston +weight of piston kpa

3 pa Conclusion: Pressure is grater than this value. Therefore the piston is resting against the stops.

4 3. A cylindrical gas tank m long, inside diameter of 0cm, is evacuated and then filled with carbon dioxide gas at 5 0 c.to what pressure should it be charged if there should be. kg of carbon dioxide? T 98 k: m.kg: p.. 5Mpa 44 π 0. 4

5 4. A -m 3 rigid tank with air Mpa, 400 K is connected to an air line as shown in fig: the valve is opened and air flows into the tank until the pressure reaches 5 Mpa, at which point the valve is closed and the temperature is inside is 450 K. a. What is the mass of air in the tank before and after the process? b. The tank is eventually cools to room temperature, 300 K. what is the pressure inside the tank then? P0 6 Pa: P Pa: T 400K: T 450 k m 8. 7Kg m 38. 8Kg P Mpa 9

6 5. A hollow metal sphere of 50-mm inside diameter is weighed on a precision beam balance when evacuated and again after being filled to 875 Kpa with an unknown gas. The difference in mass is Kg, and the temperature is 5 0 c. What is the gas, assuming it is a pure substance? m0.005kg: P Kpa: T 98 K M π The gas will be helium.

7 6. Two tanks are connected as shown in fig, both containing water. Tank A is at 00 Kpa,νm 3 and tank B contains 3.5 Kg at 0.5 Mp, C. The valve is now opened and the two come to a uniform state. Find the specific volume. Schematic: Known: Vm 3 M Kg ν f m 3 /Kg ν g m3/kg T400 0 C m3.5 Kg Therefore it is a mixture of steam and water. Final volume m 3 3 ν0.678m /Kg X0.678*3.5.6 Kg Final volume Kg Final specific volume 3.6/ m 3 /Kg m ina kg

8 .6 m inb Kg

9 7.. The valve is now opened and saturated vapor flows from A to B until the pressure in B Consider two tanks, A and B, connected by a valve as shown in fig. Each has a volume of 00 L and tank A has R- at 5 C, 0 % liquid and 90% vapor by volume, while tank B is evacuated has reached that in A, at which point the valve is closed. This process occurs slowly such that all temperatures stay at 5 C throughout the process. How much has the quality changed in tank A during the process? Given R- P 65.6 KPa ν g m3/kg ν f 0.763*0-3 m 3 /Kg m * x Amount of vapor needed to fill tank B Kg

10 Reduction in mass liquid in tank A increase in mass of vapor in B m f Kg This reduction of mass makes liquid to occupy m m 3 Volume of vapor L Mg Kg 6.96 x Δx. 6.6 %

11 8. A linear spring, F K s (x-x 0 ), with spring constant K s 500 N/m, is stretched until it is 00 mm long. Find the required force and work input. FK s (x-x o) x- x 0 0. m K s 500 N/m F 50 N W FS

12 9. A piston / cylinder arrangement shown in fig. Initially contains air at 50 kpa, 400 C. The setup is allowed to cool at ambient temperature of 0 C. a. Is the piston resting on the stops in the final state? What is the final pressure in the cylinder? b. That is the specific work done by the air during the process? Schematic: p Pa T 673 K T 93 K P V P V T T T 93. If it is a constant pressure process, V V A 0. 87m T 673 Since it is less than weight of the stops, the piston rests on stops.

13 V V V T T T T V p 3 T 3 p T K P T P KPa T Therefore W A 834 A KJ / Kg

14 0. A cylinder, A cyl 7.0cm has two pistons mounted, the upper one, m p 00kg, initially resting on the stops. The lower piston, m p 0kg, has kg water below it, with a spring in vacuum connecting he two pistons. The spring force fore is zero when the lower piston stands at the bottom, and when the lower piston hits the stops the volume is 0.3 m 3. The water, initially at 50 kpa, V m 3, is then heated to saturated vapor. a. Find the initial temperature and the pressure that will lift the upper piston. b. Find the final T, P, v and work done by the water. Schematic:

15 .5*0 6 50* There are the following stages: () Initially water pressure 50 kpa results in some compression of springs. Force N Specific volume of water / m 3 /kg Height of water surface m Spring stiffness N / m () As heat is supplied, pressure of water increases and is balanced by spring reaction due to due to K8. This will occur till the spring reaction Force due to piston + atm pressure N

16 05 This will result when S 80.34m.95 At this average V m 3 05 P Mpa (3) From then on it will be a constant pressure process till the lower piston hits the stopper. Process -3 At this stage V 0.3 m 3 Specific volume 0.5 m 3 /kg But saturated vapor specific volume at.5 Mpa m 3 / kg V m 3 (4) Therefore the steam gets superheated 3-4 Work done p (v 4 v )+ (p +p ) (v -v ) ( ) + ( )( ) J 79 KJ

17 . Two kilograms of water at 500 kpa, 0 C are heated in a constant pressure process (SSSF) to 700 C. Find the best estimate for the heat transfer. Q m [(h -h )] [( )] 743 KJ Chart data does not cover the range. Approximately h 6456KJ/kg; h 85 KJ; 500 kpa 30 C h C h Δh 48.6 kj/kg 6 kj/kg /00 C

18 . Nitrogen gas flows into a convergent nozzle at 00 kpa, 400 K and very low velocity. It flows out of the nozzle at 00 kpa, 330 K. If the nozzle is insulated, find the exit velocity. s m h h c h h c c h c h / 38.8 (

19 3. An insulated chamber receives kg/s R-34a at MPa, 00 c in a line with a low velocity. Another line with R-34a as saturated liquid, 600c flows through a valve to the mixing chamber at Mpa after the valve. The exit flow is saturated vapor at Mpa flowing at 0-m/s. Find the flow rate for the second line. Q0; W0; SFEE 0m 3 (h 3 )+c 3 / (m h +m h ) m g/s m? m 3? h (Mpa, 00 C) J/kg h (saturated liquid 60 C J/kg) h 3 ( saturated vapor Mpa J/kg) 400 m m (87790) m m.458m m m 3 +m 0.458m m kg/s ; m kg/s

20 4. A small, high-speed turbine operating on compressed air produces a power output of 00W. The inlet state is 400 kpa,50 C, and the exit state is 50 kpa-30 C. Assuming the velocities to be low and the process to be adiabatic, find the required mass flow rate of air through the turbine. 400kPa T33K 50kPa T43K. W 00W. SFEE : -00 m [h h ] h 43.Cp h 33.Cp. m -00 Cp(43-33). m. m Cp kg/s

21 5. The compressor of a large gas turbine receives air from the ambient at 95 kpa, 0 C, with a low velocity. At the compressor discharge, air exists at.5 MPa, 430 C, with a velocity of 90-m/s. The power input to the compressor is 5000 kw. Determine the mass flow rate of air through the unit. Assume that compressor is insulated. Q0;. SFEE: m [000* ] m [ ]. m.3 kg/s

22 6. In a steam power plant MW is added at 700 C in the boiler, 0.58 MW is taken at out at 40 C in the condenser, and the pump work is 0.0 MW. Find the plant thermal efficiency. Assuming the same pump work and heat transfer to the boiler is given, how much turbine power could be produced if the plant were running in a Carnot cycle? MW 0.4 MW 0.58MW 0.0MW η Theoretically MW could have been generated. So 0K on Carnot cycle Power W

23 7. A car engine burns 5 kg fuel at 500 K and rejects energy into the radiator and exhaust at an average temperature of 750 K. If the fuel provides kj/kg, what is the maximum amount of work the engine provide? 500K Q5*40,000kJ W 750K η T T T 50 % W 0,000*50 5 KJ00MJ

24 8. At certain locations geothermal energy in underground water is available and used as the energy source for a power plant. Consider a supply of saturated liquid water at 50 C. What is the maximum possible thermal efficiency of a cyclic heat engine using the source of energy with the ambient at 0 C? Would it be better to locate a source of saturated vapor at 50 C than to use the saturated liquid at 50 C? η max or30.7%

25 9. An air conditioner provides kg/s of air at 5 C cooled from outside atmospheric air at 35 C. Estimate the amount of power needed to operate the air conditioner. Clearly state all the assumptions made. assume air to be a perfect gas cop W 390W 4.4

26 0. We propose to heat a house in the winter with a heat pump. The house is to be maintained at 0 0 C at all times. When the ambient temperature outside drops at 0 0 C that rate at which heat is lost from the house is estimated to be 5 KW. What is the minimum electrical power required to drive the heat pump? cop Hp W KW

27 .A house hold freezer operates in room at 0 C. Heat must be transferred from the cold space at rate of kw to maintain its temperature at 30 C. What is the theoretically smallest (power) motor required to operating this freezer? cop W kw

28 . Differences in surface water and deep-water temperature can be utilized for power genetration.it is proposed to construct a cyclic heat engine that will operate near Hawaii, where the ocean temperature is 0 0 C near the surface and 5 0 C at some depth. What is the possible thermal efficiency of such a heat engine? η max % ]

29 3. We wish to produce refrigeration at 30 0 C. A reservoir, shown in fig is available at 00 0 C and the ambient temperature is 30 0 C. This, work can be done by a cyclic heat engine operating between the 00 0 C reservoir and the ambient. This work is used to drive the refrigerator. Determine the ratio of heat transferred from 00 0 C reservoir to the heat transferred from the 30 0 C reservoir, assuming all process are reversible. 473K 303K Q W Q /Q? Q 303K 43K η cop W Q Q W W Q

30 Q Q Q Q

31 4. Nitrogen at 600 kpa, 7 C is in a 0.5m 3 -insulated tank connected to pipe with a valve to a second insulated initially empty tank 0.5 m 3. The valve is opened and nitrogen fills both the tanks. Find the final pressure and temperature and the entropy generation this process causes. Why is the process irreversible? Final pressure 300 kpa Final temperature7 kpa as it will be a throttling process and h is constant. T constant for ideal gas m kg Δs for an isothermal process V mr ln V m J/k

32 5. A mass of a kg of air contained in a cylinder at.5mpa, 00K, expands in a reversible isothermal process to a volume 0 times larger. Calculate the heat transfer during the process and the change of entropy of the air. V 0V

33 Q W p v v ln v For isothermal process v mrt ln v 834 * *000 * ln J 9 WQ for an isothermal process, TΔs6607; Δs660J/K

34 6. A rigid tank contains kg of air at 00 kpa and ambient temperature, 0 C. An electric current now passes through a resistor inside the tank. After a total of 00 kj of electrical work has crossed the boundary, the air temperature inside is 80 C, is this possible? kg 00 kpa 0 C Q00*0 3 J It is a constant volume process. Q mc v Λ T J Q given 0,000 Joules only. Therefore not possible because some could have been lost through the wall as they are not insulted. 353 mcvdt 353 ΔS air 703ln 6.93J / K T Δ S sun 34.3 J/ K 93 Δ system + Δ sun < 0 Hence not possible. It should be >0;

35 7. A cylinder/ piston contain 00 L of air at 0 kpa, 5 C. The air is compressed in reversible polytrophic process to a final state of 800 kpa, 000C. Assume the heat transfer is with the ambient at 5 C and determine the polytrophic exponent n and the final volume of air. Find the work done by the air, the heat transfer and the total entropy generation for the process. V0.m 3 P0*0 3 Pa T98K P800kPa T00 C p V T p p V V 3 3 V 0. 0 T p p Vγ V V 7.73 p γ (4.545 ) V γ γ γ pv pv W 90J n.3 m 3

36 J Q U W Q J U K J S kg m kgk J T T c V V R S v ) ( / / ln ln ln ln 3 Δ Δ Δ + + Δ

37 8. A closed, partly insulated cylinder divided by an insulated piston contains air in one side and water on the other, as shown in fig. There is no insulation on the end containing water. Each volume is initially 00L, with the air at 40 C and the water at 90 C, quality 0 %. Heat is slowly transferred to the water, until a final pressure of 500kPa. Calculate the amount of heat transferred. AA A AIR H O State : Vair0.m3 V water 0.m 3 Total volume0.m 3 t air 40 C x0. t water 90 C Initial pressure of air saturation pressure of water at 90 C 70.4kPa v g /90 C m 3 /kg v f /90 C m 3 /kg V xv g +(-x)v f 0.* * m 3 /kg V0.m 3 V 0. m water 0.4kg ν 0.37 AIR H O State : Q Assume that compression of air is reversible. It is adiabatic p γ γ V pv

38 p.4 γ 70.4 V p 500 V 0 m 3 Volume of water chamber m m / kg Specific volume v / m kg g 500kPa / Therefore steam is in superheated state.

39

### UNIT-I. Workdone = HS HR 8.2 = 25 HR. Heat rejected (HR) = 20.8 kw ----

UNIT-I. A heat engine receives heat at the rate of 500 kj/min and gives an output of 8.2 kw. Determine the thermal efficiency and the rate of heat rejection. Given: Heat received by engine (HS) Work output

### 7 90 Water enters the pump of a steam power plant as saturated liquid at 20 kpa at a rate of 45 kg/s and exits at 6 MPa. Neglecting the changes in kin

7 58 An adiabatic pump is to be used to compress saturated liquid water at 10 kpa to a pressure to 15 MPa in a reversible manner. Determine the work input using (a) entropy data from the compressed liquid

### Sheet 5:Chapter 5 5 1C Name four physical quantities that are conserved and two quantities that are not conserved during a process.

Thermo 1 (MEP 261) Thermodynamics An Engineering Approach Yunus A. Cengel & Michael A. Boles 7 th Edition, McGraw-Hill Companies, ISBN-978-0-07-352932-5, 2008 Sheet 5:Chapter 5 5 1C Name four physical

### ME 201 Thermodynamics

ME 0 Thermodynamics Second Law Practice Problems. Ideally, which fluid can do more work: air at 600 psia and 600 F or steam at 600 psia and 600 F The maximum work a substance can do is given by its availablity.

### ES-7A Thermodynamics HW 3: 6-31, 38, 39, 53, 73, 76, 82, 86, 130, 131 Spring 2003 Page 1 of 5

ES-7A hermodynamics HW : 6-, 8, 9, 5, 7, 76, 8, 86, 0, Spring 00 Page of 5 6- Entropy change of water Given: Radiator with 0 L of superheated water vapor at 00 kpa and 00 C. Inlet and exit valves are closed,

### CHAPTER 25 IDEAL GAS LAWS

EXERCISE 139, Page 303 CHAPTER 5 IDEAL GAS LAWS 1. The pressure of a mass of gas is increased from 150 kpa to 750 kpa at constant temperature. Determine the final volume of the gas, if its initial volume

### Entropy of a liquid or a solid

Entropy of a liquid or a solid 8.75 A piston cylinder has constant pressure of 000 kpa with water at 0 o C. It is now heated up to 00 o C. Find the heat transfer and the entropy change using the steam

### 4.28 A car drives for half an hour at constant speed and uses 30 MJ over a distance of 40 km. What was the traction force to the road and its speed?

4.8 A car drives for half an hour at constant speed and uses 30 MJ over a distance of 40 km. What was the traction force to the road and its speed? We need to relate the work to the force and distance

### UNIT-III PROPERTIES OF PURE SUBSTANCE AND STEAM POWER CYCLE

UNIT-III PROPERTIES OF PURE SUBSTANCE AND STEAM POWER CYCLE Pure Substance A Pure substance is defined as a homogeneous material, which retains its chemical composition even though there may be a change

### - Know basic of refrigeration - Able to analyze the efficiency of refrigeration system -

Refrigeration cycle Objectives - Know basic of refrigeration - Able to analyze the efficiency of refrigeration system - contents Ideal Vapor-Compression Refrigeration Cycle Actual Vapor-Compression Refrigeration

### THERMODYNAMICS NOTES - BOOK 2 OF 2

THERMODYNAMICS & FLUIDS (Thermodynamics level 1\Thermo & Fluids Module -Thermo Book 2-Contents-December 07.doc) UFMEQU-20-1 THERMODYNAMICS NOTES - BOOK 2 OF 2 Students must read through these notes and

### AP Physics Problems Kinetic Theory, Heat, and Thermodynamics

AP Physics Problems Kinetic Theory, Heat, and Thermodynamics 1. 1974-6 (KT & TD) One-tenth of a mole of an ideal monatomic gas undergoes a process described by the straight-line path AB shown in the p-v

### Chapter 6 Energy Equation for a Control Volume

Chapter 6 Energy Equation for a Control Volume Conservation of Mass and the Control Volume Closed systems: The mass of the system remain constant during a process. Control volumes: Mass can cross the boundaries,

### Practice Problems on Conservation of Energy. heat loss of 50,000 kj/hr. house maintained at 22 C

COE_10 A passive solar house that is losing heat to the outdoors at an average rate of 50,000 kj/hr is maintained at 22 C at all times during a winter night for 10 hr. The house is to be heated by 50 glass

### ES-7A Thermodynamics HW 1: 2-30, 32, 52, 75, 121, 125; 3-18, 24, 29, 88 Spring 2003 Page 1 of 6

Spring 2003 Page 1 of 6 2-30 Steam Tables Given: Property table for H 2 O Find: Complete the table. T ( C) P (kpa) h (kj/kg) x phase description a) 120.23 200 2046.03 0.7 saturated mixture b) 140 361.3

### FE Thermodynamics Review. Dr. David R. Muñoz

FE Thermodynamics Review Dr. David R. Muñoz Definitions System collection of matter which we are interested in studying. Surroundings everything outside of the system. Universe system + surroundings. Pure

### 1.5. Which thermodynamic property is introduced using the zeroth law of thermodynamics?

CHAPTER INTRODUCTION AND BASIC PRINCIPLES. (Tutorial). Determine if the following properties of the system are intensive or extensive properties: Property Intensive Extensive Volume Density Conductivity

### SOLUTION MANUAL SI UNIT PROBLEMS CHAPTER 9 SONNTAG BORGNAKKE VAN WYLEN. FUNDAMENTALS of. Thermodynamics. Sixth Edition

SOLUTION MANUAL SI UNIT PROBLEMS CHAPTER 9 SONNTAG BORGNAKKE VAN WYLEN FUNDAMENTALS of Thermodynamics Sixth Edition CONTENT SUBSECTION PROB NO. Correspondence table Concept-Study Guide Problems -20 Steady

### THE UNIVERSITY OF TRINIDAD & TOBAGO

THE UNIVERSITY OF TRINIDAD & TOBAGO FINAL ASSESSMENT/EXAMINATIONS JANUARY/APRIL 2013 Course Code and Title: Programme: THRM3001 Engineering Thermodynamics II Bachelor of Applied Sciences Date and Time:

### ME 6404 THERMAL ENGINEERING. Part-B (16Marks questions)

ME 6404 THERMAL ENGINEERING Part-B (16Marks questions) 1. Drive and expression for the air standard efficiency of Otto cycle in terms of volume ratio. (16) 2. Drive an expression for the air standard efficiency

### Final Exam Review Questions PHY Final Chapters

Final Exam Review Questions PHY 2425 - Final Chapters Section: 17 1 Topic: Thermal Equilibrium and Temperature Type: Numerical 12 A temperature of 14ºF is equivalent to A) 10ºC B) 7.77ºC C) 25.5ºC D) 26.7ºC

### CO 2 41.2 MPa (abs) 20 C

comp_02 A CO 2 cartridge is used to propel a small rocket cart. Compressed CO 2, stored at a pressure of 41.2 MPa (abs) and a temperature of 20 C, is expanded through a smoothly contoured converging nozzle

### Energy : ṁ (h i + ½V i 2 ) = ṁ(h e + ½V e 2 ) Due to high T take h from table A.7.1

6.33 In a jet engine a flow of air at 000 K, 00 kpa and 30 m/s enters a nozzle, as shown in Fig. P6.33, where the air exits at 850 K, 90 kpa. What is the exit velocity assuming no heat loss? C.V. nozzle.

### δq T +S i S e +S gen S 2 S 1 = δq T + S i S 0 S 2 S 1 = 0 m A (s 2 s 1 ) A +m B (s 2 s 1 ) B = 0 TB,2 + Rln v A,1 +ln TB,1 0 = m A C v ln +C v ln

Two rigid tanks each contain 0 of N 2 gas at 000 K, 500 kpa. They are now thermally connected to a reversible heat pump, which heats one and cools the other with no heat transfer to the surroundings. When

### FUNDAMENTALS OF ENGINEERING THERMODYNAMICS

FUNDAMENTALS OF ENGINEERING THERMODYNAMICS System: Quantity of matter (constant mass) or region in space (constant volume) chosen for study. Closed system: Can exchange energy but not mass; mass is constant

### ESO 201A/202. End Sem Exam 120 Marks 3 h 19 Nov Roll No. Name Section

ESO 201A/202 End Sem Exam 120 Marks 3 h 19 Nov 2014 Roll No. Name Section Answer Questions 1 and 2 on the Question Paper itself. Answer Question 3, 4 and 5 on the Answer Booklet provided. At the end of

### APPLIED THERMODYNAMICS TUTORIAL 1 REVISION OF ISENTROPIC EFFICIENCY ADVANCED STEAM CYCLES

APPLIED THERMODYNAMICS TUTORIAL 1 REVISION OF ISENTROPIC EFFICIENCY ADVANCED STEAM CYCLES INTRODUCTION This tutorial is designed for students wishing to extend their knowledge of thermodynamics to a more

### The thermal cycle with the highest theoretical efficiency is the Carnot cycle, consisting of two isotherms and two adiabats.

Carnot to Reality The thermal cycle with the highest theoretical efficiency is the Carnot cycle, consisting of two isotherms and two adiabats. η = W/Q in Carnot's theorem states that for a heat engine

### Chapter 11. Refrigeration Cycles

Chapter 11 Refrigeration Cycles The vapor compression refrigeration cycle is a common method for transferring heat from a low temperature space to a high temperature space. The figures below show the objectives

### THERMODYNAMICS TUTORIAL 5 HEAT PUMPS AND REFRIGERATION. On completion of this tutorial you should be able to do the following.

THERMODYNAMICS TUTORIAL 5 HEAT PUMPS AND REFRIGERATION On completion of this tutorial you should be able to do the following. Discuss the merits of different refrigerants. Use thermodynamic tables for

### CHAPTER 7 THE SECOND LAW OF THERMODYNAMICS. Blank

CHAPTER 7 THE SECOND LAW OF THERMODYNAMICS Blank SONNTAG/BORGNAKKE STUDY PROBLEM 7-1 7.1 A car engine and its fuel consumption A car engine produces 136 hp on the output shaft with a thermal efficiency

### AREN 2110, Fall 2006 Homework #1 Solutions

REN 0, Fall 006 Homework # Solutions -C he radiator should be analyzed as an open system since mass is crossing the boundaries of the system. -0C For a system to be in thermodynamic equilibrium, the temperature

### Given: P A, V A, v A, m B, P B, and T B. Find: Final specific volume Solution: v final = V final m final m A +m B

Two tanks are connected as shown in the figure, both containing water. Tank A is at 200 kpa, v A 0.5 m 3 /, V A 1 m 3, and tank B contains 3.5 at 0.5 MPa and 400 C. The valve is now opened and the two

### Physics Final Exam Chapter 13 Review

Physics 1401 - Final Exam Chapter 13 Review 11. The coefficient of linear expansion of steel is 12 10 6 /C. A railroad track is made of individual rails of steel 1.0 km in length. By what length would

### Sheet 8:Chapter C It is less than the thermal efficiency of a Carnot cycle.

Thermo 1 (MEP 261) Thermodynamics An Engineering Approach Yunus A. Cengel & Michael A. Boles 7 th Edition, McGraw-Hill Companies, ISBN-978-0-07-352932-5, 2008 Sheet 8:Chapter 9 9 2C How does the thermal

### Chapter 11, Problem 18.

Chapter 11, Problem 18. Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.14 MPa and 10 C at a rate of 0.12 kg/s, and it leaves at 0.7 MPa and 50 C. The refrigerant is

### UNIVERSITY ESSAY QUESTIONS:

UNIT I 1. What is a thermodynamic cycle? 2. What is meant by air standard cycle? 3. Name the various gas power cycles". 4. What are the assumptions made for air standard cycle analysis 5. Mention the various

### 256 Thermodynamics REFERENCES AND SUGGESTED READINGS PROBLEMS* Conservation of Mass

256 Thermodynamics unsteady-flow processes. During a steady-flow process, the fluid flows through the control volume steadily, experiencing no change with time at a fixed position. The mass and energy

### Thermodynamics - Example Problems Problems and Solutions

Thermodynamics - Example Problems Problems and Solutions 1 Examining a Power Plant Consider a power plant. At point 1 the working gas has a temperature of T = 25 C. The pressure is 1bar and the mass flow

### UNIT 2 REFRIGERATION CYCLE

UNIT 2 REFRIGERATION CYCLE Refrigeration Cycle Structure 2. Introduction Objectives 2.2 Vapour Compression Cycle 2.2. Simple Vapour Compression Refrigeration Cycle 2.2.2 Theoretical Vapour Compression

### The First Law of Thermodynamics: Closed Systems. Heat Transfer

The First Law of Thermodynamics: Closed Systems The first law of thermodynamics can be simply stated as follows: during an interaction between a system and its surroundings, the amount of energy gained

### 1. Why are the back work ratios relatively high in gas turbine engines? 2. What 4 processes make up the simple ideal Brayton cycle?

1. Why are the back work ratios relatively high in gas turbine engines? 2. What 4 processes make up the simple ideal Brayton cycle? 3. For fixed maximum and minimum temperatures, what are the effect of

### The Second Law of Thermodynamics

The Second aw of Thermodynamics The second law of thermodynamics asserts that processes occur in a certain direction and that the energy has quality as well as quantity. The first law places no restriction

### ENGINEERING COUNCIL CERTIFICATE LEVEL THERMODYNAMIC, FLUID AND PROCESS ENGINEERING C106 TUTORIAL 5 STEAM POWER CYCLES

ENGINEERING COUNCIL CERTIFICATE LEVEL THERMODYNAMIC, FLUID AND PROCESS ENGINEERING C106 TUTORIAL 5 STEAM POWER CYCLES When you have completed this tutorial you should be able to do the following. Explain

### 154 Thermodynamics REFERENCES AND SUGGESTED READINGS PROBLEMS* Pure Substances, Phase-Change Processes, Property Diagrams.

cen84959_ch03.qxd 4/1/05 12:31 PM Page 154 154 Thermodynamics REFERENCES AND SUGGESTED READINGS 1. ASHRAE Handbook of Fundamentals. SI version. Atlanta, GA: American Society of Heating, Refrigerating,

### Lesson 10 Vapour Compression Refrigeration Systems

Lesson 0 Vapour Compression Refrigeration Systems Version ME, II Kharagpur he specific objectives of the lesson: his lesson discusses the most commonly used refrigeration system, ie Vapour compression

### Thermodynamic cycle and machinery of. Vapor-compression. Heat pump and refrigerator

Thermodynamic cycle and machinery of Vapor-compression Heat pump and refrigerator Engineering Thermodynamics 2 Lab Report Maria Paknezhad March 15, 2006 Contents Introduction THEORY Ideal Vapor Compression

### Second Law of Thermodynamics

Thermodynamics T8 Second Law of Thermodynamics Learning Goal: To understand the implications of the second law of thermodynamics. The second law of thermodynamics explains the direction in which the thermodynamic

### MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

Exam 3 General Physics 202 Name 1) 550 g of water at 75eC are poured into an 855 g aluminum container with an initial temperature of 11eC. The specific heat of aluminum is 900 J/(kgœK). How much heat flows

### The final numerical answer given is correct but the math shown does not give that answer.

Note added to Homework set 7: The solution to Problem 16 has an error in it. The specific heat of water is listed as c 1 J/g K but should be c 4.186 J/g K The final numerical answer given is correct but

### Thermodynamics I Spring 1432/1433H (2011/2012H) Saturday, Wednesday 8:00am - 10:00am & Monday 8:00am - 9:00am MEP 261 Class ZA

Thermodynamics I Spring 1432/1433H (2011/2012H) Saturday, Wednesday 8:00am - 10:00am & Monday 8:00am - 9:00am MEP 261 Class ZA Dr. Walid A. Aissa Associate Professor, Mech. Engg. Dept. Faculty of Engineering

### Exam 4 -- PHYS 101. Name: Class: Date: Multiple Choice Identify the choice that best completes the statement or answers the question.

Name: Class: Date: Exam 4 -- PHYS 101 Multiple Choice Identify the choice that best completes the statement or answers the question. 1. A steel tape measure is marked such that it gives accurate measurements

### APPLIED THERMODYNAMICS. TUTORIAL No.3 GAS TURBINE POWER CYCLES. Revise gas expansions in turbines. Study the Joule cycle with friction.

APPLIED HERMODYNAMICS UORIAL No. GAS URBINE POWER CYCLES In this tutorial you will do the following. Revise gas expansions in turbines. Revise the Joule cycle. Study the Joule cycle with friction. Extend

### 10/26/10. Steam Tables. Sections Steam table. Class 25

Sections 7.4-6 Steam table Class 25 Steam Tables Tables B-5,B-6, B-7 Superheated steam look at p. 650 Steam is NOT an ideal gas What s the reference state for steam? Liquid water is fed to a boiler at

### The Second Law of Thermodynamics

Objectives MAE 320 - Chapter 6 The Second Law of Thermodynamics The content and the pictures are from the text book: Çengel, Y. A. and Boles, M. A., Thermodynamics: An Engineering Approach, McGraw-Hill,

### Heat Engines, Entropy, and the Second Law of Thermodynamics

2.2 This is the Nearest One Head 669 P U Z Z L E R The purpose of a refrigerator is to keep its contents cool. Beyond the attendant increase in your electricity bill, there is another good reason you should

### Engineering Software P.O. Box 2134, Kensington, MD 20891 Phone: (301) 919-9670 Web Site:

Engineering Software P.O. Box 2134, Kensington, MD 20891 Phone: (301) 919-9670 E-Mail: info@engineering-4e.com Web Site: http://www.engineering-4e.com Brayton Cycle (Gas Turbine) for Propulsion Application

### Energy in Thermal Processes: The First Law of Thermodynamics

Energy in Thermal Processes: The First Law of Thermodynamics 1. An insulated container half full of room temperature water is shaken vigorously for two minutes. What happens to the temperature of the water?

### Example 1. Solution: Diagram: Given: m = 1 kg P 1 = P 2 = 0.8 MPa = constant v 1 = m 3 /kg v 2 = m 3 /kg. Find:

Example 1 Problem Statement: A piston/cylinder device contains one kilogram of a substance at 0.8 MPa with a specific volume of 0.2608 m 3 /kg. The substance undergoes an isobaric process until its specific

### OUTCOME 2 INTERNAL COMBUSTION ENGINE PERFORMANCE. TUTORIAL No. 5 PERFORMANCE CHARACTERISTICS

UNIT 61: ENGINEERING THERMODYNAMICS Unit code: D/601/1410 QCF level: 5 Credit value: 15 OUTCOME 2 INTERNAL COMBUSTION ENGINE PERFORMANCE TUTORIAL No. 5 PERFORMANCE CHARACTERISTICS 2 Be able to evaluate

### 3.4 An external water tap has the valve activated by a long spindle so the closing mechanism is located well inside the wall. Why is that?

3.4 An external water tap has the ale actiated by a long spindle so the closing mechanism is located well inside the wall. Why is that? By haing the spindle inside the wall the coldest location with water

### Chapter 3. Properties of Pure Substances (Property Tables)

Chapter 3 Properties of Pure Substances (Property Tables) We now turn our attention to the concept of pure substances and the presentation of their data. Simple System A simple system is one in which the

### NAME: DATE: PHYSICS. Useful Data: Molar gas constant R = J mol -1 K HL Ideal Gas Law Questions

NAME: DATE: PHYSICS Useful Data: Molar gas constant R = 8.314 J mol -1 K -1 10.1 HL Ideal Gas Law Questions Avogadro s constant = 6.02 x 10 23 mol -1 Density of water = 1000.0 kg m -3 g = 9.81 N/kg 1)

### Problem Set 1 3.20 MIT Professor Gerbrand Ceder Fall 2003

LEVEL 1 PROBLEMS Problem Set 1 3.0 MIT Professor Gerbrand Ceder Fall 003 Problem 1.1 The internal energy per kg for a certain gas is given by U = 0. 17 T + C where U is in kj/kg, T is in Kelvin, and C

### Chapter 11 Heat Engines and the. Thermodynamics

Chapter 11 Heat Engines and the Second Law of Thermodynamics The laws of thermodynamics...are critical to making intelligent choices about energy in today s global economy. What Is a Heat Engine? How do

### NOTES ON VAPOR-COMPRESSION REFRIGERATION

NOTES ON VAPOR-COMPRESSION REFRIGERATION Introduction The purpose of this lecture is to review some of the background material required to undertake the refrigeration laboratory. The Thermodynamics of

### ME 6404 THERMAL ENGINEERING UNIT I. Part-A

UNIT I Part-A 1. For a given compression ratio and heat addition explain why otto cycle is more efficient than diesel cycle? 2. Explain the effect of pressure ratio on the net output and efficiency of

### Physics Assignment No 2 Chapter 20 The First Law of Thermodynamics Note: Answers are provided only to numerical problems.

Serway/Jewett: PSE 8e Problems Set Ch. 20-1 Physics 2326 - Assignment No 2 Chapter 20 The First Law of Thermodynamics Note: Answers are provided only to numerical problems. 1. How long would it take a

### Construction of separating calorimeter is as shown in figure:

1. Title: Measurement of dryness fraction by Separating Calorimeter, Throttling Calorimeter, Separating and Throttling Calorimeter. 2. Learning objectives: 2.1. Intellectual skills: a) Measurement of Dryness

### UNIT 5 REFRIGERATION SYSTEMS

UNIT REFRIGERATION SYSTEMS Refrigeration Systems Structure. Introduction Objectives. Vapour Compression Systems. Carnot Vapour Compression Systems. Limitations of Carnot Vapour Compression Systems with

### Lesson 12 Multi-Stage Vapour Compression Refrigeration Systems. Version 1 ME, IIT Kharagpur 1

Lesson Multi-Stage Vapour Compression Refrigeration Systems Version ME, IIT Kharagpur The objectives of this lesson are to: Discuss limitations of single stage vapour compression refrigeration systems

### 4.1 Introduction. 4.2 Work. Thermodynamics

Thermodynamics 4-1 Chapter 4 Thermodynamics 4.1 Introduction This chapter focusses on the turbine cycle:thermodynamics and heat engines. The objective is to provide enough understanding of the turbine

### Lesson 5 Review of fundamental principles Thermodynamics : Part II

Lesson 5 Review of fundamental principles Thermodynamics : Part II Version ME, IIT Kharagpur .The specific objectives are to:. State principles of evaluating thermodynamic properties of pure substances

### Physics 2326 - Assignment No: 3 Chapter 22 Heat Engines, Entropy and Second Law of Thermodynamics

Serway/Jewett: PSE 8e Problems Set Ch. 22-1 Physics 2326 - Assignment No: 3 Chapter 22 Heat Engines, Entropy and Second Law of Thermodynamics Objective Questions 1. A steam turbine operates at a boiler

### Lesson. 11 Vapour Compression Refrigeration Systems: Performance Aspects And Cycle Modifications. Version 1 ME, IIT Kharagpur 1

Lesson Vapour Compression Refrigeration Systems: Performance Aspects And Cycle Modifications Version ME, IIT Kharagpur The objectives of this lecture are to discuss. Performance aspects of SSS cycle and

### N 2 C balance: 3a = = 9.2 a = H CO = CO H 2. theo. A-F ratio =

15.26 Liquid propane is burned with dry air. A volumetric analysis of the products of combustion yields the following volume percent composition on a dry basis: 8.6% CO 2, 0.6% CO, 7.2% O 2 and 83.6% N

### Thermodynamics [ENGR 251] [Lyes KADEM 2007]

CHAPTER II Properties of Pure Substances II.1. What is a pure substance? A pure substance is defined as a substance that has a fixed chemical composition (example: water; Co 2 ; nitrogen; ). A mixture

### OUTCOME 4 STEAM AND GAS TURBINE POWER PLANT. TUTORIAL No. 8 STEAM CYCLES

UNIT 61: ENGINEERING THERMODYNAMICS Unit code: D/601/1410 QCF level: 5 Credit value: 15 OUTCOME 4 STEAM AND GAS TURBINE POWER PLANT TUTORIAL No. 8 STEAM CYCLES 4 Understand the operation of steam and gas

### 1. A 4 kg aluminum rod has a temperature of 100 C. It is placed into an insulated bucket containing 50 kg of water at 0 C. (T 0 C) = (4 kg) 900 J

Physics 101 Quiz #8 Solution November 20, 2002 Name 20 Minutes. Box your answers. density specific heat thermal coefficient of capacity conductivity thermal expansion (kg/m 3 ) (J/kg C) (J/m s C) (1/ C)

### Esystem = 0 = Ein Eout

AGENDA: I. Introduction to Thermodynamics II. First Law Efficiency III. Second Law Efficiency IV. Property Diagrams and Power Cycles V. Additional Material, Terms, and Variables VI. Practice Problems I.

### 1. INTRODUCTION Internal combustion engines are devices that generate work using the products of combustion as the working fluid rather than as a

1. INTRODUCTION Internal combustion engines are devices that generate work using the products of combustion as the working fluid rather than as a heat transfer medium. To produce work, the combustion is

### Mass and Energy Analysis of Control Volumes

MAE 320-Chapter 5 Mass and Energy Analysis of Control Volumes Objectives Develop the conservation of mass principle. Apply the conservation of mass principle to various systems including steady- and unsteady-flow

### There is no general classification of thermodynamic cycle. The following types will be discussed as those are included in the course curriculum

THERMODYNAMIC CYCLES There is no general classification of thermodynamic cycle. The following types will be discussed as those are included in the course curriculum 1. Gas power cycles a) Carnot cycle

### Thermodynamics worked examples

An Introduction to Mechanical Engineering Part hermodynamics worked examles. What is the absolute ressure, in SI units, of a fluid at a gauge ressure of. bar if atmosheric ressure is.0 bar? Absolute ressure

### Stirling heat engine Internal combustion engine (Otto cycle) Diesel engine Steam engine (Rankine cycle) Kitchen Refrigerator

Lecture. Real eat Engines and refrigerators (Ch. ) Stirling heat engine Internal combustion engine (Otto cycle) Diesel engine Steam engine (Rankine cycle) Kitchen Refrigerator Carnot Cycle - is not very

### 6 18 A steam power plant receives heat from a furnace at a rate of 280 GJ/h. Heat losses to the surrounding air from the steam as it passes through

Thermo 1 (MEP 261) Thermodynamics An Engineering Approach Yunus A. Cengel & Michael A. Boles 7 th Edition, McGraw-Hill Companies, ISBN-978-0-07-352932-5, 2008 Sheet 6:Chapter 6 6 17 A 600-MW steam power

### Lecture 36 (Walker 18.8,18.5-6,)

Lecture 36 (Walker 18.8,18.5-6,) Entropy 2 nd Law of Thermodynamics Dec. 11, 2009 Help Session: Today, 3:10-4:00, TH230 Review Session: Monday, 3:10-4:00, TH230 Solutions to practice Lecture 36 final on

### Chapter 22. Heat Engines, Entropy, and the Second Law of Thermodynamics

Chapter 22 Heat Engines, Entropy, and the Second Law of Thermodynamics C HAP T E R O UTLI N E 221 Heat Engines and the Second Law of Thermodynamics 222 Heat Pumps and Refrigerators 223 Reversible and Irreversible

### Thermodynamics of Steam

Thermodynamics of Steam Learning Outcome When you complete this module you will be able to: Describe the principles of the thermodynamics of steam and the associated terms. Learning Objectives Here is

### 18 Q0 a speed of 45.0 m/s away from a moving car. If the car is 8 Q0 moving towards the ambulance with a speed of 15.0 m/s, what Q0 frequency does a

First Major T-042 1 A transverse sinusoidal wave is traveling on a string with a 17 speed of 300 m/s. If the wave has a frequency of 100 Hz, what 9 is the phase difference between two particles on the

### DEPARTMENT OF MECHANICAL ENGINEERING Question Bank ME2301THERMAL ENGINEERING. Part-A (2 Marks)

DEPARTMENT OF MECHANICAL ENGINEERING Question Bank ME2301THERMAL ENGINEERING UNIT I GAS POWER CYCLES Part-A (2 Marks) 1. What is a thermodynamic cycle? 2. What is meant by air standard cycle? 3.. Name

### Entropy and the Second Law of Thermodynamics. The Adiabatic Expansion of Gases

Lecture 7 Entropy and the Second Law of Thermodynamics 15/08/07 The Adiabatic Expansion of Gases In an adiabatic process no heat is transferred, Q=0 = C P / C V is assumed to be constant during this process

### Physics Courseware Physics I Ideal Gases

Physics Courseware Physics I Ideal Gases Problem 1.- How much mass of helium is contained in a 0.0 L cylinder at a pressure of.0 atm and a temperature of.0 C? [The atomic mass of helium is 4 amu] PV (

### Process chosen to calculate entropy change for the system

Chapter 6 Exaple 6.3-3 3. ---------------------------------------------------------------------------------- An insulated tank (V 1.6628 L) is divided into two equal parts by a thin partition. On the left

### Objectives CHAPTER 11 REFRIGERATION CYCLES THE REVERSED CARNOT CYCLE REFRIGERATORS AND HEAT PUMPS

CHAPTER 11 REFRIGERATION CYCLES Objectives Introduce the concepts of refrigerators and heat pumps and the measure of their performance. Analyze the ideal vapor-compression refrigeration cycle. Analyze

### ENTROPY AND THE SECOND LAW OF THERMODYNAMICS

Chapter 20: ENTROPY AND THE SECOND LAW OF THERMODYNAMICS 1. In a reversible process the system: A. is always close to equilibrium states B. is close to equilibrium states only at the beginning and end

### Heat Engines and the Second Law of Thermodynamics

Heat Engines and the Second Law of Thermodynamics Heat Engines Reversible and Irreversible Processes The Carnot Engine Refrigerators and Heat Pumps The Second Law of Thermodynamics Homework Heat Engines

### ME 305 Fluid Mechanics I. Part 4 Integral Formulation of Fluid Flow

ME 305 Fluid Mechanics I Part 4 Integral Formulation of Fluid Flow These presentations are prepared by Dr. Cüneyt Sert Mechanical Engineering Department Middle East Technical University Ankara, Turkey