INDUSTRIAL RESOURCES, INC. Power Plant Fundamentals Training
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1 INDUSTRIAL RESOURCES, INC Power Plant Fundamentals Training Module 2 Power Plant Theory
2 Power Plant Fundamentals Training This program is designed to provide you with a fundamental understanding of power plant operation. Some of the information may not apply to your specific facility but is provided to give you an overall picture of power plants used in the power industry. Industrial Resources, Inc. A Training Services Company
3 OBJECTIVES Demonstrate Basic Knowledge of: Energy Conversion Fluid Properties and Fluid Flow Pressure Temperature and Heat Thermodynamics Unit Energy Conversion Processes Water/Steam Properties Steam Applications Steam Tables and Their Uses Plant Performance
4 Energy Conversion Fuel and Air (Chemical Energy) to Thermal Energy (Heat) Module 8, Fuels and Combustion Heat Transfer to Water and Steam Module 9, Boilers Thermal Energy to Mechanical Energy (Torque) Module 10, Turbines Torque to Electrical Energy Module 13, Power Generation
5 Heat Transfer
6 Question 1 The energy conversion that occurs in the Boiler Furnace is chemical energy into. Electrical Energy Thermal Energy (Heat) Mechanical Energy (Torque) No energy conversion occurs in the Boiler Furnace
7 Question 1 Answer If you said Electrical, you were right. We want to make electricity so that we can sell it to customers.
8 Fluid Properties and Flow What Is a Fluid? How do we describe Fluids? What are some Fluid Properties? How do Fluids flow?
9 Atoms and Elements Atom smallest piece of an element Element a type of substance Only about 100 elements But millions of combinations of them Examples of elements are:
10 Before we go any further, you might be thinking: How big is an atom? Suppose you had 1 pound of iron (Fe). How many atoms do you think are in that pound of iron? Actually, there are about 5 million billion billion atoms in that pound, or 5,000,000,000,000,000,000,000,000 atoms
11 Compound Combination of Atoms Millions of them, including: Water Carbon Dioxide Sulfuric Acid
12 Molecule smallest piece of a compound that is still the compound. If we broke down a molecule, we get atoms that make up that compound.
13 Chemical Reaction forming compounds from atoms or other compounds
14 Physical Properties Describe by Weight Describe by Temperature Describe by How Substance Flows Think about what State Substance is in States: Solid Liquid Gas
15 Solid Molecules in fixed positions Example: Ice is solid form of water If Temperature increases enough, melts
16 Liquid As add Heat, Liquid expands. Add enough Heat, Liquid starts to turn to Gas. Molecules not in fixed positions, but close Takes shape of container Example: Ice is solid form of water
17 Gas Molecules not close, spread out Fills container Example: Steam is gaseous form of water
18 What Is a Fluid? Something that Flows Liquid or Gas Can Turn Solid into Liquid Examples: Melting Iron Dry Ice is solid CO 2 Liquid CO 2 in Fire Extinguishers
19 Describing Fluids Pressure how much molecules try to keep away from each other Temperature how much molecules vibrate Heat Content amount of Thermal Energy in Fluid Density Mass of Fluid per unit Volume Viscosity Resistance to flow
20 Question 2 A Fluid is either a or a. Solid, Liquid Liquid, Gas Solid, Gas A fluid is ONLY a liquid.
21 Question 2 Answer If you said Liquid, Gas, you were right. A fluid flows and a solid does not flow, unless made into a liquid or a gas.
22 Question 3 Which state of matter has molecules close together, but free to move relative to each other and takes the shape of its container? Solid Liquid Gas Solid or liquid
23 Question 3 Answer If you said Liquid, you were right.
24 Pressure Force per unit Area
25 Atmospheric Pressure pounds per square inch (psi)
26 Barometer Maintaining a Vacuum is Difficult, So We Don t
27 Absolute Pressure Absolute Pressure psia bar 14.7 psia Scale Atmospheric Pressure Absolute 0 Pressure
28 Absolute Pressure Gauge Pressure 34.7 psia 20 psig Gauge Pressure Scale psia bar 14.7 psia 0 psig psig barg Atmospheric Pressure Absolute 0 Pressure
29 Absolute Pressure Gauge Pressure 34.7 psia 20 psig Vacuum Scale psia bar 14.7 psia 0 psig psig barg Atmospheric Pressure 2 in. Hg Vacuum In. Hg vac is 1 psi In. Hg abs. Back- Pressure Absolute 0 Pressure
30 Fluid Pressure Some Units gauges are Gauge have Pressure more than units one scale
31 Question 4 A device that measures atmospheric pressure is called a. Pressure Gauge Barometer Pressure Scale Vacuum Gauge
32 Question 4 Answer If you said Barometer, you were right.
33 Question 5 A fluid pressure of 40 psig has an absolute pressure of psia (on a day when atmospheric pressure is 14.7 psia)
34 Question 5 Answer If you said 54.7, you were right. You add the atmospheric pressure to the gauge pressure to get absolute pressure. In this case, that is = 54.7
35 Temperature and Heat
36 Don t Confuse Temperature and Heat Temperature Vibration of Molecules Heat Thermal Energy contained in Molecules Enthalpy measure of Heat Content Enthalpy affected by Temperature, Pressure, Volume, and State of Molecules Water at boiling temperature has the same temperature as steam at boiling temperature, but a different heat content
37 Unit of Heat Content - Btu One British Thermal Unit (BTU) is about one wooden match in energy
38 Formula for Enthalpy Enthalpy Enthalpy (H) = Internal Energy (U) + Flow Work (PV)/BTU Constant (J) Internal Energy - sum of the energy of vibration due to temperature of all of the molecules of a substance Flow Work (PV/J) - energy contained in a substance due to its pressure and volume J is a constant value that allows Enthalpy to be stated in BTUs
39 Temperature and Heat Add heat to boil water, but temperature does not change Internal Energy goes up due to change of state Flow work goes up due to change of volume Over 970 Btus to boil 1 pound of water at 14.7 psia
40 Fahrenheit (degf) Celsius (degc) Boiling Temperature 212 degf 100 degc Temperature Scales 180 degf 100 degc 9 degf = 5 degc 32 degf 0 degc Freezing Temperature
41 Plant Temperature Gauges
42 Question 6 Internal Energy (U) plus Flow Work (PV/J) equals (H). Temperature Enthalpy Entropy Torque
43 Question 6 Answer If you said enthalpy, you were right. The enthalpy is the heat content of the molecules in a fluid.
44 Question 7 Boiler temperature of 212 degf is indicated in Celsius as degc
45 Question 7 Answer If you said 100, you were right.
46 Thermodynamics Thermo heat dynamics motion General Energy Equation describes what each Component does
47 General Energy Equation Heat Heat In Positive Potential Energy Enthalpy Kinetic Energy Equipment Potential Energy Enthalpy Kinetic Energy Work Need Moving Parts for Work to occur Work Out Positive
48 General Energy Equation Heat Potential Energy Enthalpy Kinetic Energy Equipment Potential Energy Enthalpy Kinetic Energy Work Potential Energy energy due to position Kinetic Energy energy due to Speed Both small amounts, so can ignore them
49 General Energy Equation - Boiler Heat Enthalpy Boiler Enthalpy
50 General Energy Equation - Turbine Enthalpy Turbine Enthalpy Work
51 Other Parts In Time
52 Question 8 In analyzing equipment using the General Equation, which of the following is correct for a piece of equipment being analyzed? Heat Out Positive, Work Out Positive Heat In Positive, Work Out Positive Heat Out Positive, Work In Positive Heat In Positive, Work in Positive
53 Question 8 Answer If you said Heat In Positive, Work Out Positive, you were right.
54 Question 9 Which of the following is NOT TRUE when analyzing the Boiler? Heat In is Positive Work Out is Positive Enthalpy In is smaller than Enthalpy Out There is no Work out of the Boiler
55 Question 9 Answer If you said work out is positive, you were right. There are no moving parts in a Boiler, so there is no way that work can leave the Boiler.
56 Heat from Burning Fuel
57 Saturation Saturation Temperature temperature at which boiling occurs Liquid contains all of the heat it can hold before changing into a gas At Saturation Conditions can have fluid as a liquid and a gas at the same temperature Saturated Liquid liquid at boiling temp. Saturated Vapor steam at boiling temp.
58 Saturation Temperature & Pressure Temp. 212 F 14.7 psia 70 F Heat Added
59 Saturation Temperature & Pressure 621 F 1800 psia Temp. 212 F 14.7 psia 126 F 2 psia 70 F Heat Added
60 Saturation Temperature & Pressure 621 F Saturation Curve 1800 psia Superheated Steam Temp. 212 F Saturated Liquid/Steam 14.7 psia Sub-Cooled Liquid 126 F 2 psia 70 F Heat Added
61 Supercritical Supercritical Boiler Curve Critical Point Superheated Steam 621 F 1800 psia Sub-Cooled Liquid Saturated Liquid/Steam Temp. Saturation Curve Heat Added
62 Question 10 Steam that has a temperature higher than saturation temperature for the pressure is called. Saturated Steam Superheated Steam Supercritical Steam Subcritical Steam
63 Question 10 Answer If you said superheated steam, you were right.
64 Question 11 For each saturation pressure there is a unique saturation. flow temperature state principle
65 Question 11 Answer If you said temperature, you were right.
66 Steam Tables List Parameters for Water under many conditions Can use to check performance of equipment Table 1 Saturation: Temperatures Table 2 Saturation: Pressures Table 3 Vapor
67 Table 1 Saturation: Temperatures
68 Using Table 1 At a temperature of 147 degf, Saturation pressure is psia. Internal energy of Saturated Water is Btu/lb Enthalpy of Saturated Steam is Btu/lb The heat necessary to make 1 lb of water into 1 lb of steam at 147 degf is Btu/lb (hfg)
69 Table 2 Saturation: Pressures
70 Table 3. Vapor
71 Mollier Diagram In back of Steam Tables Allows a quick ballpark check of parameters
72 Question 12 In the Steam Table below, saturation pressure for 149 degrees Fahrenheit is psia
73 Question 12 Answer If you said 3.630, you were right. It is listed in the column just to the right of the temperature column on the same line.
74 Question 13 In the Steam Table below, the enthalpy of steam at a pressure of 1100 psia and 600 degf is Btu/lb
75 Question 12 Answer If you said , you were right.
76 Plant Performance Heat Rate Input over Output Units BTUs per KW-hour
77 Factors Affecting Heat Rate Condenser Cooling Water Temperature Condenser Cleanliness Coal Fineness Coal Quality and Wetness Air Heater Operation Sootblower Usage Overall Plant Maintenance
78 Question 14 The units of Plant Heat Rate are. KW-hours per Btu Btus per KW-hour Btus per hour KW per Btu
79 Question 14 Answer If you said Btus per KW-hour, you were right. It is the ratio of what fuel was put in to the electricity that went to customers.
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