Fundamentals of Engineering Thermodynamics

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Fundamentals of EngineeringThermodynamics
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Introduction Chapter 1

• Thermodynamics is the study of energy
• It covers a wide range of applications we
  choose the system of interest
• The surroundings are external to our system of
  interest

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Closed System (Control Mass)

• No mass can cross system boundary
• Energy may cross system boundary
• Volume is NOT fixed

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Open System/Control Volume

• Mass may cross system boundary (control surface)
• Volume may/may not be fixed
• Energy may cross system boundary
• Control Volumes may operate at steady state, or
  change with time (empty/fill)

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Properties

• System characteristic carries both a numerical
  value and set of units
• 3 Types of thermodynamics properties Extensive,
  Intensive, Specific

• Extensive Depend on mass/size of system (Volume
  V)
• Intensive Independent of system mass/size
  (Pressure P, Temperature T)
• Specific Extensive/mass (Specific Volume v)

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Definitions

• State Condition of a system as defined by its
  properties
• Process Change a system undergoes from one
  equilibrium state to another
• Cycle Series of processes that return system to
  initial state

• Special Types of Processes
• Isothermal
• Isobaric
• Isometric
• Isentropic
• Adiabatic

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Pressure and Temperature

• P Force/Area
• Types
• Absolute
• Gage (Vacuum)
• Atmospheric

• Measure of thermal energy relative to hotness
  and coldness
• Must use absolute temperature scales (oR, K)