Cengel ch03

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Cengel ch03

  1. 1. CHAPTER 3Energy Transfer byHeat, Work, and Mass
  2. 2. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.FIGURE 3-9Specifying thedirections ofheat and work.3-1
  3. 3. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.FIGURE 3-19A gas does adifferential amount ofwork δWb as it forcesthe piston to move by adifferential amount ds.3-2
  4. 4. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.FIGURE 3-20The area under theprocess curve on aP-V diagramrepresents theboundary work.3-3
  5. 5. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.FIGURE 3-22The net workdone during acycle is thedifferencebetween thework done by thesystem and thework done on thesystem.3-4
  6. 6. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.FIGURE 3-48Schematic for flowwork.3-5
  7. 7. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.FIGURE 3-51The total energy consistsof three parts for anonflowing fluid and fourparts for a flowing fluid.3-6
  8. 8. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.FIGURE 3-58The absorption ofradiation incident onan opaque surface ofabsorptivity α.3-7

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