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11 Cards in this Set
- Front
- Back
3 types of heat transfer
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-conduction-heat passes through a material
-convection-heat transfer in fluids -radiation- heat travels in electromagnetic waves |
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The "hot well" is...
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the space at the bottom of the condenser below the tubes
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atmospheric pressure at sea level is...
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14.7 pounds per square inch absolute or 0 pounds per square inch
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When throttling gate valves in the circulating water, keep valves at least...
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1/4 open
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An open condenser is...
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a confined space
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Never use_____for cleaning condenser tubes
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abrasive or metal tools or wire brushes
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Methods to remove soft fouling
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-High pressure water jet
-non-metalic brushes (nylon) or plugs |
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Galvanic corrision
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dissimilar metals joined together and immersed in an electrolyte (seawater). current flows from one metal to the other through the fluid
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Replace zincs when they....
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are half corroded
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Dezincification is...
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when heated saltwater on brass tubes causes particles to cling to tube surfaces and perforate the wall
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Replace plugged tubes whenever...
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total number if plugged tubes reaches 10%
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