Double Pipe Heat Exchanger

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Double Pipe Heat Exchanger

• Jan. 22, 2003

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Todays Lecture

• Lab Teams and Schedules
• Double Pipe Heat Exchanger

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Lab Teams and Schedules
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Heat Exchanger

• Double Pipe Heat Exchanger

Hot
Cold
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Two Types of Flow

• Counter-Current
• Hot stream enters near cold stream exit
• Co-Current or Parallel
• Hot stream and cold stream enter near each other,
  and exit near each other.

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Counter-Current Flow
TH,in
?T1
TC,out
TH,out
?T2
TC,in
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Parallel Flow

TH,in
TH,out
?T1
?T2
TC,out
TC,in
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Heat Balance

• Cold Balance
• Hot Balance

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Heat Balance

• Overall Heat Transfer

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Experimental Plan

• Hot water in center, opposite of lecture
  schematic
• Cold water in annular region
• Set hot water for parallel or countercurrent flow
• Read temperatures and flow rates
• Three readings per rate
• Five flows for each configuration

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Data Analysis

• Calculate qc and qh. Compare.
• Calculate U.
• Calculate Error in U.
• Plot U vs. Re

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Questions to Address

• Which configuration was more efficient?
• How do these results compare with literature?
• Compare thermometer readings to thermocouple
  readings, and their effect on the error in U.