Counterflow double pipe heat exchanger

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SUMMARY

The discussion centers on the thermal design of a counterflow double pipe heat exchanger, specifically addressing the temperature profiles of the inlet and outlet streams. It is confirmed that all inlet and outlet temperatures can differ based on the heat exchanger's effectiveness, which is influenced by the thermo-physical properties of the fluids, wetted surface area, and overall heat transfer coefficient. A specific scenario is noted where the effectiveness reaches 100%, resulting in Th2 equating to Tc1.

PREREQUISITES
  • Understanding of counterflow double pipe heat exchangers
  • Knowledge of heat exchanger effectiveness
  • Familiarity with thermo-physical properties of fluids
  • Basic principles of heat transfer and temperature profiles
NEXT STEPS
  • Research the calculation of heat exchanger effectiveness
  • Explore the impact of wetted surface area on heat transfer
  • Study the thermo-physical properties of common heat exchanger fluids
  • Learn about temperature profile graphs in heat exchangers
USEFUL FOR

Engineers, thermal designers, and students studying heat transfer who are involved in the design and analysis of heat exchangers, particularly those focusing on counterflow arrangements.

cabellos2
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Im just generally reading through the notes for thermal design for a counterflow double pipe heat exchanger.

Is it possible for all temperatures inlets and outlets to be different for this type of flow arrangement?

What is confusing me is the temperature profile graph where Th2 appears to be the same temperature as Tc1?
 
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cabellos2 said:
Is it possible for all temperatures inlets and outlets to be different for this type of flow arrangement?
Yes it is possible. Inlet temperatures for both hot & cold streams depend upon the source(pretty much defined by the problem itself), the outlet temperatures depends on the effectiveness of the unit, which depends on the thermo physical properties properties of fluid, wetted surface area & overall heat transfer coefficient.
cabellos2 said:
What is confusing me is the temperature profile graph where Th2 appears to be the same temperature as Tc1?
A case when effectiveness of the exchanger is 100%.
 

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