Heat Exchanger: +40C rise at 16 liters/minute flow rate

AI Thread Summary
The discussion focuses on calculating the heat transfer rate between hot external water and cold internal water in a pipe, specifically addressing the internal heat transfer coefficient. Participants express uncertainty about using the Nusselt number equation for this calculation and seek clarification on its application. There is a request for insights on estimating the Nusselt number and guidance on how to proceed with the calculations. The conversation emphasizes the importance of understanding the heat transfer coefficients in the context of heat exchangers. Overall, the thread highlights the need for accurate methods to determine heat transfer rates in engineering applications.
Edwardminett
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Summary:: How to calculate the rate of heat transfer between hot external water and cold internal water in a pipe.

The image attached is my attempt at the question however, I find myself stuck trying to work out internal and external heat transfer coefficient.
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What are your thoughts on how to proceed so far, say, first for the case of the internal heat transfer coefficient?
 
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Chestermiller said:
What are your thoughts on how to proceed so far, say, first for the case of the internal heat transfer coefficient?
I'm not to sure, most places I searched said use the Nusselt number equation but I'm not sure if this is correct or how to calculate this?
 
Edwardminett said:
I'm not to sure, most places I searched said use the Nusselt number equation but I'm not sure if this is correct or how to calculate this?
Tell me your understanding of how the Nusselt number is estimated. Where have you researched so far?
 

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