What is the optimal mass flow rate facing the heat pipe?
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What is an appropriate face mass flow rate for a heat pipe? Because in the application I have in mind now, I want to recover the heat from the gas, but the flow rate of the gas is very low; as a result, the mass flow rate facing the surface is also very low, around 0.65 kg/(m2*s). Is this value appropriate? The calculated heat transfer coefficient is very low, but due to the large area of the heat pipes (compared to my operating conditions), the heat transfer capacity of each individual heat pipe is still considerable. Can this flow rate be taken this way?
The typical standard wind speed facing a heat pipe exchanger is 2~3 m/s.
Regardless of the size of the heat exchanger? It’s for industrial and electronic cooling applications – is the mass flow rate facing the surface always 2-3? I have seen this statement before as well, but since the gas flow rate is extremely low, the mass flow rate is very small. What problems can arise from such a low value? There shouldn’t be a problem of the tubes burning out, right?
What about the flue gas side, and how should the water side be considered?