Dear Alireza,

Don´t exist a "more efficient"... You can´t think in this way... The efficiency of the different architectures will depend on a lot of variants and factors... For sample:

A flat plate heat exchanger has a good heat transference between 2 liquids but is not good between a liquid and a gas.

Microchannel geometry has a high contact area, but have more restriction too, it can have a good performance with low viscosity liquids, but not will work good with a high viscosity liquids, like oil, for a sample.

Pin-fin have a good contact area and not is too restrictive, but can clog easy and is not recommended to use whit fluids that can have particles (for sample: A river or sea water, that is used in some cases as cooling fluid in industries).

Do you get the point?

Regards,

Cassio Alvarenga.

If there is the best type of HE, the rest would not be in use.

So, as explained by the predecessor, the input parameters are important.

what is your system? depends on type of the system you want to cool down.

A heat exchanger is a device that is used to change the temperature of the fluid by passing it through pipes that permeate another medium. The other medium is high temperature if we want to raise the temperature of the liquid or gas desired to raise its temperature. It is also possible to cool the liquid or gas required to cool it by passing it in tubes passing through the middle of the last temperature is low. The process of heat transfer from center to center is called heat exchange. The device in which the process is called a heat exchanger

Heat pipe fins are most commonly used for advantages: High heat transfer efficiency especially in gas treatment The largest heat transfer zone is approximately 5 times lighter than that of a tube shape and heat exchanger. Able to withstand high pressure