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Heat recovery on exhaust gas

TEMISTh is developping a heat exchanger for heat recovery application on exhaust gases, for example on automotive engine.

The sample was designed in order to be produced by additive manufacturing. The following pictures shows surface orientation angle. We minimize the total area of surface with angle over 45°.

Heat exchanger orientation for additive manufacturing

Heat exchanger orientation for additive manufacturing

For exhaust gaz heat recovery, it’s important to obtain a high efficiency on the gas flow with limited pressure losses. We maximize the cross area of hot gas by adding hexgonal tubes and fins. This allow to maximize the heat transfer and thus reudce the length of the heat exchanger to limit pressure drop.

Temperature profile on the heat exchanger

Temperature profile on the heat exchanger

The following pictures shows the additive manufacturing process of the heat exchanger and the final piece before post-processing.

The laser is sintering stainless teel powder to create the heat exchanger

The laser is sintering stainless teel powder to create the heat exchanger

additive heat exchanger

 

Une nouvelle façon de concevoir et de produire pour les énergies du futur