Advanced products:

Advanced tubeless heat exchanger project is designed :

- To solve problems of materials due to very high temperature in primary circuit on High Temperature Reactors.
- To increase the efficiency of the heat exchanger on gaze coolant reactors.

The idea to perform the heat transfer, is to increase the contact surface between the two coolants .
In our heat exchanger, there's no more separation through the two coolants, they are directly in contact. The principle is to use two coolants with a very big density gap. For an optimized solution one coolant fluid will be a gas and the other a very high density element ( for example, lead and Helium).
The gas coolant could be the steam vaporized at working conditions and the other coolant could be chosen between the different metallic possible mixture liquid at working conditions. The gas bubbles in the metallic coolant, the exchange surface between the two coolants is very important.
The density gap between the two coolant realizes a very good separation of the two coolants by centrifugation at the top of the heat exchanger.

So is done a very efficient heat exchange suitable for high temperature or metallic coolant reactors.

Density gap is also a "barrier" for fluids and prevents the primary coolant to leak outside the primary circuit.
With that kind of heat exchanger fast reactors with sodium as primary coolant and gas as secondary coolant is safety enough to be realized.



Advanced Heat Exchanger:

The heat exchange is done in four operations:

a) Gas injection, fluids mixture :

The primary fluid enters in the heat exchanger by the bottom.
The secondary fluid is injected in the primary fluid at the base of the heat exchanger:

b) fluids separation:

After the phase of mixing, we separate the two fluids by centrifugation.
We use propellers to rotate the flow:
At the top of the propellers, the fluid separation is done.

c) recuperation:

At the top of the heat exchanger, the metallic fluid is recuperated by a toric device then goes back to the primary circuit .

The gas goes up. Some metallic coolant particles are blocked by condensation grid.
The cleaned gas and metallic coolant are perfectly separated and could be use again in process.