Cooling system of electronic systems, in particular for data centre
A cooling system for data centre, which data centre includes a plurality of servers associated to form a rack, each server being provided with one or more heat generating means. The system includes a plurality of first heat exchange circuits and second thermosyphon circuits. The overall configuration of the system being such that the second thermosyphon circuits are in fluid communication with each other according to a parallel connection.
1. A cooling system for data centre, which data centre includes a plurality of servers associated to form a rack, each server being provided with heat-generating means, said system comprising:
a primary circuit, for each server, configured to allow circulation of a first thermal carrier fluid suitable for exchanging heat with said heat-generating means, wherein said primary circuit includes a heat exchange region coupled with said heat-generating means,
a plurality of second thermosyphon circuits each one associated to a respective server of said plurality and coupled to a respective primary circuit at said heat exchange region, said plurality of second thermosyphon circuits being configured to allow circulation of a second thermal carrier fluid suitable for exchanging heat with said first thermal carrier fluid,
wherein each primary circuit includes a device comprising an evaporation portion placed thermally in contact with said heat-generating means and a condensation portion, said condensation portion being overlapped to said evaporation portion and placed thermally in contact with a respective second thermosyphon circuit of said plurality,
the overall configuration of the system being such that said plurality of second thermosyphon circuits are in fluid communication with each other according to a parallel connection.
2. The cooling system according to claim 1 , wherein said plurality of second thermosyphon circuits are in communication with each other through a single delivery conduit and a single return conduit.
3. The system according to claim 1 , wherein said device includes heat exchange means associated to said evaporation portion and to said condensation portion configured to allow said first carrier fluid to exchange heat.
4. The system according to claim 3 , wherein said heat exchange means comprises a plurality of finned elements defining crossing channels for the first and/or the second thermal carrier fluid.
5. The system according to claim 1 , wherein said primary circuit includes a thermosyphon circuit.
6. The system according to claim 1 , wherein said primary circuit includes a pulsating heat-based heat exchange device.
7. The system according to claim 6 , wherein said pulsating heat-based heat exchange device includes an evaporation portion and a condensation portion coupled and overlapped therebetween to form a single monolithic body.
8. The system according to claim 6 , wherein said pulsating heat-based heat exchange device includes a coil element wherein said first carrier fluid flows, said coil element being obtained in said evaporation portion and said condensation portion.
9. The system according to claim 6 , wherein said coil element includes first portions positioned at the evaporation portion and second portions positioned at the condensation portion, said first portions and said second portions being placed in fluid communication therebetween.
10. The system according to claim 6 , wherein said coil element has a cross section having an equivalent diameter lower than 2 mm.
11. The system according to claim 7 , comprising an adiabatic plate interposed between said evaporation portion and said condensation portion.
12. The system according to claim 11 , wherein said adiabatic plate includes a plurality of openings distributed in an overlapping region (S) of said first portions with corresponding said second portions.
13. The system according to claim 1 , wherein said plurality of second thermosyphon circuits includes connecting means configured to implement a thermal coupling in series and/or in parallel with a respective primary circuit.
14. The system according to claim 2 , further comprising at least a recirculation conduit configured to implement a fluid communication between said single delivery conduit and said single return conduit.
15. The system according to claim 2 , further comprising connector means configured to implement and/or interrupt a physical and/or thermal coupling between said plurality of second thermosyphon circuits with said single delivery conduit and/or said single return conduit.
16. A cooling apparatus for a data centre having a plurality of server racks, which apparatus comprises:
a cooling system according to claim 1 for each server rack of said plurality;
at least a third cooling circuit thermally coupled with said cooling system and configured to allow circulation of a third thermal carrier fluid suitable for exchanging heat with said second thermal carrier fluid.
17. The apparatus according to claim 16 , comprising at least a cooling unit associated to said third cooling circuit and configured to subtract heat from the third thermal carrier fluid.
18. The system according to claim 10 , wherein said coil element has a cross section having an equivalent diameter between 0.5 mm and 1 mm.