Apparatus and method for cooling a space in a data center by means of recirculation air
A data center comprising an air humidity- and temperature-conditioned space where heat producing ICT and/or telecom equipment is arranged, a heat wheel and means for supplying recirculation of air heated by the equipment as a first air stream to the heat wheel and the heat wheel being configured to cool the first air stream using a separate second air stream.
1. A data center, comprising:
an air humidity- and temperature-conditioned space in a building where heat producing ICT and/or telecom equipment is arranged, the ICT and/or telecom equipment having an operating temperature;
a primary data center cooling means, the primary data center cooling means comprising a substantially sensible only heat exchange heat wheel cooling a first re-circulated air stream heated by the equipment to a cooling temperature at or below the operating temperature using a second separate airstream at a temperature less than or equal to the cooling temperature minus a predetermined temperature difference without any additional cooling device, the primary data center cooling means comprising no refrigerant or liquid-based cooling; and
a secondary data center cooling means supplementing the primary data center cooling means when the second air stream is at a temperature greater than the cooling temperature minus the predetermined temperature difference to cool the first re-circulated air stream to the cooling temperature,
wherein the primary data center cooling means is configured to cool the first re-circulated air stream to the cooling temperature without any additional cooling device whenever the second air stream temperature is less than or equal to the cooling temperature minus the predetermined temperature difference.
2. The data center of claim 1 , further comprising means supplying the first re-circulated air stream cooled by the heat wheel to the equipment separately from the first re-circulated air stream heated by the equipment.
3. The data center of claim 1 , wherein the second air stream is supplied from outside the conditioned space.
4. The data center of claim 1 , wherein the second air stream is outside air.
5. The data center of claim 1 , wherein the heat wheel is arranged outside the conditioned space.
6. The data center of claim 1 , wherein the heat wheel is arranged outside the data center.
7. The data center of claim 1 , wherein the heat wheel comprises a plate-shaped heat exchange body which moves successively through the first re-circulated air stream and the second air stream.
8. The data center of claim 7 , wherein the heat wheel extends through a partition between two chambers, through which chambers the first re-circulated and the second air stream, respectively, are guided.
9. The data center of claim 1 , wherein a flow rate of the first re-circulated air stream is adjustable.
10. The data center of claim 1 , wherein the cooling temperature is greater than or equal to 20° C.
11. The data center of claim 1 , wherein the heat wheel is configured to rotate horizontally.
12. The data center of claim 11 , further comprising rollers operatively associated with the heat wheel to support it in its horizontal configuration.
13. The data center of claim 1 , wherein the cooled first re-circulated airstream is supplied at a front of the equipment and the heated first re-circulated airstream is removed at a back of the equipment.
14. The data center of claim 1 further comprising an exit opening operatively associated with the heat wheel and a supply duct connected thereto which supplies the cooled first re-circulated air stream as a separate air stream to a front of the equipment to be cooled.
15. The data center of claim 1 further comprising an inlet opening operatively associated with the heat wheel receiving the heated first re-circulated air stream from the space to be cooled.
16. The data center of claim 1 wherein the predetermined temperature difference is about 4° C.
17. The data center of claim 1 wherein the operating temperature is in a range of 20-25° C.
18. The data center of claim 1 wherein the select temperature of the second air stream is less than or equal to about 18° C.
19. The data center of claim 1 wherein the cooling temperature is approximately equal to the operating temperature.
20. The data center of claim 1 wherein a difference in temperature between the first re-circulated airstream heated by the equipment and the cooling temperature is about 6-12° C.
21. The data center of claim 1 wherein the heat wheel is constructed from a thermally conductive plate of material having a plurality of apertures disposed therethrough.
22. The data center of claim 21 wherein the thermally conductive plate of material is metallic.
23. The data center of claim 1 wherein the there is substantially no exchange of moisture between the first re-circulated air stream and the second air stream.
24. The data center of claim 1 wherein the humidity of the first re-circulated airstream remains substantially unchanged.
25. The data center of claim 1 wherein the secondary data center cooling means comprises at least one of soil storage, adiabatic or liquid cooling.
26. The data center of claim 1 wherein the flow rate of the second air stream is adjustable.
27. The data center of claim 1 wherein the rotary speed of the heat wheel is adjustable.
28. A method of cooling a data center, comprising:
providing an air humidity- and temperature-conditioned space in a building where heat producing ICT and/or telecom equipment is arranged, the ICT and/or telecom equipment having an operating temperature;
providing a primary data center cooling means, the primary data center cooling means comprising a substantially sensible only heat exchange heat wheel and no refrigerant or liquid-based cooling;
supplying a first re-circulated air stream from the humidity- and temperature-conditioned space heated by the equipment to the heat wheel;
supplying a second separate airstream at or below a select temperature to the heat wheel, the select temperature being selected so that the first air stream is cooled to a cooling temperature at or below the operating temperature by the heat wheel without any additional cooling device, the select temperature being less than or equal to the cooling temperature less a predetermined temperature difference;
rotating the heat wheel so that it moves successively through the first and second air stream;
providing a secondary data center cooling means;
using the secondary data center cooling means, supplementing the primary data center cooling means when the second air stream is at a temperature above the select temperature to cool the first re-circulated air stream to the cooling temperature; and
providing the first airstream cooled to the cooling temperature to the air humidity- and temperature-conditioned space,
wherein the primary data center cooling means cools the first re-circulated air stream without any additional cooling device whenever the second air stream temperature is less than the select temperature.
29. The method of claim 28 further comprising changing a flow rate of the first re-circulated air stream when adding or removing of ICT and/or telecom equipment from the conditioned space.
30. The method of claim 29 further comprising changing at least one of a second air stream flow rate or a rotary speed of the heat wheel in order to cool the first re-circulated air stream to the cooling temperature.
31. The method of claim 28 further comprising adjusting a flow rate of the second air stream as the temperature of the second air stream changes.
32. The method of claim 28 further comprising changing a rotary speed of the heat wheel in order to cool the first re-circulated air stream to the cooling temperature.
33. The method of claim 28 further comprising separating the cooled first re-circulated airstream from the heated first re-circulated airstream.