Apparatus and Method for Cooling a Space in a Data Center by Means of Recirculation Air

Abstract

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; and   a data center cooling means, the data center cooling means comprising a substantially sensible only air to air heat exchange 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 data center cooling means comprising no refrigerant or liquid-based cooling,   wherein the 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 air to air heat exchanger 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 air to air heat exchanger comprises a heat wheel, the heat wheel comprising a plate-shaped heat exchange body which moves successively through the first re-circulated air stream and the second air stream. 
     
     
         6 . The data center of  claim 5 , wherein the heat wheel extends through a partition between two chambers, through which chambers the first re-circulated air stream and the second air stream, respectively, are guided. 
     
     
         7 . The data center of  claim 1 , wherein a flow rate of the first re-circulated air stream is adjustable. 
     
     
         8 . The data center of  claim 1  wherein the predetermined temperature difference is about 4° C. 
     
     
         9 . The data center of  claim 1  wherein the operating temperature is in a range of 20-25° C. 
     
     
         10 . The data center of  claim 1  wherein the temperature of the second air stream is less than or equal to about 18° C. 
     
     
         11 . The data center of  claim 1  wherein the cooling temperature is approximately equal to the operating temperature. 
     
     
         12 . 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. 
     
     
         13 . The data center of  claim 1  wherein there is substantially no exchange of moisture between the first re-circulated air stream and second air stream. 
     
     
         14 . The data center of  claim 1  wherein the humidity of the first re-circulated airstream remains substantially unchanged. 
     
     
         15 . The data center of  claim 1  further comprising an additional cooling means for supplementing the cooling of the air to air heat exchanger when the second air stream is at a temperature greater than the cooling temperature minus the predetermined temperature difference to cool the first recirculated air stream to the cooling temperature. 
     
     
         16 . The data center of  claim 15  wherein the additional cooling means comprises at least one of soil storage, adiabatic or liquid cooling. 
     
     
         17 . The data center of clam  1  wherein the flow rate of the second air stream is adjustable. 
     
     
         18 . 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 data center cooling means, the data center cooling means comprising a substantially sensible only air to air heat exchange 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 air to air heat exchanger;   supplying a second separate airstream at or below a select temperature to the air to air heat exchanger, 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 air to air heat exchanger without any additional cooling device, the select temperature being less than or equal to the cooling temperature less a predetermined temperature difference;   and   providing the first airstream cooled to the cooling temperature to the air humidity- and temperature-conditioned space,   wherein the 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.   
     
     
         19 . The method of  claim 18  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. 
     
     
         20 . The method of  claim 18  further comprising adjusting a flow rate of the second air stream as the temperature of the second air stream changes. 
     
     
         21 . The method of  claim 18  further comprising separating the cooled first re-circulated airstream from the heated first re-circulated airstream.