Scope 3 – Carbon Emissions
Data Center Infrastructure
The same approach described above for building-related Scope 3 carbon may be applied to data center infrastructure Scope 3 carbon. A key difference between the two asset classes, infrastructure and building, is that the operational life of infrastructure components is likely to be less than that of the building.
Here the monthly Scope 3 carbon allocation is distributed across the whole set of infrastructure assets and the proportion supporting a client’s services evaluated as for building-related Scope 3 emissions.
Consider a single infrastructure asset with Scope 3 carbon of 1000 Kg CO2e which is replaced every ten years. The monthly Scope 3 carbon allocation from this asset is simply: 1000 𝐾𝑔 𝐶𝑂2𝑒120 𝑚𝑜𝑛𝑡ℎ𝑠~8.3 𝐾𝑔 𝐶𝑂2𝑒/𝑚𝑜𝑛𝑡ℎ.
The value apportioned for any client’s services in that month is evaluated using the ratio of IT energy used versus total IT energy, as described previously, illustrated in the figure
The total monthly data center infrastructure Scope 3 quantity is therefore simply the sum of all the monthly rates for all infrastructure assets.
Note that reuse by a third party at end of operational use in the data center will simply reduce the effective monthly Scope 3 rate allocated within the time and physical system boundaries of the data center.