, Director of Integration at.
the design temperature the external heat rejection equipment must be rated to, typically there will also be an additional allowance for recirculation for multi-unit installations (usually validated by an external CFD based on extreme temperatures and wind conditions)..In an ideal scenario, the peak summer design temperature would be lower than the required supply air/water temperature in the data hall.
This allows the data centre to rely solely on the heat rejection plant and no chillers - minimising energy consumption and resulting in low PUE values.PUE is dependent upon whether the heat rejection plant operates using adiabatic cooling..However, for most data centres, peak summer temperatures exceed the required supply temperature.
This necessitates mechanical cooling to maintain design conditions.The larger the temperature difference, the harder the mechanical cooling system must work.
Compared to free cooling, mechanical cooling requires substantial electrical input, which ultimately contributes to more heat being rejected.
This can further increase water consumption if the heat rejection plant utilises adiabatic cooling.. Reducing the mechanical cooling demand.Standard solutions allow for a greater level of design and refinement – if a solution is going to be used multiple times then the benefit of good design is multiplied and amplified.
It afforded us a far greater level of stakeholder engagement and buy-in than we would typically achieve for a one-off design (see below).This resulted in, for example, designs that were highly optimised in terms of layouts, space allocation, adjacencies and functional flows – which could then be deployed across the PETP programme and wider prison estate.
It creates further efficiencies.For example, the standard building types can be used across a range of sites.