If your A/C is centralised, you might consider using a ground-source heat pump to take part of the load. It would require some ground area for the pipework, which can be laid either horizontally or vertically.
The general principle is a heat exchanger with a compressor, much like an ordinary air-sink A/C system, except that it uses the ground which has a much larger specific heat capacity; this makes it considerably more efficient. I'm not sure whether this technology is directly applicable to data centres, as it's usually used with liquid systems in underfloor heating and cooling.
The cost for a GSHP capable of providing all the heating requirements for a UK home is currently in the 5-10 kGBP range.
Alternatively, there are energy storage systems which might allow you to transfer some (probably not all) of your peak load to off-peak hours. Economic constraints probably prevent you from using fuel cells, but deep-cycle lead-acid batteries may be worth investigating, along with compressed air.
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If your A/C is centralised, you might consider using a ground-source heat pump to take part of the load. It would require some ground area for the pipework, which can be laid either horizontally or vertically.
The general principle is a heat exchanger with a compressor, much like an ordinary air-sink A/C system, except that it uses the ground which has a much larger specific heat capacity; this makes it considerably more efficient. I'm not sure whether this technology is directly applicable to data centres, as it's usually used with liquid systems in underfloor heating and cooling.
The cost for a GSHP capable of providing all the heating requirements for a UK home is currently in the 5-10 kGBP range.
Alternatively, there are energy storage systems which might allow you to transfer some (probably not all) of your peak load to off-peak hours. Economic constraints probably prevent you from using fuel cells, but deep-cycle lead-acid batteries may be worth investigating, along with compressed air.