By Eamonn Ryan
Every additional megawatt of IT equipment ultimately becomes heat that has to be removed, rejected and managed reliably.
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That question has now been given a striking new dimension. According to a recent Financial Times report, Eskom is actively courting major technology companies, including Amazon, Microsoft and Google, as it looks to sell surplus electricity to energy-intensive industries such as data centres.
The development represents a remarkable turnaround for a utility that became synonymous with electricity shortages and load shedding. Eskom chair Mteto Nyati told the Financial Times that the utility currently has electricity “that we cannot sell” and wants to attract industries capable of consuming significant quantities of power.
For South Africa’s data centre sector, that changes the conversation considerably.
From electricity constraint to commercial opportunity
Eskom reportedly entered the winter period with approximately 6GW of surplus peak capacity, representing its strongest reserve position in almost a decade. The improvement follows a significant recovery in generation performance and comes after more than a year without load shedding.
This does not mean that South Africa’s electricity infrastructure no longer faces challenges. Grid constraints, municipal debt, transmission investment and the long-term reliability of generation remain important considerations. However, the idea that South Africa simply does not have sufficient electricity to accommodate new data centre capacity is becoming increasingly difficult to sustain as a blanket argument.
Indeed, the country’s data centre market is already expanding rapidly. South Africa hosts the majority of Africa’s data centre capacity, supported by its relatively mature telecommunications infrastructure, fibre connectivity and established financial and commercial sectors.
The attraction is growing as cloud computing, artificial intelligence and digital services drive demand for additional capacity. The proposed expansion of major facilities illustrates the scale of the opportunity. At the same time, operators have increasingly looked towards renewable energy, private generation and power-purchase agreements to reduce their dependence on the national utility.
Eskom’s new approach raises the possibility that some of this demand could instead become a direct commercial opportunity for the utility.
What this means for the built environment
For the HVAC&R industry, the significance goes well beyond the electricity market. A data centre is essentially a continuous heat-generation facility. Every additional megawatt of IT equipment ultimately becomes heat that has to be removed, rejected and managed reliably.
Consequently, growth in data centre capacity creates demand throughout the HVAC&R value chain: precision cooling, chillers, heat rejection, pumps, controls, electrical infrastructure, monitoring, redundancy and increasingly sophisticated liquid-cooling systems.
Higher-density AI computing is also changing the technical requirements. Traditional air cooling can become increasingly difficult as rack power densities rise, creating opportunities for direct-to-chip liquid cooling, rear-door heat exchangers and other advanced thermal-management technologies.
Eskom’s courtship of data centre operators therefore has implications far beyond electricity sales. If the strategy succeeds, it could help unlock another wave of investment in South Africa’s data centre infrastructure – and consequently another wave of work for the country’s HVAC&R sector.
But having enough electricity is only one part of the equation. The bigger question for the HVAC&R sector is what happens when that electricity is converted into increasingly dense computing power – and how South Africa will keep the next generation of data centres cool, efficient and operational around the clock.
