The scenario

In recent years, substation transformers have seen increased demand, especially during the summer months, often driven by the increased use of air conditioners in homes and offices. As a result, these transformers – already situated in high-temperature rooms – have been getting hotter, potentially reducing their operational life. Recognising this problem, EDF Energy together with Central Networks asked us to develop a simple passive solution to address overheating.

The solution

We installed a CoolFlow ™ system. This removed the heat directly from the transformers, lowering the ambient temperature of the room by 10°C.

We also installed CoolFocus ™ in the hottest basestations to keep batteries below 20°C and maximise their lifespan.

The results

Substation temperatures were reduced by up to 10°C without the need for powered cooling. Batteries were kept at 20°C, extending their lives from less than three to 10 years. As a result, there were energy and carbon savings of 90%, compared to conventional air conditioning systems.