Celsius is on Ofgem-funded project that seeks to explore innovative, cost-effective technologies that can manage potentially excessive temperatures at distribution substations.
The £5.3 million Celsius project is the first application of a co-ordinated approach to managing the temperature of electrical assets in distribution substations in Great Britain.
The project is two-phase, firstly, 520 substations were fitted with monitoring software and equipment to develop a heat profile of different substation types. Secondly, retrofit cooling technologies were installed, with the sole purpose of cooling the transformer with a view to understanding how additional capacity can be released.
• Retrofit cooling capable of cooling a 1000kVa transformer.
• Installation works to be non-intrusive to business-as-usual workings of the substation.
• Minimal impact on neighbouring dwellings.
• Maintenance of natural transformer cooling in the event of downtime.
The 9.7kW CoolFlow system has been installed at all trial sites. Accounting for the different building types within the ENW network, the following variants of CoolFlow have been installed:
• 9.7kW CoolFlow – Externally Mounted
• 9.7kW CoolFlow – Internal version
• 9.7kW CoolFlow – GRP External Door-mounted version
• 9.7kW CoolFlow – GRP Internal Wall-mounted version
All systems installed are maintenance-free solutions with patented G4 filtration media. Pre-configured control panels determine fan speed and temperature settings control cooling capabilities.
OfGem Project Report
In March 2020, OfGem and Electricity North West produced the closedown report which recommends Passcool as the most effective cooling system that was trialled. Passcool is noted to ‘release approximately 14% of transformer nameplate rating, in some cases, up to 30%’
Electricity North West note that across it’s network, Passcool could provide savings of 348,802 Kg CO2 emissions per year.