NHS Scotland reduce energy and carbon through amorphous technology

Scotland has set some of Europe’s most ambitious carbon targets, aiming to reduce its total climate emissions by 66% before 2032. This far-reaching strategy looks at energy generation as well as energy consumption. The role NHS Scotland must play in sustainable energy and resource use targets a reduction in end-use energy consumption of 12% by 2020.

Famous for introducing laparoscopic surgery to the UK, Ninewells Hospital, NHS Tayside is internationally recognised as a leading centre in medical genetics and robotic surgery. Like many public-sector organisations, the age of NHS Tayside’s hospitals present a greater challenge when meeting tough carbon emission targets. Justifying investment in new assets and energy saving technology must demonstrate a return on investment and improvements to the healthcare service.

Reinforcing the power network of Ninewells hospital whilst reducing energy consumption, cost and carbon emissions

NHS Tayside’s proactive approach to sustainability ensures that they have an informed understanding of where and how to invest in energy saving initiatives

Upgrading the high voltage assets at the Ninewells Hospital to state-of-the-art, super low-loss amorphous transformers was one such opportunity that would present the hospital with multi-benefits. Besides delivering energy and carbon savings, the hospital will increase the resilience of the hospitals critical power network in line with the business continuity management programme.

Replacing just one old inefficient high voltage transformers will save the hospital over £7,300 each year

Ninewells Hospital undertook an energy study of the existing transformer’s consumption rate to establish the real potential for energy and carbons savings. The results conclude that by replacing the existing 11kV:433V unit from 1967 with a 11kV:415V Wilson e2 amorphous transformer of the same capacity, combined energy savings of approximately 61000 kWh per annum would be realised.

Lasting benefits for a sustainable NHS

The transformer room in the molecular biology wing at Ninewells houses four transformers of a similar age, presenting the hospital with the prospect to significantly reduce their energy and carbon.

The entire transformation project at Ninewells Hospital will save NHS Tayside approximately 61,000 kWh per annum per transformer. Each transformer will provide carbon savings of 27,113kgs and energy cost savings of over £7,000 a year.

Once all four transformers are online, the project is forecast to provide energy savings over a 5-year period of 304,000kWh, approximately 1.79% of the total electrical energy consumption at T1. This, in turn, equates to a reduction in carbon of approximately 135,564kg over the same 5-year period (total) and an energy cost saving of over £143,000.


Erika Wilson, MD at Wilson Power Solutions, will present an in-depth case study on the Ninewells Hospital transformer replacement project in the in the facilities, technology and innovation theatre at the Emex 2018 exhibition on Wednesday 21st November at 16:10pm.