Why Super Low Loss Amorphous Transformers are a Non-brainer for Britain’s Leading Universities
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Supply transformers are a common piece of electrical infrastructure on campuses across the UK. Despite some major advancements in super low loss technology, old and inefficient transformers continue to waste thousands of pounds in avoidable electricity costs each year. This session will showcase energy saving capabilities of modern supply transformers and provide you with the opportunity to get best practice advice and first-hand experience from a senior engineer in the estates and environment department of one of Britain’s leading Universities.
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Why Super Low Loss Amorphous Transformers are a Non-brainer for Britain’s Leading Universities
- 1. ENERGY SAVINGS THROUGH SUPPLY TRANSFORMERS Erika Wilson, Manging Director
- 2. Agenda 2 Meet Wilson Power Solutions Why transformer losses matter: Energy savings outside the “box” The Eco Design Directive for transformers Super low loss amorphous transformers Case studies & testimonials 1 2 3 4 5 Your questions answered6
- 3. Wilson Power Solutions • 70yrs old family run SME in 3rd generation • Transformer & switchgear suppliers to industry • Pioneers of super low loss 3
- 4. Energy Efficiency Savings – Only inside the building? 4
- 5. 2.9% Energy generated wasted through transforme Transformers are silent energy guzzlers 5*EU27 (2008) losses amounted to 93.4 TWh
- 6. Supply transformers – Time and again overlooked 6
- 7. Transformer losses No load losses (“core losses”) Permanent 24/7 from being energised Load losses (“winding losses”) Product of load current 7
- 8. EU Eco Design Directive Transformers Tougher design specifications for transformer losses • Tier 1: Effective since 1st July 2015 • Tier 2: Effective from 1st July 2021 8 Applies to transformers “placed into the market or put into service” anywhere within the European Union.
- 9. EU Eco Design Directive Transformers 9 “National Regulating Authorities are strongly advising…..” …to allow for the installation of more efficient transformers than the regulation requires whenever these are economically
- 10. Our solution since 2009 - The Wilson e2 UK’s first super low loss amorphous transformer • Amorphous metal core • Lowest combined transformer losses • Meeting /exceeding Tier 2 (2021) Eco Design Specifications 10
- 11. Eco Design Directive: Transformer loss comparisonSize Standard loss (CRGO) pre 2015 Tier 1 – July 2015 Tier 2 – July 2021 Core Losses [W] Load losses [W] Total Watts Core losses [W] Load losses [W] Total Watts Core losses [W] Load losses [W] Total Watts 1000kVA 1,350 12,500 13,850 770 10,500 11,270 693 7600 8,293 %age change -19% -26% Products Standard Loss CRGO Txs Wilson e1 Wilson e2 amorphous 11
- 12. Amorphous core technology CRGO Amorphous ámorphos: origin Greek; shapeless • Random atomic structure • Lower hysteresis losses • Lower eddy current losses 12
- 13. Material comparison 13 • 10 sheets of AMT to 1 sheet CRGO
- 14. Fancy adding £35,000 to your estates bottom line? 14 1x infrastructure decision = 25 years of Energy Savings
- 15. Average age of a distribution transformer in UK? 15 Ofgem: 62 years = born in 1954!
- 16. Savings through TX losses: OLD energy guzzling 1970’s unit hidden on site? 33400kWh = £3170/pa** Mitigating ~ 18t CO2 /pa* Could be significantly more if older*Carbon factor: 1kWh = 0.537 kg/CO2 ** Cost at terminals: 1kWh = £0.095 Based on 1000kVA liquid filled transformer with 70% load 16
- 17. Guaranteed savings from reduced transformer losses Two areas for energy savings Potential savings through voltage management /VO 17 1. 2.
- 19. • Constant output voltage • Buck & Boost • 17 positions in 1% steps • Fully automatic AVR relay Wilson e2+with OLTC – On Load Tap Changer 19
- 20. • 6.4% voltage reduction • Reduced transformer losses 6% electricity reduction “Install & forget solution” Annual savings: £31k Wilson e2 transformer replacement – UHSM 20 For more details contact Mark Foden a
- 21. 1x 2MVA transformer (Sub 1 T2) • 7.5% voltage reduction • Reduced transformer losses 2.6% electricity reduction Savings: 272,949kWh ~£22,000 pa* *(0.08p /kWh) Wilson e2 transformer replacement - McCain 21
- 22. Wilson e2 transformer replacement – University of Warwick 22 “It appealed to us to select the product with the best energy efficiency onto our estate, further given the availability of 2021 compliant transformers for what was in effect only a modest increase in capital cost over that of a 2015 compliant version, it was in reality a “no brainer” to select the e2 for two recently completed substation upgrade projects” Electrical Design Engineer, The University of Warwick