SUSTAINABLE ENERGY
A further 1.5MWe CHP is planned for the Castle Hill Hospital (CHH) site in Cottingham later this year.
now that has a long lifespan in order to accommodate these changes, rather than investing in an expensive asset that will need to be replaced when these changes are introduced.
In terms of how we might go about producing hydrogen on site, or otherwise procuring it, one of the potential paths we are pursuing is the purchase of one of more electrolysers, to undertake the process of splitting the hydrogen and oxygen. However, this would currently be an expensive option, since to produce the hydrogen required to run our smaller, 100 kWe CHP system at our SSU would require an electrolyser capable of generating in the region of 550 kWe of electrical power, at a significant cost, and would require a renewable power source to feed the electrolysers. We would require much larger electrolysers to meet
the fuel requirements for our 1.5 MWe CHPs, which would obviously be at a significant cost. One of the options we are exploring is to obtain grant funding for the purchase of elctrolysers from the Public Sector Decarbonisation Scheme operated by BEIS and administered by Salix Finance. We may also look at obtaining hydrogen from other other sources, such as Zero Carbon Humber, or, as the UK hydrogen network increases, or other low carbon hydrogen technologies improve over the coming years. If the NHS is to meet its Zero Carbon targets by the deadlines set, there will undoubtedly need to be a wholesale switch by many Trusts from running their CHP systems on gas to harnessing renewable energy sources. If some of the practical challenges can be overcome, hydrogen makes perfect sense.
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Tel: 01666 818087 April 2021 Health Estate Journal 51
Alex Best
Alex Best is the head of Capital at Hull University Teaching Hospitals NHS Trust. He has over 20 years’ experience as a mechanical and electrical engineer and project manager in the NHS, Royal Engineers, and private consultancy – with Currie and Brown, formerly Sweett Group. Leading the Trust’s Capital Development, Sustainability, Property, and PFIs Department, and with his strong engineering background, he has a keen interest in ensuring that the Trust estate meets and supports the needs of the patients, both now and in the future. Key to this is, he says, is ensuring that the engineering systems deployed at Trust sites accord with the Trust’s ‘green agenda’ in forthcoming years.
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