VENTILATION
said 20% would be a better target, and was affordable. On specific targets, it noted that just
72,000 new heat pumps were installed last year against an annual target of 130,000, which the CCC said should rise to 145,000 this year. We are well behind comparable markets across Europe too. France, for example, is fitting about six times the number of heat pumps we are.
Right at the heart of the battle Engineering services are the largest energy consumer in buildings, so our industry is right at the heart of this battle. Lord Markham thinks the industry should try to replicate the spirit of the Nightingale Hospital programme. He was referring to the collaborative spirit that delivered emergency healthcare facilities at speed during the pandemic, and showed that the industry could ‘challenge current methods’ to get things done more efficiently. He said the Government had also learned a lot from previous efforts to improve the procurement of schools and prisons – and the success of Hospital 2.0 could lead to decades of work to upgrade every hospital in the country. However, he acknowledged that the
Government was ‘often the biggest barrier to progress’, and was responsible for an ‘unwieldy planning process’ that would also have to be addressed. “We need the industry to invest and scale up to meet this challenge,” he said. “So, we need you to have confidence in the programme.” Morag Stuart, the project’s Chief
Programme officer, told a recent industry webinar hosted by the Building Engineering Services Association (BESA)
A recent case study conducted by Daikin Applied UK found that upgrading traditional belt and pulley fans to the latest technology EC fans with IE5 motors increased energy efficiency from 41% to 70%.
that the building services sector needed to see that it was ‘a clear part of this journey; otherwise we won’t be able to deliver at the scale we need’. The issue of ongoing maintenance would, she said, be a central part of the planning, citing the example of an operating theatre that was currently out of action because it was ‘waiting for a replacement light bulb from Finland’.
Moving from construction to manufacturing She said: “We plan to be ground-breaking to move from a typical construction
The benefits of upgrading AHU fans
One of the most underutilised steps that NHS Trusts can take to help them reach demanding Net Zero targets and ensure the most energy-efficient operation of their plant is to get existing air-handling unit equipment refurbished. Although there are many elements to an AHU that can be upgraded to improve efficiency and future maintainability, no component upgrade yields greater benefits than AHU fan upgrades. A large majority of existing AHU equipment on site is utilising old fan technology, which is both costly to maintain and energy-inefficient when compared with the solutions available today. It’s not uncommon to see old belt and pulley fan arrangements with high absorbed power and low overall efficiencies at sub 50%. It’s also worth noting that for this reason, the
use of traditional belt and pulley fans is no longer permitted within HTM 03-01-compliant AHUs. A recent case study conducted by
DAPUK found that by upgrading a large volume AHU from traditional belt and pulley fans to the latest technology EC fans, complete with IE5 motors, the energy efficiency increased from 41% to 70%, in turn reducing SFP targets to aid compliance with the latest building regulations. From an energy- saving standpoint, the estimated kWh halved from just over 500,000 kWh to 250,000 kwH, reducing the estimated annual energy cost from £171,000 to £85,000, and C02
emissions from
155 tonnes to 78 tonnes. These figures take into account the energy price guarantee, and are based on £0.34 per kWh & 0.309 kgCO2
/kWh. Most hospitals have upwards of
30 AHUs installed across the entire site. By following the data available and carrying out fan upgrades across all existing AHUs, significant energy and CO2
savings can be made.
Carrying out such works should be at the forefront of an NHS Trust’s mechanical works due to the stringent targets to reduce carbon footprint by 80% by 2028, and achieve Net Zero by 2040.
Supplementing the above, the additional benefit to the use of EC fan technology is their space-saving installation and maintainability. Most EC fans can be installed and changed over in 20-30 minutes – due to their low weight, simple mounting arrangement, and streamlined wiring process. They can also be installed in a wall arrangement to facilitate in-house redundancy.
October 2023 Health Estate Journal 87
programme to a manufacturing approach with a key role for standardisation. We will be very explicit about the standards that must be adhered to in all our hospitals,” adding that she hoped that as many of the standardised components as possible could be manufactured in the UK. “A hospital is a huge consumer of energy, not least because you are looking at six air changes per hour across the whole facility, so there’s a lot of work going into how we do that better,” she added. At Daikin Applied UK (DAPUK) we are seeing this thinking reflected in growing
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