Our progress so far

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My name is Richard Hales,

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I’m energy and sustainability manager here at the Trust.

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I’m going to talk to you today about some work we’ve been doing here

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at the Rosie as part of our overall drive to reduce the carbon footprint

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of the whole of our estate in terms of energy use.

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What we've been doing here up on the roof, is putting

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some photovoltaic solar panels up there.

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We put up

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quite a few panels two years ago, around 33 kilowatt output.

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We've connected those directly

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to the chiller plant, one of the chiller plants is up there.

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It runs by a direct current route through to that chiller

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where it is controlled by a very clever bit of power electronics

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that allows us to either store some of that energy, if the chiller plant

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doesn't need it, in some batteries.

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And also it controls the energy coming from the mains

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grid, which it would normally be powered by.

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So that we get the right mix, the optimum, the lowest carbon

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mix possible to run that chiller as efficiently as possible.

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We really are squeezing every kilowatt hour

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to the most efficient way we possibly can.

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We did that a couple of years ago and that's worked really well.

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It's been a great bit of kit and very successful for us.

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It's probably reduced the energy demand and lowered

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the carbon footprint about 40% on that bit of plant.

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About a year ago, we put it in for some public sector

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decarbonisation scheme money from government,

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we were successful in that, and so we've taken

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the same type of technology, but this time used it

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to run a heat pump down on level one of the Rosie.

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Again, we put some more photovoltaic panels up on the roof

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to provide some green power to it.

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The great thing about the heat pump is that it's replacing a chiller unit.

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So that will provide us with chilled water

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for air conditioning within the Rosie.

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But when you produce chilled water, you also end up

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generating some heat because you've cooled it, you've taken the heat out of it.

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What we've done there is take that heat and used it

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to warm up the domestic hot water going into the Rosie,

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so again, we really are squeezing every single bit of energy

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we can out of the electricity that's

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going into that heat pump.