Air con cost?

[Ian ParkinParticipant @ianparkin39383]

Whilst shopping in the local Lidl in the heatwave at the moment was just musing as to how much it would cost to cool a shop like that? a day? are we talking £100, 400,1000?

Anyone have any idea?

[VicParticipant @vic]

AI says this.

[Clive FosterParticipant @clivefoster55965]

Ian

Ruthlessly simplifying and summarising what Mrs Google says :-

Under UK conditions around 0.5 p per hour per cubic meter of room volume would be of the right order.

Mrs Google also says that typical LiDL store volumes range from 25,000 to 100,000 cubic metres. So maybe £125 to £500 per hour. Probably more in a heatwave.

Clive

Vic was a bit quicker on the keyboard.

[howardbParticipant @howardb]

Big-Four format stores are typically incurring £400,000 in energy bills each year. – £1095 per day.

The True Running Cost of a Supermarket

Both Lidl and Aldi stores local to us have recently been rebuilt totally;

Lidl was a new build on a new site, Aldi closed down, demolished and built new on the old site, both have flat roofs with PV solar, I think it’s a mandatory requirement on new builds here.

 

[Mark RandParticipant @markrand96270]

As another datum, my 30m^2, 105m^3 shed uses 4.6kWh/day at the moment to keep it at 21°C. But I built it with 5″ of PU foam in the walls and roof and 4″ of EPS under the concrete floor. At that rate it’s about .5p/day per m^3.

Low footfall and very low air changes compared with a supermarket and not running yards of relatively open freezers and chillers.

 

[Adrian R2Participant @adrianr2]

New LIDL going up near me. Renders show about half of roof to be covered with solar, but they will also have a large carpark and no solar on that (unlike e.g. France) so maybe they are not too bothered about power bills.

Edit – I looked up the planning docs. They will have 180kWp of rooftop solar, mechanical heat recovery, active blinds and canopies to manage solar gain, with several sets of air source heat pumps for different areas.

[BazyleParticipant @bazyle]

Although solar panels on a car park sounds a good idea in the UK horizontal panels would have a low output and you would have to remove every loose brick and stone within a two mile radius.

[Mark RandParticipant @markrand96270]

Comment about loose bricks and stones noted. 😀

But the panels on the shed are pretty well horizontal. 1:12 slope ENE and WSW facing. 5.4kW of panels will produce 4kW of power under optimal conditions (sunshine like we’ve recently been having, but temperatures 15°C cooler) Under current conditions it’s 3.5kW. Optimum orientation tends to be trumped by cost-effective installation.

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