same here - I used my power meter to check, but a Dell 17" value TFT used about 12 watts when running, and if you "power off" on the button, it STILL used 11 watts..just killed the output. Horrendous design.
We also have powerout, but the LEA policies etc seem to interfere with it. Maybe in the new building.
Movement sensors..we had. Electricians removed them as "useless"! 2 are now at my parents house, doing duty in the garage lighting system.. Excellent kit. No overrides either - you give teachers an override, they'll use it all the time. Not worth it. Think "idiot" and design accordingly.
We've removed the aircon control and put them above the ceiling to stop staff buggering about with it. Lightswitches should be the same. Stuff the poxy keyswitches too...the kids just smash the facias off.
Corridors should have the push "vacuum" delay switches or movement sensors IMO..no permanent on option. Loos the same.
Can you tell it annoys me? I walk round turning lights off..sigh.
Printers and the ilk I think should have a timeswitch built in, like the plugin ones I have at home. Set the "on" hours, walk away. Same with ring mains in the school rooms...if only they could run individually off timers for each room. That'd work nicely.
Make sure the kill switch is clearly labelled though - we had someone accidentally power down the IT Suite because they thought it was the light switch (in her defence, the kill switch is in a stupid place), resulting in the demise of a couple of mainboards.
Ok, I've been crunching some numbers for breakfast and this is what I've come up with - remember, this is a small Infant school, 250 children, 20 desktops, 1 Server, 1 um-Switch...
Currently, this equipment runs 24/7/365
7 Wireless APs
2 Belkin Bridge
2 Domestic Switches
A Reserved est put the total running cost for this equipment, based on 10p kWh (day), 7p (Night),
at £ 300 + VAT
Equipment used during school time (11 hours/day)
2 Laptop Charging trolleys
1 Hungry Photocopier
Again, my estimates put total running cost of this equipment, based on the tariff above, over 195 days, at £ 550 + VAT
I'm currently trialing a 'reduced timetable' for the Permanently on equip, hoping to SAVE approx.
£ 220 + VAT; And the on-demand equipement, SAVE another £ 250 + VAT
All in all, I think the risk of switching off some of the permanent equipment every night is worth it. Thank you to everyone for feedback - I'm now going to look at Shutdownertron and other scripts to make sure the Server doesn't turn off when it might still be needed.
In relation to times on the ring mains, these are very much possible, they go in with the MCB / RCD in the Consumer unit. I've got them in newer consumer units for outside lighitng. Digital timers and obv locked in dis-boards means no teacher fiddling!!!
I know my granny used to say "look after the pennies and the pounds willl look after themselves" but schools could save far far far bigger money by controlling the heating systems better than fiddling with the low power ICT equipment/lighting
Its like worrying about switching your TV off at the plug at night when you've still got your central heating system running in May
Or worrying about MP's claiming a few extra thou in expenses when the world economy is up the creek.
If something is left switched on - then it will fail due to overheating, mech failure or some random failure event.
Switching it off and on will stress it very much more and lead to much more chance of failure unless its a rotating mechanical device in which case switch it of
Agreed. Turning off Switches, or your AD server is a bad idea. These devices can and will complain bitterly if you do this.
Also, on the router - if it is provided by your LEA/ISP (ie a managed internet connection like we have), turning it off most likely will upset them. Ours is monitored remotely, to ensure our connection is working. If it goes off, we get phonecalls.
Obviously, things like desktop PC's, photocopiers, projectors and the like should be off when not in use. They chew through power like no-body's business.
our big red switches are just that..heavy duty cooker-esque ones with neons, next to the teacher PCs...
The heating in this place does cost a bomb..but we share the site with a leisure centre and ski-slope, so we apportion the bills accordingly.
New place has ground-source heating loops and underfloor heating throughout, which should be minimal cost to run, as well as keeping the place to a fairly uniform temperature. REALLY looking forward to that.
I'm hoping that the BMS will allow me to take data from it and graph it, so we can have a live display of wind turbine output, power usage, building temperature, ground source heat levels, mains/rainwater usage etc, and bolt it up with the display from our weather station, then put it to the display systems in the foyer and our IT office.
I think it'd make interesting reading and possibly some interest for..say..science.
sahmeepee (20th May 2009)
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