Comments on: Energy Monitoring http://iwanttosavemyplanet.net/blog/2007/11/14/energy-monitoring/ A personal approach to saving the planet Tue, 01 Dec 2009 13:45:15 +0000 hourly 1 http://wordpress.org/?v=3.0.1 By: bromley http://iwanttosavemyplanet.net/blog/2007/11/14/energy-monitoring/comment-page-1/#comment-14 bromley Wed, 14 Nov 2007 18:25:18 +0000 http://iwanttosavemyplanet.net/blog/?p=29#comment-14 Ah that sounds about right :) Incidentally, if your office has a big energy bill (£30k or more per year), there's a pretty good chance you'll be able to get half-hourly electricity data from your energy supplier. If you get that half-hourly data, and download the free trial of Energy Lens ( http://www.energylens.com/ ), you'll be able to learn a lot more about your energy consumption at different times of the day and days of the week. I should admit: Energy Lens is something that my company makes, making the above advice something of a shameless plug. Nevertheless, it is a pretty useful bit of software for energy saving, in my wholly biased opinion! Keep up the good work, Martin Ah that sounds about right :)

Incidentally, if your office has a big energy bill (£30k or more per year), there’s a pretty good chance you’ll be able to get half-hourly electricity data from your energy supplier. If you get that half-hourly data, and download the free trial of Energy Lens ( http://www.energylens.com/ ), you’ll be able to learn a lot more about your energy consumption at different times of the day and days of the week.

I should admit: Energy Lens is something that my company makes, making the above advice something of a shameless plug. Nevertheless, it is a pretty useful bit of software for energy saving, in my wholly biased opinion!

Keep up the good work,
Martin

]]> By: Donna http://iwanttosavemyplanet.net/blog/2007/11/14/energy-monitoring/comment-page-1/#comment-13 Donna Wed, 14 Nov 2007 17:42:33 +0000 http://iwanttosavemyplanet.net/blog/?p=29#comment-13 Thanks for pulling me up on this, Martin. Maths and I were never the best of bed pals :>) Anyway, we checked the full kettle (2.5Kw) boiling time on the gadget and it came to .29Kwh in total. This we calculated at 12p per Kwh to be £0.0348. This also means that the burger was £0.026. Phew! Thanks for pulling me up on this, Martin. Maths and I were never the best of bed pals :>)
Anyway, we checked the full kettle (2.5Kw) boiling time on the gadget and it came to .29Kwh in total. This we calculated at 12p per Kwh to be £0.0348.
This also means that the burger was £0.026.
Phew!

]]> By: bromley http://iwanttosavemyplanet.net/blog/2007/11/14/energy-monitoring/comment-page-1/#comment-12 bromley Wed, 14 Nov 2007 17:20:43 +0000 http://iwanttosavemyplanet.net/blog/?p=29#comment-12 Admirable energy monitoring, but those costs seem incredibly low... I'm guessing that either you have some very cheap energy source (e.g. an on-site wind turbine), or there's an error somewhere. Or I might have it wrong, of course! Anyway, I'm calculating that boiling a 2 kW kettle would cost at least 0.66p: a 2kW kettle running for 1 hour uses 2kWh of electricity; so a 2kW kettle running for, say, 2 minutes (2/60 hours), uses 2*(2/60) kWh of electricity, which is 0.066kWh; if 1kWh costs around 10p (approximately typical), that means that running the kettle for 2 minutes costs 0.66p. Admirable energy monitoring, but those costs seem incredibly low… I’m guessing that either you have some very cheap energy source (e.g. an on-site wind turbine), or there’s an error somewhere. Or I might have it wrong, of course! Anyway, I’m calculating that boiling a 2 kW kettle would cost at least 0.66p:

a 2kW kettle running for 1 hour uses 2kWh of electricity;

so a 2kW kettle running for, say, 2 minutes (2/60 hours), uses 2*(2/60) kWh of electricity, which is 0.066kWh;

if 1kWh costs around 10p (approximately typical), that means that running the kettle for 2 minutes costs 0.66p.

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