js200

js

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When to run appliances
... Saving energy in general is a positive step. For example, we've just bought a new freezer and dishwasher with better energy ratings and these will save money over their lifetimes. However, when is the best time to run a wash to save the most CO2e? Unless you are on an Economy 7 style tariff or have ...
time energy written 24 months ago by js200 • updated 23 months ago by Laser120
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Answer: A: Zombies can make as much as 50% of your bill. Do you know if you have many on th
... The main zombies in my place are the ones that can't easily be turned off. We turn off what we can at the wall when not in use, for example the TV and AV system. We have a fairly high base load and many of the culprits are hard-wired in: Mains powered smoke alarm system Active ventilation syste ...
written 24 months ago by js200
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Answer: A: Eco mode - is it really eco?
... What "eco mode" actually does depends on the appliance. You will have to measure it to see if it saves energy. Sadly, a lot of these modes are green-washing. On my combi boiler "eco mode" turns off the hot water pre-heating so it isn't wasting gas when not in use. This means you need to run the tap ...
written 24 months ago by js200
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Answer: A: Reducing the brightness
... As usual, it depends. You will need to measure it. The efficiencies involved should be equivalent to the difference between Fluorescent and LED room lighting. I imagine consumption will be a similar reduction proportionally. However, as the total use is lower to start with, the saving will not be a ...
written 2.3 years ago by js200
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Answer: A: EnergyNote meter's readings 70% higher than utility meter, why?
... I have the same issue and these errors could explain my high base load. A current clamp is never going to be as accurate as a meter. It only measures current and only samples this every few seconds. To get a full picture you need to sample both the current and voltage many times a second. This wil ...
written 2.3 years ago by js200
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Answer: A: Reducing the brightness
... Reducing monitor brightness is a good idea, but less relevant with modern LED back-lighting than with older CCFL (or even CRT) technology. Still worth doing but the savings will be less. Never use a screensaver! These are irrelevant today and just burn energy. If a screen is not in use then it shou ...
written 2.3 years ago by js200
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Answer: Re: LED vs Halogen
... I've recently replaced a room of 10 50W halogens with 4W LEDs. I estimate this will save over £70 a year and pay back in just over 4 months. If the rest of the halogens in the house hadn't already been replaced with LEDs then it would be more like saving £250 a year and a one month payback. I got s ...
written 2.7 years ago by js200
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Reading material
... Here's some further reading that I've found very informative. Feel free to chip in in the comments. Sustainable Energy – without the hot air by David MacKay (an essential read and available as a free PDF download) How Bad Are Bananas?: The Carbon Footprint of Everything by Mike Berners-Lee (brothe ...
books reading written 2.9 years ago by js200
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Answer: Re: Kettles in the UK
... The CO2e emissions for a cup of tea are not just made up of the cost to boil the water! This is an exotic product that has probably been grown in India. It needs processing (drying etc.) and transporting. A good book for more info is How Bad Are Bananas?: The Carbon Footprint of Everything by Mike B ...
written 2.9 years ago by js200
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Answer: Re: Time to boil water
... I think I have the same kettle and it is a lower wattage (and hence slower) than my previous one. Speed is not really relevant when it comes to energy use in this case. It takes the same amount of energy to raise the temperature of a set volume of water by a set amount. In ideal conditions power x t ...
written 2.9 years ago by js200
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