Combating energy prices

Dirk Diggler said:
Surely the comparative difference in winter will be the exact same?
Click to expand...
I think summer Vs winter will be the same i.e. whether you wash at 30 or 60, there will be an extra ~10 degrees to heat the water by. Whereas if you compare 30 Vs 40 in winter and then 30 Vs 40 summer, the gap gets smaller in winter. So in summer you're talking 15 Vs 25 degrees to heat, so that's 66% more energy. In winter it's say 25 and 35, which is only 40% more.
 
The amount of energy doesn't change per Kg of water, it is still ~4200 J/kg°C consumed, so going from 10c-30c is the same energy use as going from 5c-25c, in the winter it is beneficial to use the lowest temperature you can as the cold water will start from a lower point, therefore more energy will be used to hit the desired higher temperature.
 
LuckyBenski said:
I think summer Vs winter will be the same i.e. whether you wash at 30 or 60, there will be an extra ~10 degrees to heat the water by. Whereas if you compare 30 Vs 40 in winter and then 30 Vs 40 summer, the gap gets smaller in winter. So in summer you're talking 15 Vs 25 degrees to heat, so that's 66% more energy. In winter it's say 25 and 35, which is only 40% more.
Click to expand...
That makes no sense to me.

If you reduce the washing temperature from 40 to 30 then you've saved the energy it takes to heat 10C of water. It doesn't matter which time of year it is because the supply water is always lower than 30C.
 
andy_mk3 said:
Just seen something interesting in reddit, someone measured their washing machine power consumption at different temps. I'm actually very surprised at the difference between 30c and 40c.

I usually wash at 40c thinking it wouldn't cost a lot more than at 30c. But I think I'll be washing at 30c in future.

Source
Click to expand...
What did the instructions say usage would be ?
 
Dirk Diggler said:
That makes no sense to me.

If you reduce the washing temperature from 40 to 30 then you've saved the energy it takes to heat 10C of water. It doesn't matter which time of year it is because the supply water is always lower than 30C.
Click to expand...
"You will feel the benefit more making this change in summer than winter, if you view it as a percentage change in energy cost, not a linear one".

Absolutely dropping 10 degrees has a pretty fixed benefit in terms of cost. But 10 degrees out of 15 seems a lot more impressive than 10 degrees out of 30.
 
the shadow said:
What did the instructions say usage would be ?
Click to expand...
I'm not the person you asked, but annoyingly our washer's instructions doesn't have a table that lists the kWh and L water usage for each cycle. It details maximum loads and times etc, but no mention of how much energy and water used per-cycle. A little irritating to be honest, especially when I'm trying to work out how much load we can shift into the GO window - at this rate, it'll be nothing but car charging and an electric radiator in one room of the house (a converted garage which the original owner didn't have plumbed into the heating).
 
I think all people are saying is that if the incoming water is 20 degrees and your washing at 30 then comparatively it will look a lot more significant than if the incoming water is 5 degrees.
If 20 to 30 takes 0.25kw then 30 to 40 will take an extra 0.25kw
So it looks like it uses half the energy to wash at 30 than it does at 40
But if the incoming is 5 degrees then 5 to 30 will take 5/8 of a kw and 5 to 40 will take 7/8 of a kw which doesn't look as impressive a saving.
 
If you drop the washing temperature by 10C then you'll save the energy it takes to heat the water by 10C. It will not matter what the temperature of the supply medium is unless the supply temperature is greater than 30C, which it won't be.
 
andy_mk3 said:
Just seen something interesting in reddit, someone measured their washing machine power consumption at different temps. I'm actually very surprised at the difference between 30c and 40c.

I usually wash at 40c thinking it wouldn't cost a lot more than at 30c. But I think I'll be washing at 30c in future.
Click to expand...
it does only have to touch the wash temperature , rather than sustain it , there is a which article where they monitored that, and, some machines didn't reach it,
but, it is the quality of the wash that counts, so if machine cleans the clothes as well as a 60C wash should, it can be certified at that.
The EU changed the energy rating on machines in March - which should give us/them more realistic energy consumptions.

e:
Even though the test results demonstrate machines often do not hit 60 °C, manufacturers are not actually cheating the EU Energy Label because there’s no minimum requirement for the washing machine to reach the temperatures stated on the control panel. However, the programmes used to calculate the rating stated on the Energy Label – the 40 ˚C and 60 ˚C cottons programmes – must reach a certain level of washing performance (the weighted average of the washing performance of the standard programmes at 40 and 60 °C has to be >1.03 which represents class A in washing performance according to EU regulation 95/12/EC). Instruction manuals must also contain wording stating that the temperature specified might not be reached, which many manufacturers have quoted as the reason for not needing to reach 60 ˚C
52319478082_101594a0cb_b_d.jpg


-----------------

I 'd like to know the facts behind this energy saving comment - referenced in the recent article about Iceland/centrica hook-up eg
www.independent.co.uk

Swapping oven for microwave could cut hundreds of pounds off energy bills

Ovens are the most energy-intensive cooking appliance, researchers find
www.independent.co.uk www.independent.co.uk

For example, a study published in the Journal of Consumer Studies and Home Economics found that simmering at 90 degrees rather boiling at over 100 can reduce consumption by between 69 and 95 per cent.
Click to expand...
we usually have stuff on a rolling boil (with the lid on)
 
Samsung eco bubble - We wash everything on super eco wash which is cold wash and put in some zeflora in the prewash draw.

Also have a Heat pump dryer which is great. We can do 3-4 loads of washing dried and only use 80p-£1 more on the smart meter
 
utajoker said:
Samsung eco bubble - We wash everything on super eco wash which is cold wash and put in some zeflora in the prewash draw.

Also have a Heat pump dryer which is great. We can do 3-4 loads of washing dried and only use 80p-£1 more on the smart meter
Click to expand...
Which heat pump dryer did you go for?
 
Im thinking of buying into the Ikea smart light/plug system, because all the items seem reasonably priced.

The main thing I want to do is have smart plugs to turn off wifi/tv systems at certain times of the day/night.

But how does this work? I can control the smart devices with my phone app, but if I use it to turn off my home wifi, can I turn it back on again?
 
danlightbulb said:
Im thinking of buying into the Ikea smart light/plug system, because all the items seem reasonably priced.

The main thing I want to do is have smart plugs to turn off wifi/tv systems at certain times of the day/night.

But how does this work? I can control the smart devices with my phone app, but if I use it to turn off my home wifi, can I turn it back on again?
Click to expand...
Not like that, no. Even if the phone app works via 4G and IKEA's cloud service (no idea if they have one), your local smart hub wouldn't be reachable.

It IS doable without internet if you set up/use a ZigBee network where you have a button or similar to turn the sockets back on. So you might need to keep the remote button handy or have a couple around the house.
 
Smart meter question..

I get up at 5:30am, and the meter shows I've used around 55-60p of electricity during the night (I assume it resets at 12pm?), and it shows around 70p when I leave for work at 7:30am, but when I get home at 5:15pm it only shows around 85-90p.
The same exact appliances are on during the day/night.
How is it costing me more during the night than it does during the day?
My immersion heater that used to come on at 5am is turned off at the wall at the moment.
 
danlightbulb said:
Im thinking of buying into the Ikea smart light/plug system, because all the items seem reasonably priced.

The main thing I want to do is have smart plugs to turn off wifi/tv systems at certain times of the day/night.

But how does this work? I can control the smart devices with my phone app, but if I use it to turn off my home wifi, can I turn it back on again?
Click to expand...
Set then up as a timer
 
danlightbulb said:
Im thinking of buying into the Ikea smart light/plug system, because all the items seem reasonably priced.

The main thing I want to do is have smart plugs to turn off wifi/tv systems at certain times of the day/night.

But how does this work? I can control the smart devices with my phone app, but if I use it to turn off my home wifi, can I turn it back on again?
Click to expand...
LabR@t said:
Set then up as a timer
Click to expand...
Don't think IKEA smart devices are that smart you need Zigbee devices like the Hue plugs (to turn router back on anyway )
Or just a plain old mechanical timer
 
Psycho Ned said:
I always assumed the smart meter IHD put the standing charge on as well but not 100% on that.
Click to expand...
I guess it may depend on the supplier and i can't see why all of them wouldn't operate like that as its part of your daily usage costs, but i can confirm to you mine adds standing charge straight away when it hits midnight.
 
You must log in or register to reply here.
Back
Top Bottom