21 posts / 0 new
Last post
Tom_Arundel
Tom_Arundel's picture
Offline
Last seen: 13 hours 37 min ago
Joined: 17/04/2014
Energy saving

Am I wrong about energy saving?  If an old type filament light bulb is 2% efficient at producing light where does the `wasted` 98% go? Surely it is dissipated as heat and therefore warms the house. And If I use the oven to cook a meal it is not very efficient at cooking the meal but the `wasted` heat warms the house..So..I agree that taken in isolation, ovens and LED bulbs etc seem to save power but overall do they? Are we just moving the accounts around? There is a basic law that energy in = energy out....makes me wonder! Read

Dave Hardcastle
Dave Hardcastle's picture
Offline
Last seen: 47 min 41 sec ago
Joined: 01/08/2015

This sounds like the opening of many, varied views Teacher

Jonathan Kay
Jonathan Kay's picture
Online
Last seen: 1 min 43 sec ago
Joined: 17/04/2014

Yes, the value of the space heating should be taken into account. But sometimes heat isn't needed there or then.

Yes, energy saving devices can reduce overall domestic energy consumption.

And have. And will. Those future reductions are part of the explanation of why the grid will survive the increased use of EVs.

Jonathan

https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/1061644/Energy_Consumption_in_the_UK_2021.pdf

Gareth H
Gareth H's picture
Offline
Last seen: 11 hours 22 min ago
Joined: 11/07/2022

Yep, to an extent,  but do you cook and turn the lights on in the summer? And has been said, if your heating thermostat is satisfied heating isn't required.

Shortshift
Shortshift's picture
Offline
Last seen: 1 hour 32 min ago
Joined: 17/04/2014

And note the decline of industry over that period (not, as may appear to be the case at first glance, the increasing energy efficiency of industry...).

James

Gareth H
Gareth H's picture
Offline
Last seen: 11 hours 22 min ago
Joined: 11/07/2022

Most companies invest in energy efficiency to save pounds and pennies, not tonnes of carbon, this is why the increase in energy costs will have a positive impact on carbon reduction, projects that had a 5 year payback (and wouldn't be viable for many organisations), may be down to 1-2 years ans are now considered a good investment.

Golf Juliet Tango
Offline
Last seen: 10 hours 57 min ago
Joined: 17/04/2014

As James says the decline in industry is dreadful because most of it represents exporting manufacture to elsewhere, not improved efficiency.

Stephen

Democratic dissent is not disloyalty, it is a positive civic duty

SLR No.77
SLR No.77's picture
Offline
Last seen: 1 hour 23 min ago
Joined: 17/04/2014

Re post #1 ... 98% of the electrical energy consumed might well generate heat but you'll find it pretty inefficient compared to other alternative methods of heating a house, even the electric versions.

Caterham and Lotus Seven Club Leadership Team Member

The register for all numbered limited-edition Caterhams ....... www.thecaterhamregister.net ...... www.instagram.com/thecaterhamregister

Andrew 21 Edney
Andrew 21 Edney's picture
Offline
Last seen: 12 hours 48 min ago
Joined: 20/06/2021

Re: #8 it would be interesting to note what an inefficient heater might be like because most things are inefficient due to producing heat which is not their purpose. Do you mean that the heat generated is not where you want it?

Club IT Lead, former Seven and 21 owner

SLR No.77
SLR No.77's picture
Offline
Last seen: 1 hour 23 min ago
Joined: 17/04/2014

Re: #9  My comment was "inefficient compared to other alternative methods of heating a house" rather than "inefficient compared to other alternative methods of generating heat".  A nuclear warhead would be extremely efficient at both generating heat and heating a house but would have some unintended side effects doing the latter. Horses for courses.

Stu.

Caterham and Lotus Seven Club Leadership Team Member

The register for all numbered limited-edition Caterhams ....... www.thecaterhamregister.net ...... www.instagram.com/thecaterhamregister

Tom_Arundel
Tom_Arundel's picture
Offline
Last seen: 13 hours 37 min ago
Joined: 17/04/2014

Just wondered because having gone through a major reduction in `wasted energy` (lights, cookers, hot water system, fridge/freezer etc. we now have to turn the heating up more to compensate Silly