Products > Test Equipment

Test Equipment Anonymous (TEA) group therapy thread

<< < (25063/27437) > >>

Zucca:

--- Quote from: Specmaster on July 05, 2022, 09:17:41 am ---Also of course, the heat lost in the process of cooking, is not really lost in the winter as it contributes to the warming of your house? Its only in the summer months that the heat loss is really adding to global warming without adding anything useful in return  :-//

--- End quote ---

Burning fossil fuel in 2022 with potentially tons of PV energy on the roof (my case), it is just bad for everybody.
Again it's not just the business case, it the mostly right thing to do.

mnementh:

--- Quote from: Cerebus on July 05, 2022, 03:22:37 am ---
--- Quote from: mnementh on July 05, 2022, 02:37:45 am ---Except that generating and delivering an equivalent amount of heat as electricity is an order of magnitude less efficient than burning the natural gas directly to heat your food or water. No matter what mumbo-jumbo they're spouting, you still need to expend a certain amount of kilocalories to heat a galllon of water or to cook a dozen eggs.

--- End quote ---

Except that the pots and pans we use are horribly inefficient. You only have to hold your hand above the edge of pan on a gas cooker to realise that an awful lot of very hot air is rushing past the pan and not having its heat extracted from it. A while back I saw some pans that, unsurprisingly, had a bottom and sides that looked very heatsink like which improved the efficiency of the pan by at least a factor of two.

On the other hand it's hard to believe that the inefficiencies and losses involved in electricity are not going to be bested by a well designed water heater. Both burn gas in the first place, the thermal efficiency of heat transfer to water is probably going to be similar in both cases, but electricity then has generation and transmission losses to cope with. Obviously there are some indirect transmission inefficiencies in distributing gas too, pumping the stuff uses significant energy (There are 520 MW worth of gas turbines just used to pressurise the UK national gas core pipelines, before you consider what's used for local distribution). For heating hot water both methods could of course be greatly improved by using the energy not to heat the water directly, but to drive a heat pump to heat the water - even if you only get a CoP of 2 that's a huge efficiency gain..
--- End quote ---

Yeah, but the duty cycle of a gas hob does makes that a pretty small concession to reality; you spend much less time heating than any other way besides inductive. There your switching efficiency probably beats a resistive coil, might begin to approach break-even... but I doubt it. :-//

Under any circumstances, cooking over gas is much more viscerally pleasing... while a ceramic cooktop (even the new halogen ones) is much easier to keep clean, there are some things I feel we have a right to keep as they are. Some people grill over wood or charcoal for the same reason; I prefer a nice old propane BBQ with lots of dripping-cinders on the vaporizers.  >:D With grates scrubbed clean every use, of course. ;)

mnem
 :blah:

TERRA Operative:

--- Quote from: Vince on July 05, 2022, 11:43:13 am ---Yes indeed ! My RM17 rack mount glowing Tek scope has been waiting for caps and adapter PCB's for some time now, it's taking space on my bench !  :-DD

--- End quote ---

And you need to save up for a TDS scope from Japan!  :-DD

Good luck and as they say in Japan, Gambatte!

Cerebus:

--- Quote from: tggzzz on July 05, 2022, 12:39:39 pm ---
--- Quote from: Cerebus on July 05, 2022, 12:22:10 pm ---
--- Quote from: Specmaster on July 05, 2022, 09:02:39 am ---Ok, then that video does sort of make some sense, but here is another angle, what would happen with all that natural gas if we don't use it for heating or cooking? It's going to get released into the atmosphere and do what? Build up to become a huge big gas cloud that we are going to be breathing in and then one day a lightening strike ignites it and the entire planet erupts into a huge fireball and incinerates everything and everyone or worse, the planet blows apart and ceases to be a planet any more.  :-// :-// :-//

--- End quote ---

You must be pulling our plonkers. Natural gas that has happily spent millions of years underground is suddenly going to start floating up into the air if we don't use it?

--- End quote ---

Undersea methane clathrate/hydrate? (Note the question mark)

Methane in permafrost.

--- End quote ---

Not exactly stuff that we are currently harvesting/using which was the context, that of stopping using natural gas, nor the unpleasant possibility of there being a catastrophic positive feedback from global warming if we keep using the stuff and manage to release all those putative undersea stores.

Neper:

--- Quote from: mnementh on July 05, 2022, 12:50:43 pm ---Under any circumstances... if you do believe, it has got to be very hard to reconcile our abject failure as stewards of her masterpiece, this planet earth.
--- End quote ---

L'enfer, c'est les autres. That's why there are so many religions that believers can always put the blame on those praying by the 'wrong' book.

Navigation

[0] Message Index

[#] Next page

[*] Previous page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod