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DatDan513 t1_ithve48 wrote

With speed heat burners. I love those… too bad they cracked easily due to the fluctuation In voltage but Jesus jumping Christ they worked great.

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dezualy OP t1_ithvwft wrote

Haven’t had any problems with cracking, those are the original burners. But damn do they ever work well. Almost too well as I’ve scorched the bottoms of some cheaper pots and pans by accidentally overheating or forgetting about boiling water. More user error than anything though :)

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deadleg22 t1_iti3hx1 wrote

How efficient are these in comparison to modern range ovens?

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garugaga t1_iti3w1j wrote

It's electric resistive heat, they're both 100% efficient.

The oven will be less efficient as I'm sure it will have worse insulation than a modern oven.

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Oldtvstillidie t1_itikrob wrote

I have a 56 Frigidaire imperial, this ones big brother. The oven is built and insulated just like a modern electric stove. It seems to cycle less and cook more evenly than the newer POS it replaced.

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ProjectSnowman t1_itm1tml wrote

It’s probably insulated with asbestos. Too bad about the cancer, because that stuff is amazing.

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Oldtvstillidie t1_itm28o3 wrote

Frigidaire used fiberglass/mineral wool. They didn’t skimp on it either. The wiring is all asbestos though. Great stuff. Doesn’t burn and short out. I don’t worry about the wiring it’s encased in a sealer.

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[deleted] t1_itinsqq wrote

[deleted]

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RespectableLurker555 t1_itiqmyg wrote

Someone needs to go back to thermodynamics class.

Electric resistive heat is 100% efficient at turning electrical energy into heat energy.

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TristanTheViking t1_itipu42 wrote

If you mean like the amount of heat that gets from the burner to the pan, sure. But that's more of a comparison you'd use between different types of burners like gas or induction, not two resistive heating elements. Heat transfer is never perfect.

If you're considering how well it converts electricity into heat, 100% is pretty accurate.

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tx001 t1_itk42cg wrote

The entire point of it is to heat a pan. That is what is generally meant by efficiency from a practical perspective. How efficient is it at getting heat into the pan?

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MSgtGunny t1_itipn9i wrote

Heat pumps have an efficiency higher than 100%.

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limpymcforskin t1_itjyczh wrote

They do because they don't generate heat. They transfer heat from one place to another. There is no possible way to generate heat at a greater efficiency than 100%

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MeshColour t1_itj9fhf wrote

I don't know of any heat pumps being used for burners, it would work but expensive initial cost for that application. Especially compared to how well induction works, and insulation on the oven increases that efficiency. Maybe for commercial kitchens, I imagine heat pump deep fryers exist?

Or someone should invent all those (and give me a small percentage of the total income from the idea)

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MSgtGunny t1_itj9z9l wrote

Oh you wouldn’t for a stove, it was just the shortest answer I could give that proves his statement as incorrect. The more complicated answer, but more relevant to his incorrect statement is that resistive heating is 100% efficient if you include electromagnetic outputs (such as infrared and visible light) as “heat”.

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limpymcforskin t1_itjyf7f wrote

There aren't any. It would take way too long. There are heat pump dryers though. Those are cool.

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DatDan513 t1_itif56s wrote

The speed heat burners are unique and amazing. They worked by using an exceptionally high voltage (220v) at first to get them red hot FAST.. like amazingly fast and then a thermostat would reduce the voltage to 120v. They work so much better than modern burners.

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Hornswallower t1_itj7uvk wrote

Reading "an exceptionally high voltage (220v)" from a 240v country where the actual voltage is usually hovering around 255v at the outlet...

Dafuq are you low voltage lot on about?

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jared555 t1_itjupjq wrote

Our electric stoves and ovens tend to be 240v too once you get into multiple burners.

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F-21 t1_itkz2ks wrote

well, if we're measuring dicks... :)

Ours are often even three phase since three phases are quite common in some parts of Europe. I doubt they're using 380/400V (between phases), cause they also work on 240V, so I assume they route the separate panels to separate phases so they can all draw more current at the same time.

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jared555 t1_itl9vyq wrote

Our three phase tends to be 120V/208V when talking about residential and small business which results in things like stoves running slightly cooler due to the lower voltage.

I think for residential they just run two phases to each apartment though.

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F-21 t1_itlowv4 wrote

I'm so glad to have industrial three phase power, I have a a bunch of old 'bench' (pedestal) grinders with ~1.5kw motors (2hp), all brushless on three phase power... A big old lathe, three phase drill press, a mill. If I only had a single phase I don't think I could run any of it (maybe with VFD).

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Iredditfromwork t1_itjrd38 wrote

https://youtu.be/jMmUoZh3Hq4

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Hornswallower t1_itjrx76 wrote

Is this long video trying to explain the concept of 3 phase?

Because we have that too at 415v

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TheDisapprovingBrit t1_itkbdqw wrote

What I'm getting us that they can jury rig a 240v connection if they need to, but it doesn't have an earth.

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CannadaFarmGuy t1_itkj5j5 wrote

Less than 1000 volts is considered low volts in electrical terms

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Hornswallower t1_itkkvof wrote

Depends on application.

500vdc is getting up where it's looking to bite. It'll arc if you're not careful and get too close and grab your hand then bad things are happening.

400vdc is still going to kill you if you touch it, but it isn't trying to jump off the rails and grab you.

Valve amplifiers are fantastic fun but holy shit if some of them aren't scary as shit on the inside.

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