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Devine Lu Linvega

Baked break in the sun. 🌻

Yes, we're both a bit incredulous that this worked?!

A small baguette in a solar oven tray.
60 comments
Wojo

@neauoire That's amazing!! :flan_baker:​

DELETED

@neauoire Ooh, nice.

Are solar cookers more efficient [in terms of physical space needed to cook] than attaching cookware to solar panels? I've seen small solar cookers that seem to be cooking with far more energy than I'd expect to get out of solar panels of equivalent size, so I assume so?

[photovoltaics are only ~24% efficient if you have a GOOD one; most are <20%. presumably, solar->heat could be >2x more efficient? unsure.]

/me has been pondering getting/making a solar cooker...

Devine Lu Linvega

@pixelherodev we definitely don't have the space aboard to expand our battery bank further, or installer more solar, but we do have the space to carry the little solar cooker.

DELETED

@neauoire > efficiency of some solar cookers is estimated to peak out around 80%.

Oh, yeah, that'd do it. Quick research shows some really nice advantages over a PV-based setup:

1. ~4x more of the solar energy is used
2. No efficiency losses to an inverter + the cooking appliance
3. Minimizing convection means *far* less energy is *needed*

/me moves "solar oven" from "research" to "investigate prices and options" phase of todo list :D

Thanks for the motivation! :)

@neauoire > efficiency of some solar cookers is estimated to peak out around 80%.

Oh, yeah, that'd do it. Quick research shows some really nice advantages over a PV-based setup:

1. ~4x more of the solar energy is used
2. No efficiency losses to an inverter + the cooking appliance
3. Minimizing convection means *far* less energy is *needed*

DELETED

@neauoire ...out of curiousity, what battery bank *do* you use? [chemistry, capacity, etc.] Most of your setup is on 100r.co/site/solar.html, but I don't see battery info :)

Still waffling on what to do on my end [fairly sure I'm going with lifepo4 though, for safety reasons vs lead acid or li-ion]...

DELETED

@neauoire awesome! I did t know you could bake with a solar oven.

Ninja Birdy in 🇬🇧

@neauoire This sounds really rad. How long did it take it to bake? And, is the sun there very strong or do you think this would work also on a very sunny day in , let's say England?

Devine Lu Linvega

@ninabreznik It took about an hour in direct sun, today is very clear, no clouds. It might take two hours in an overcast day. We made brussel sprouts when it was 4'C outside, in a totally overcast day, and they turned out great. I'm pretty sure it would work in england too.
100r.co/site/solar_cooking.htm

Ninja Birdy in 🇬🇧

@neauoire This is absolutely amazing. Love it, glad you found out about it as I can imagine it can be pretty annoying without an oven for a long time.

spooky blip 👻

@neauoire well, before we set off I'm going to the bulk store to get garlic bread and cinnastick ingredients... time to learn how to bake this summer 🍞 ☀️

excellent experimenting, enjoy!

Diego F. Goberna

@neauoire gorgeous! I can smell it.. is it actually well cooked on the inside?

Devine Lu Linvega

45 minutes in, we flipped it around, cooked it in the sun for another 15 minutes. And it's absolutely perfect.

That means that this summer we can make bread on demand, without using fuel, and without adding heat to the habitat.

Cooked bread in solar oven tray.
art (game) fan

@neauoire

looks delicious

makes me want to do something similar

thx

🥖

🌮 Dave Millar 🌮

@neauoire nice! I have the smaller travel version of this oven. Do you have any recs for making bread in it, like recipe changes or size/amounts to use?

Devine Lu Linvega

@dave not yet, it's only our first try. We'll do a couple more experiments and we'll have some better notes on bread baking with it.

R E K

@dave some recs so far, use parchment paper around the baguette so it doesnt risk sticking to the inside of the tube. I made a full recipe(3 cups of flour) but split it in two separate baguettes(maybe less for your solar cooker). Its better to add less since the bread expands and could get stuck in the stove.
Also this is a no-knead overnight bread recipe.
There are more practiced solar stove bread makers out there, there's a few YouTube videos about it (and blog posts too).
@neauoire

Thomas

@neauoire This looks amazing! Anywhere I can find more info about that?

Z@b0\/\/

@neauoire you're pushing the limits here 🙂

regarding some comments about PV efficiency being about 20%: are we goint to ditch photosynthesis because it's ~1% efficient? efficiency, in this case, means just that we're not using large parts of the spectrum exactly as if we weren't doing anything. it's not like the ~40% eff of an internal combustion engine in which we have 60% heat output and toxic/greenhouse emissions.

so if somebody has a large roof, install as much PV as you can and be 100% self sufficient. it's so cheap today.

of course living on a boat puts you in a special position and I enjoy your experiments! ;-)

I just don't wanna see people saying that PV is bad because it's ONLY 20% efficient.

I'll admit that spending 5K$ for 6kWp is not that sexy, adventurous or "bleeding edge" as your solar cooker though, ahah

@neauoire you're pushing the limits here 🙂

regarding some comments about PV efficiency being about 20%: are we goint to ditch photosynthesis because it's ~1% efficient? efficiency, in this case, means just that we're not using large parts of the spectrum exactly as if we weren't doing anything. it's not like the ~40% eff of an internal combustion engine in which we have 60% heat output and toxic/greenhouse emissions.

256k

@neauoire its almost like the sun is great source of energy that is constantly there and free! cant wait for everyone else to hear about this and finally end our dependence on fossil/coal....

Berkubernetus

@neauoire Nice! Got a pic of the full oven? What are you using?

Marie

@neauoire
Very nice! Looks like a great loaf and bake. 😁🌞

Avi Bryant

@neauoire wow. Have you measured what the temperature is inside the tube?

Devine Lu Linvega

@avi we haven't yet, we don't have a termometer

spooky blip 👻

@neauoire @avi I have both an infrared (point and click, at range) one and (somewhere?) I might still have a cooking thermometer (with the probe you stick in the food), hit me up

R E K

@neauoire @klardotsh @avi Supposedly, it can reach anywhere from 150°C(302°F) to 290°C(550°F), with an overall max temp of 371C(700F) (maker's numbers). Would be amazing to gather some numbers of our own to see if that is actually accurate.

spooky blip 👻

@rek @neauoire @avi my infrared reader maxes out somewhere between 250-300C (I forget) but we can play around with it!

tinspin

@neauoire How did it taste? Any concern about expanding bread in a glass tube?

Devine Lu Linvega

@tinspin it tasted amazing!! we made the loaves small enough that even if they expanded, we'd be able to pull them out. Also we surrounded the loaf with parchemin paper

Susa

@neauoire
Awesome! Is it just a metal pipe in the sunlight or does it need anything else?

Hamish

@neauoire Wow!!! That’s amazing actually. 🤔

0gust1

@neauoire aha, for one moment, I though you were handling the baguette with your foot (with a blue sock) 👓

Devine Lu Linvega

@0gust1 we have bright blue oven mits for some inexplicable reason..

jaseg

@neauoire This proves that French baguette is clearly superior to the German loaf. No chance doing that with a Kastenbrot!

A very rectangular loaf of german bread.
jejune

@neauoire whoa. What instructions and gear did you use?

Owen Anderson

@neauoire We've had good look with a GoSun on our boat as well.

Nina Kalinina

@neauoire good job! Is it tasty? Not too soggy?

What do you use for cooking when there's no sun?

Devine Lu Linvega

@nina_kali_nina it's perfectly crusty, I had the left over this morning as toasts and it was delicious too. It was 1/3 whole wheat.

We use LPG, or alcohol, when there is no sun.

Cat - One Creative Cat

@neauoire
I made a solar oven out of a pizza box one summer. We baked some cookies with the kids, it was fun!
(We live in the UK)

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