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How long does a freezer stay frozen when the power goes out?

woodgears.ca

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Re: How long does a freezer stay frozen when the power goes out?

#111
post #98

Earlier quoted context omitted.

Yeah, I can certainly appreciate the environmental and cost savings, but this would make me miserable. I could get myself the make the trip for ice cream, but the multiple runs back to the fridge while preparing food has me agitated just thinking about it.

you'll learn to plan your meals better. take everything out that you need before you start...

[deleted]

Re: How long does a freezer stay frozen when the power goes out?

#112
> When opening an empty upright freezer, all the cold air can just "fall out"

I recently found that the ice-cream refrigerators of street vendors (and everything else that is being sold when the doors are frequently opened) are opening on the top for that exact reason - to not let cold air "fall out" (because cold air is on the bottom)

Re: How long does a freezer stay frozen when the power goes out?

#113
post #98

Earlier quoted context omitted.

Yeah, I can certainly appreciate the environmental and cost savings, but this would make me miserable. I could get myself the make the trip for ice cream, but the multiple runs back to the fridge while preparing food has me agitated just thinking about it.

you'll learn to plan your meals better. take everything out that you need before you start...

This is almost comedy for those with kids.

Re: How long does a freezer stay frozen when the power goes out?

#114
post #28

You want the contents to remain BELOW 0C, not hovering at 0C while everything melts. You can do this by adding some salt-water bottles, which have a lower melting point, and will therefore absorb a lot of heat (heat of fusion) well below 0C. Eg add 250g salt/liter gives melting point of -18C. Of course you waste some space on useless salt water vs potable - maybe there are better alternatives, eg fruit juice? Milk? H…

I'd have to do the calculations but wouldn't you be better off with a solution that just barely froze at freezer temps? Because of latent heat of melting? i.e. you want it to freeze--just at as low a temperature as possible given the freezer temperature. Your basic point makes sense to me though of course thawing isn't even. ADDED: Doing the calculation. It takes 334 joules to melt 1g of water vs. about 4 joules to r…

[deleted]

Re: How long does a freezer stay frozen when the power goes out?

#115
post #61

I bought and filled a chest freezer in pandemic preparations. Cost of the chest freezer: CAD 1,000 Cost to completely fill the freezer with good food: CAD 2,700 Given that, during a pandemic or a winter storm in Canada, a power failure can be a prolonged event... Cost of a good gas powered generator to keep the freezer viable beyond a day: CAD 1,000. This article seems to validate the generator purchase.

I'm a little unclear on how one efficiently uses a generator to power highly intermittent loads like fridge/freezer.

Does one monitor the freezer temperature, and when it starts warming start the generator, then wait for the freeze compressor stops, and then turn off the generator?

Or does one keep the generator running all the time, so between times of the freezer running the generator is idling?

The second option is certainly more convenient, but seems like it would waste fuel while idling. The first option would last longer--but the generator is supposed to be kept away from the house and it could get annoying to have to keep going out to start and stop it.

Re: How long does a freezer stay frozen when the power goes out?

#116
post #98

Earlier quoted context omitted.

Yeah, I can certainly appreciate the environmental and cost savings, but this would make me miserable. I could get myself the make the trip for ice cream, but the multiple runs back to the fridge while preparing food has me agitated just thinking about it.

you'll learn to plan your meals better. take everything out that you need before you start...

"Refrigerate X while cooking Y, then remove X from fridge as Y begins to [something]," and variants of that phrase are common scenarios in recipes. Your point is only valid for a portion of recipes, not all.

Let's also take into account how many ingredients you may need from the fridge when you plan ahead. Certain meals may require multiple trips to/from the basement (however far away that may be) depending on how many - and the size of - ingredients involved.

Also, what mjmj said, re:kids.

Re: How long does a freezer stay frozen when the power goes out?

#117

The location of the freezer or refrigerator is critical. If you live in a house that has a typical unfinished basement, don't overlook the advantage it offers. With one simple change, you can noticeably lower your electric bill, reduce your carbon footprint, gain extra kitchen space and improve your health. Just move your refrigerator to the basement. Since the basement is normally cooler than the upstairs, the refri…

Is the efficiency benefit bigger than getting a different model or taping some styrofoam to the outside of the fridge?

I’d hazard a guess that most of the losses are from when you open the door and the seal around the door. Also while cooler than ambient my fridge and freezer don’t feel cool to the touch so I think that the walls are thick enough.

Otherwise fridges and freezers would ship with thicker insulation.

Re: How long does a freezer stay frozen when the power goes out?

#118
post #81

Earlier quoted context omitted.

My wife was convinced the refrigerator was failing so I bought a few sensor tags from wirelesstag.net [1] just to be sure. You can certainly build your own using off-the-shelf IOT devices, but for ~$35 you can have a device that senses temperature, humidity, light levels,and runs for several months off an easily replaced cr2032. Although to be fair you must buy a base sensor station for $39 along with the first tag.…

I looked at the product page for the wireless sensor and I saw this: >No subscription fee of any kind for life; no monthly or annual fee to use cloud service and no cloud storage fee for data collected by sensor tags. >High anonymity: only your account email address and tag manager IP address is collected That sounds... slightly disturbing. It suggests the tags sends all the data to the manufacturer's server. That's…

Yes. Your data is relayed to them.

Re: How long does a freezer stay frozen when the power goes out?

#119
post #98

Earlier quoted context omitted.

Yeah, I can certainly appreciate the environmental and cost savings, but this would make me miserable. I could get myself the make the trip for ice cream, but the multiple runs back to the fridge while preparing food has me agitated just thinking about it.

you'll learn to plan your meals better. take everything out that you need before you start...

There have already been two replies pointing out why this is a bad idea, but, why is this a good idea? Why is learning to plan your meals better (for... some definition of that term, which doesn't appear to be the usual one) worthwhile?

Re: How long does a freezer stay frozen when the power goes out?

#120
post #102

Earlier quoted context omitted.

I have a Samsung fridge and there is a problem that causes water to pool in the meat/vegetable trays. It's very simple - a tube in the back behind a panel takes run-off under the fridge. But this drain runs past the freezer, so it freezes solid eventually and overflows. It took quite a while to work out the first time but YouTube came to the rescue. The fix is apparently replacing or extending the stupid little piece…

Interesting- on mine, this hose is external. There is a fitting that goes all the way through the wall insulation and hose runs along the back of the fridge.

It's not the same model, but if you check around 2:50 here you can see the setup with the panel off including the little metal tab at the bottom.

https://youtu.be/rwSSMF6Sj70?t=168

Most people seem to use a hair dryer but I just poured hot water in. Probably better to use the hair dryer to avoid overflowing the pan.

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