371–380 of 384 posts
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You don't really notice 1000ppm, and unless you have some ventilation going you can probably reach that quite quickly in your car. I am not saying that it didn't work out or that it was reckless. Just make sure you have adequate ventilation.
Just as an indicator, you can get up to 5,000 ppm with two passengers in a car after an hour's worth of driving.
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How do you safely handle dry ice? I'm legitimately asking, I know retailers sell it with big warning labels but I wouldn't know how to transport it, move it, and similar.
Other people are giving good advice, but you should also know that it isn't that dangerous. People have died from the fumes, but only when they have a lot of dry ice in an enclosed area (e.g. a car). It can cause explosions, but that's mostly from people going out of their way to build bombs. It can cause burns, but not instantly and the pain will warn you before you get seriously injured. Don't be particularly afrai…
You needn't use your real name, of course, but for HN to be a community, users need some identity for other users to relate to. Otherwise we may as well have no usernames and no community, and that would be a different kind of forum. https://hn.algolia.com/?sort=byDate&dateRange=all&type=comme...
Hi. Actualexperience here... it depends on the ambient temperature and how much stuff is in said freezer. So heres a data point: Freezer: normal upper level refrigerator freezer chock full of frozen fish caught on holiday in Alaska. Place, Time: Houston, TX, Late Summer, Hurricane Igor just hit and knocked our power out for 14 days. Findings: We kept the freezer shut and at about 4-5 days the fish was noticeably thaw…
Houstonian here — did you mean Hurricane Ike (Sept. 2008)? Hurricane Igor (Sept. 2010) hit Canada, not Houston. https://en.wikipedia.org/wiki/Hurricane_Igor (In Hurricane Ike, we lost power for seven days, and ice and dry ice at the local grocery stores were rationed. We have a gas range and a gas grill in the backyard hooked to the natural-gas line. Every night for the first few nights, quite a few neighbors came ov…
Related but tangential anecdote: When we went on our honeymoon my mother in law came around and left our freezer full of delicious meat, fish all sorts. But then inexplicably turned off the freezer electricity switch on her way out. 2 weeks later my little sister cane around to leave us some milk in the fridge for our return. Only to find the entire kitchen wreaking of rotting meat and water and other crap all over t…
You had your freezer on a switched outlet?
If you put a lot of stuff in them at a time, they will need to be run overnight (>12hrs) to freeze them down hard. If you do not freeze the contents completely at first, it may not ever freeze, because if it doesn't store the latent energy of freezing the freezer won't have enough thermal inertia to remain below freezing during the 20 hours of rest.
On very rainy periods, we can go about 48 hours from the end of the last freeze cycle before any significant melting occurs.
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Yes, given the thermal mass of a fridge any type of advanced control is probably pointless. I think late 90s/early 2000s was the peak of fridge reliability to efficiency ratio. They run the defrost timer through the thermostat, so defrost cycles are somewhat inline with fridge use. The circuitry is simple - a defrost timer, PTC "relay", a few thermostats and the compressor. Newer fridges are a bit quieter and more ef…
Well, theoretically you could just use 3-phase motors, right? I'd actually like that, and over here in Germany, most homes have a 3-phase supply in the kitchen for an electric stovetop.
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When there's no airflow in the refrigerator, then it takes a long time to chill food, the reverse of how a blast chiller can chill food really quickly by moving lots of air. But maybe the water chills the air to make up for this, IDK. It would be interesting to experiment.
I can say that if I load up my fridge, especially the top it will freeze up the fan and stop working altogether. Airflow is essential if you have a poorly designed Samsung where it’s a common problem to ice over.
Hi. Actualexperience here... it depends on the ambient temperature and how much stuff is in said freezer. So heres a data point: Freezer: normal upper level refrigerator freezer chock full of frozen fish caught on holiday in Alaska. Place, Time: Houston, TX, Late Summer, Hurricane Igor just hit and knocked our power out for 14 days. Findings: We kept the freezer shut and at about 4-5 days the fish was noticeably thaw…
PSA: I've worked disaster relief/reconstruction in Houston, New Orleans, and a few other places. If you come across a fridge with the doors taped shut DO NOT OPEN IT. If you come home after power was lost for more than a day or so, TAPE THE DOORS OF YOUR FRIDGE SHUT AND DO NOT OPEN IT. It's not worth it. You will never make the fridge use-able again. If you have to leave ahead of a disaster, consider emptying your fr…
Soooo many students were like "This fridge is a loss" and would just give them to me.
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White & glowing. You're trying to drive off all the black bits.
Well, you're not driving off the "black bits". There's still plenty of "black bits" (unburned carbon and high-carbon compounds) in the interior. It's just that 1. you really really want to wait until the lighter fluid is burned off and 2. the whole surface hasn't started burning until the whole surface has started generating white ash. In the case of charcoal with igniter integrated in the outer layer ("match light"…