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What went wrong with the Texas power grid?

houstonchronicle.com

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Re: What went wrong with the Texas power grid?

#371
post #327
post #285

Earlier quoted context omitted.

Right, if you think about it almost all of the heat from the fire goes right up the chimney. The brick of the firebox & chimney are generally built outside the building envelope for safety reasons, so any heat in the brick doesn't warm the house. The only heat that actually makes its way into the house is the radiant heat cast from the fire itself, which is small. The smoke is poison, and unlike a furnace, gas firepl…

Why don't we run radiator water pipes across the chimney, to bring that heat back to the house?

There are designs that do this or things like it. In the US, though, it seems fireplaces are mostly an aesthetic feature and not a practical one.

Re: What went wrong with the Texas power grid?

#372
post #327
post #285

Earlier quoted context omitted.

Right, if you think about it almost all of the heat from the fire goes right up the chimney. The brick of the firebox & chimney are generally built outside the building envelope for safety reasons, so any heat in the brick doesn't warm the house. The only heat that actually makes its way into the house is the radiant heat cast from the fire itself, which is small. The smoke is poison, and unlike a furnace, gas firepl…

Why don't we run radiator water pipes across the chimney, to bring that heat back to the house?

This is a very old problem and there are solutions, like the Franklin stove [1]. However, we don’t really use fireplaces as a primary source of heat anymore. Their use is really more decorative. If they were really intended for heat generation, so one of the other posts mentioned, we would use a completely different design.

[1] https://en.m.wikipedia.org/wiki/Franklin_stove

Re: What went wrong with the Texas power grid?

#373
post #271

The Texas-only grid was definitely part of it, and should be a lesson to people who thought the lesson from Covid is "do more locally." No, having stronger, longer distance connections is what makes you more resilient, at least when there are local problems.

I think the big lesson here is “when you have extreme weather events, things can go wrong”. No more than that. To say this can always be avoided is misleading. When black swan events happen, shit goes bad.

I'm not sure this is a truly "black swan" event. Cold fronts that bring snow and cold temperatures to Texas are becoming more and more frequent. This is simply the worst one so far.

Re: What went wrong with the Texas power grid?

#374
post #20

Dallas suburb here (Las Colinas). No power since Monday 6am. I had to get room at holiday inn. I actually got the room yesterday, but the hotel lost power after an hour, so I had to go back home and sleep in 5 degree apartment. Don't believe anything you read about "rolling outages". It's only rolling, if you define that as "out until it's not freezing anymore".

Man, what are people with children, elderly, or pets doing.

Exactly.

Re: What went wrong with the Texas power grid?

#375

It is surprising that windfarms are freezing. Here in Quebec, we have windfarms that have more than 6 months a year of snow and temperatures much below the freezing point. How can they freeze? they dont use water or gaz or oil. It is only a fan and dynamo. Did water seep inside and freeze it?

Frozen wind turbines aren't the problem. https://www.texastribune.org/2021/02/16/texas-wind-turbines-...

Natural gas doesnt really freeze, so something else is going on here.

Misleading text in linked article: "We didn’t run out of natural gas, but we ran out of the ability to get natural gas. Pipelines in Texas don’t use cold insulation – so things were freezing."

Re: What went wrong with the Texas power grid?

#376

Earlier quoted context omitted.

I don't know why power demand is up in TX generally, but I do know that right now a big reason for the demand is because a lot of residences have electric resistance heat only-- which is great for electric blankets, but not so much for heating all the air in your home when it's extremely cold.

Why is it not good for heating? I'm sure resistance based electric heating is very efficient. I've lived in very cold places and the heat has almost always been electric or water heated by electric. You just need radiators. Northern European countries for example use that a lot and the temperatures are often as low as -22F. Of course they build to optimize for low temperatures unlike TX.

Resistance heating is 100% efficient and therefore basically the least-efficient method. Heat pumps have coefficients of performance well over 1.0, even when the outside air is below zero degrees.

Re: What went wrong with the Texas power grid?

#377

Did the utility companies ask for voluntary reduction in power consumption ahead of time? We had a situation here where extreme weather and a natural gas pumping station that exploded caused real problems in our natural gas supply. The utility asked everyone to lower their consumption by turning their heat down to 65. Luckily, that was the extent of the rationing.

I remember that. What an awful winter.

Re: What went wrong with the Texas power grid?

#378
post #213

Earlier quoted context omitted.

Anecdote: All 7 developers in my Houston team (semi-geographically scattered in the city) lost power; half for >24 hrs (it's 10-25 degrees F here for the last 2-3 days). Most lost water for some stretch of time and some still don't have it. I don't think any completely lost heat (most have gas) but at least one person found their gas fireplace they were hoping would heat them up when out of power didn't really work t…

We had an incident early this AM and of the eight people we paged, only one had power. I’ve been without power, heat, internet, water, or septic more than 90 minutes at a time for two days. My house was 44 degrees this morning when I woke up. Sunday night we were without power or heat for seven and a half hours. Our DR plan didn’t really account for all of our staff being on the same power grid!

>Our DR plan didn’t really account for all of our staff being on the same power grid

Yup. I hear you loud and clear.

Re: What went wrong with the Texas power grid?

#379
post #109

Did the utility companies ask for voluntary reduction in power consumption ahead of time? We had a situation here where extreme weather and a natural gas pumping station that exploded caused real problems in our natural gas supply. The utility asked everyone to lower their consumption by turning their heat down to 65. Luckily, that was the extent of the rationing.

Afaik, the way abnormal situations like these are handled in northern Europe is that the grid suppliers have agreements with the very large industrial consumers (think aluminium smelters) who agree to shut down immediately when the grid frequency goes below a certain trigger level. The way I understand it, this is useful both in time-critical emergencies (like keeping the grid at 50 Hz when a nuclear plant suddenly g…

The bitcoin mining farms claimed to shut down, so some industrial load shedding seems to be in play in Texas.

Re: What went wrong with the Texas power grid?

#380
post #285

Earlier quoted context omitted.

Right, if you think about it almost all of the heat from the fire goes right up the chimney. The brick of the firebox & chimney are generally built outside the building envelope for safety reasons, so any heat in the brick doesn't warm the house. The only heat that actually makes its way into the house is the radiant heat cast from the fire itself, which is small. The smoke is poison, and unlike a furnace, gas firepl…

This is why russian-style stoves have a whole labyrinth for the air to blow through, warming up the large brick structure. It can hold heat for a while even after it's done burning.

A bit OT, but I would have no idea about Russian-style stoves until I saw this video a few days ago. Amazing.

https://youtu.be/r_TO30jzyUA

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