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Message
1
Posted on 8/10/17 at 10:49 am to NOFOX
The motors are huge - like copper could 4-5 ft in diameter, old school stuff from 1910-1920 timeframe.
Also - the pumps at the lake at the end of 17th street canal cannot keep up with the interior one. The one at the interstate will need to be shut off to keep the canal from overflowing.
Also - the pumps at the lake at the end of 17th street canal cannot keep up with the interior one. The one at the interstate will need to be shut off to keep the canal from overflowing.
Posted on 8/10/17 at 10:50 am to colorchangintiger
quote:
Wow. I'm in the pump business and never have heard of anyone using 25Hz. Europe uses 50Hz. I can't imagine what the adder is to use a non-standard cycle.
It was initially selected as a compromise for use at Niagra Falls. I believe the main reason for using 25 over 50 (or 41 2/3) was that 25hz was much easier to convert to DC in the late 1800's-early 1900's.
Posted on 8/10/17 at 10:51 am to Napoleon
quote:
Well.. That explains it. 25 Hertz? Crap we use 60Hz in our AC electronics.
I'd imagine that they all use variable frequency drives (or at least they should), so the frequency of the input is fairly inconsequential. The AC signal (25hz, 50hz, 60hz, whatever) is rectified into a DC signal, then converted back into an AC signal (at whatever frequency you want) via an inverter.
I'm going through the National Electrical Code right now. Article 708, re: Critical Operations Power Systems. It puts some tight regulations on areas that are key to survival in emergencies, ie. hospitals, 911 call centers, etc...
I don't know for sure whether these S&WB plants fall into that category (there is no easily available list, I'd have to call the state to find out) but I'd bet they do.
These stand out:
708.6 Says that the authority having jurisdiction has to check the electrical systems of these facilities "periodically." It also requires documentation of these checks for maintenance. The dude claiming to work for S&WB that called into WWL earlier today said that some of the generators have been out of commission for years.
quote:
708.22A: "...A portable, temporary, or redundant alternative power source shall be available for use whenever the COPS power source it out of service for maintenance or repair.
So with 4 of the 5 (IIRC) generators out of service, none of the places had a backup generator.
Also
quote:
708.64 A facility with a COPS shall have documented an emerergency operations plan. The plan shall consider emergency operations and response, recovery, and continuity of operations.
Would love to read that.
Posted on 8/10/17 at 10:51 am to THRILLHO
quote:
I'd imagine that they all use variable frequency drives
I would doubt they do.
They really should though, I agree.
Posted on 8/10/17 at 10:56 am to Napoleon
quote:
something that should have been upgraded 75 years ago is to blame?
Speaking of that, you know who was:
In the louisiana state legislature 55 years ago
And
Head of City Council, At Large Council Member 50 year ago
And
The President of the Sewage and Water Board 47 years ago
And
The mayor 47 year ago
And
The US Secretary of housing and urban development 37 years ago?
Father and Mentor of Mitch Landrieu: Moon Landrieu.
But nothing is that family's fault. Oh no. They're innocent and angry just like the rest of us.
Posted on 8/10/17 at 10:59 am to tgrbaitn08
To be honest.
I always tell people pick the washer and get the matching dryer.
Dryers are so similarr from one company to the next.
I'd have to say the GE's while being the biggest are my least favorite due to the cheapness of the bearing (plastic and mylar).
The standard Whirlpool dryer would be my cheap to mud-priced go to. (Maytag, Whirlpool, Kenmore, Amana all very similar with Roper and Estate being the cheap versions)
I don't hate the Koreans for dryers, but do note that the Korean dryer failures tend to be electrical and more expensive while the American failures are mechanical or elctro-mechanical and cheaper to fix.
Of course Speed Queen is the best.
Though I would take a 10 year old Kenmore or Whirlpool over almost anything new today.
You won't really find many true lemons amongst dryers.
So my advice is find a sale. I am not one to like options and bells and whistles on appliances so I don't have good to say about Box Brand high end units.
I always tell people pick the washer and get the matching dryer.
Dryers are so similarr from one company to the next.
I'd have to say the GE's while being the biggest are my least favorite due to the cheapness of the bearing (plastic and mylar).
The standard Whirlpool dryer would be my cheap to mud-priced go to. (Maytag, Whirlpool, Kenmore, Amana all very similar with Roper and Estate being the cheap versions)
I don't hate the Koreans for dryers, but do note that the Korean dryer failures tend to be electrical and more expensive while the American failures are mechanical or elctro-mechanical and cheaper to fix.
Of course Speed Queen is the best.
Though I would take a 10 year old Kenmore or Whirlpool over almost anything new today.
You won't really find many true lemons amongst dryers.
So my advice is find a sale. I am not one to like options and bells and whistles on appliances so I don't have good to say about Box Brand high end units.
Posted on 8/10/17 at 11:01 am to Napoleon
quote:
I don't hate the Koreans
Very topical of you.
Posted on 8/10/17 at 11:15 am to eng08
quote:
Also - the pumps at the lake at the end of 17th street canal cannot keep up with the interior one. The one at the interstate will need to be shut off to keep the canal from overflowing.
Are you talking about the temporary pumps? The permanent pumps are rated at 12,600 cfs which is a good but more than the 10-11k cfs that pumps into the canal. Also the pumps at the lake end only come into play when the surge gates are closed.
This post was edited on 8/10/17 at 11:18 am
Posted on 8/10/17 at 11:25 am to NOFOX
Yes temporary ones, luckily we have no had a storm and the project is close to finishing.
Posted on 8/10/17 at 11:38 am to NOFOX
quote:
Are you talking about the temporary pumps? The permanent pumps are rated at 12,600 cfs which is a good but more than the 10-11k cfs that pumps into the canal. Also the pumps at the lake end only come into play when the surge gates are closed.
Are you sure they are 12,600 Cubic feet per second? That's a 5.6 million gallon a minute rate. That would pump out 8.5 Olympic swimming pools a minute. Not saying it's not correct but I've been around some big pumps and wow...that's huge.
Posted on 8/10/17 at 11:46 am to eng08
quote:
Yes temporary ones, luckily we have no had a storm and the project is close to finishing.
The temporary pumps are at ~9,300 cfs. I think the peak intake the canal has seen in the past 25 years is ~7000-8000cfs. Even though the interior pumps could theoretically move up to ~10,000cfs, I believe other bottlenecks in the drainage system would prevent that peak level from ever actually being reached.
This post was edited on 8/10/17 at 12:00 pm
Posted on 8/10/17 at 11:47 am to Breesus
I posted your incredibly insightful post on facebook and gave you a "shout out" crediting you with that wisdom. I'll be interested to see if it gets shared enough for you to see it. Thanks
Posted on 8/10/17 at 11:48 am to eitek1
quote:
Are you sure they are 12,600 Cubic feet per second? That's a 5.6 million gallon a minute rate. That would pump out 8.5 Olympic swimming pools a minute. Not saying it's not correct but I've been around some big pumps and wow...that's huge.
Yep:
quote:
When complete, the PCCP at 17th Street will consist of six 1,800 cubic feet per second (cfs) pumps and two 900 cfs pumps and have a total pumping capacity of 12,600 cfs.
Posted on 8/10/17 at 11:48 am to Breesus
I enjoyed that screed. One of the best. 
Posted on 8/10/17 at 11:58 am to Breesus
Breesus, no love for dear sister in that screed?
Posted on 8/10/17 at 12:01 pm to TigerstuckinMS
quote:
Breesus, no love for dear sister in that screed?
No. I have no love for her. She sold her state years ago for federal aspirations and has never held city office. She doesn't deserve a mention because she doesn't deserve a thought.
Posted on 8/10/17 at 12:02 pm to Napoleon
I worked on a proposal for the SWB back after Katrina to upgrade the pumps and increase reliability.
It was obvious to everyone who looked at the system that they need to upgrade the system to 60Hz. However, the SWB has a culture that puts a huge amount of pride in having a "unique" system.
They don't want to hear that their unique system costs more, takes longer to repair, and is less reliable than if they switched over to what everyone else uses.
It was obvious to everyone who looked at the system that they need to upgrade the system to 60Hz. However, the SWB has a culture that puts a huge amount of pride in having a "unique" system.
They don't want to hear that their unique system costs more, takes longer to repair, and is less reliable than if they switched over to what everyone else uses.
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