The Anonymous Widower

Tesla And PG&E Are Working On A Massive ‘Up To 1.1 GWh’ Powerpack Battery System

The title of this post, is the same as that of this article on electrek.

This is the first two paragraphs.

For the past few months, Tesla and CEO Elon Musk have been teasing a giant battery project that would dwarf even the company’s 129 MWh Powerpack project in Australia.

Today, we learn that Tesla is working with PG&E on a massive battery system with a capacity of “up to 1.1 GWh” in California.

It certainly, is a big lithium-ion battery.

  • It will be able to provide 182.5 MW for four hours.
  • It looks like it could be the largest  lithium-ion battery in the world.

It is worth comparing with the Castaic Power Plant, which is also in California.

  • This is a pumped storage plant.
  • It can produce 1566 MW and has a capacity of 12470 MWh.

This Google Map shows the plant.

Note.

  1. The power plant is also part of the California State Water Project, which transfer water from North to South.
  2. The low-lake is Elderberry Forebay to the East.
  3. The high-lake is Pyramid Lake to the North.

It is a complicated system that includes the Angeles Tunnel, which takes water between Pyramid Lake and the Castaic power plant.

It cost a lot more than the 1.1 GWh battery, but it can generate a lot more power.

 

April 5, 2021 Posted by | Energy, Energy Storage | , , , | Leave a comment

Piney Point: Emergency Crews Try To Plug Florida Toxic Wastewater Leak

The title of this post, is the same as that of this article on the BBC.

This is the introductory paragraph.

Emergency crews in Florida have been working to prevent a “catastrophic” flood after a leak was found in a large reservoir of toxic wastewater.

This Google Map shows the location.

Note.

  1. At the top of the map is an area called Tampa Bay Estuarine Ecosystem Rock Ponds.
  2. The reservoir appears to be in the South East corner of the map.
  3. There appear to be several chemical works to the West of the highway.

This second Google Map shows the reservoir at a larger scale.

Note.

  1. The picture in the BBC article was taken from the North West.
  2. The problem reservoir is right and above of centre.
  3. To its right is Lake Price, which appears to be the sort of lake to sail a boat and perhaps do a bit of fishing and swimming.
  4. Moore Lake to the South appears similar to Lake Price.

It looks to me that it is not the place to have an environmental incident.

This article in The Times says this.

Engineers are furiously pumping the phosphate-rich water into the sea to avoid an uncontrolled spill at Piney Point, whose failure could unleash a 20ft-high wall of toxic effluent.

Pumping it into the sea? Surely not?

I suspect there could have been a mixture of sloppy management and loose regulation, with minimal enforcement and I’ll be interested to see what recommendations are put forward by the inevitable investigation.

In my varied past, I was once indirectly involved, in the toxic waste that comes out of chemical plants. At the time, I was working for ICI in Runcorn and my main job was building designing and building instruments for the various chemical plants in and around Runcorn.

As they had hired me because of my programming skills, they asked me if I could do a few small jobs on their Ferranti Argus 500, which could be plugged in to both their Varian NMR machine and their AEI mass spectrometer.

With the former, to get better accuracy in analysis of chemicals, I would take successive scans of a sample and aggregate them together. The accuracy of the results would be proportion to the square root of the number of scans.

The second to my mind was more difficult and much more interesting.

This explanation of mass spectroscopy is from Wikipedia.

Mass spectrometry (MS) is an analytical technique that is used to measure the mass-to-charge ratio of ions. The results are typically presented as a mass spectrum, a plot of intensity as a function of the mass-to-charge ratio. Mass spectrometry is used in many different fields and is applied to pure samples as well as complex mixtures.

ICI at Runcorn had a lot of complex mixtures and the aim of my project, was to take a mass spectrum and automatically decide what chemicals were present in the mixture.

The mass spectra were presented as a long graph on a roll of thermal paper. I noticed that operators would pick out distinctive patterns on the graph, which they told me were distinctive patterns of chlorine ions.

Chlorine has an unusual atomic weight of 35.5 because it is a mixture of two stable isotypes Chlorine-35 and Chlorine-37, which produced these distinctive patterns on the spectra.

I was able to identify these patterns to determine the number of chlorine atoms in a compound. By giving the algorithm a clue in stating how many carbon, oxygen and hydrogen atoms could be involved, it was able to successfully identify what was in a complex mixture.

All this was programmed on computer with just 64K words of memory and a half-megabyte hard disc.

ICI must have been pleased, as I got a bonus.

One of the jobs the software was used for was to identify what chemicals were present in the lagoons alongside the River Weaver, which are shown today in this Google Map.

Note.

  1. The chemical works, which were part of ICI in the 1960s, to the North of the Weaver Navigation Canal.
  2. The two former lagoons between the canal and the River Weaver, which seem to have been cleaned out and partially restored.
  3. Was that a third large lagoon to the South of the River Weaver?
  4. There also appears to be a fourth smaller triangular lagoon between the canal and the river.

There certainly seems to have been a better clear-up in Runcorn, than in Florida.

I moved on from Runcorn soon after, I’d finished that software and have no idea how or if it developed and was used.

But the techniques I used stayed in my brain and were used at least four times in the future.

  • In the design of a Space Allocation Program for ICI Plastics Division.
  • In the design of two Project Management systems for Time Sharing Ltd.

And of course, they were also used in designing the scheduler in Artemis for Metier.

I

 

April 5, 2021 Posted by | Computing, Design, World | , , , , , , , , , | Leave a comment