The Anonymous Widower

Malta Inc Energy Storage Explained

Malta Inc first came to my notice in 2018 and I wrote Gates Among Billionaires Backing Alphabet Energy Spinoff.

But I couldn’t find much information at the time, but they now have a web site that gives a good explanation.

This page on the web site is entitled Our Solution.

This infographic from the web page, lays out the key features.

This sentence outlines the method of operation.

The Malta energy storage system takes electricity, converts and stores that electricity as heat, and then converts it back to electricity to be redistributed on the electric grid. In charge mode, the system operates as a heat pump, storing electricity as heat in molten salt. In discharge mode, the system operates as a heat engine, using the stored heat to produce electricity.

The operation is explained in five stages.

  1. Collects – Energy is gathered from wind, solar, or fossil generators on the grid as electrical energy and sent to Malta’s energy storage system.
  2. Converts – The electricity drives a heat pump, which converts electrical energy into thermal energy by creating a temperature difference.
  3. Stores – The heat is then stored in molten salt, while the cold is stored in a chilled liquid.
  4. Reconverts – The temperature difference is converted back to electrical energy with a heat engine.
  5. Distributes – Electricity is sent back to the grid when it is needed.

Note.

  1. The operation of the system is based on well-understood thermodynamic principles.
  2. Entergy is stored as both heat and cold.
  3. It provides several hours of energy storage.
  4. Systems are built using standard components, that are readily available.

In some ways the Malta Inc PHES is based on similar principles to Highview Power’s CRYOBattery and Siemens Gamesa’s ETES.

Conclusion

This is a company to watch, as they seem to have got the technology right.

February 25, 2021 - Posted by | Energy, Energy Storage | , ,

2 Comments »

  1. I wonder what the efficiency is?

    Comment by Ben Oldfield | February 26, 2021 | Reply

  2. I wouldn’t be surprised to find it is quite good, as it uses hot and cold stores.

    Comment by AnonW | February 27, 2021 | Reply


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