Key Aspects

While the EnPot technology allows for going both up and down by similar amounts, for some smelters it will be impossible to go beyond their current energy use ceiling. A large number of smelters will be able to however, albeit with some infrastructure upgrades. It could be predicted that the ability to go both up and
down would become a design prerequisite on any new smelter constructed in the future. Read more.

opens the energy use window

EnPot enables opening of the operating window for the pots, allowing heat loss from the pot shell to be regulated and controlled from the sidewall of the cell. This allows stable ledge profile to be maintained under varying load conditions.

The amperage can be increased and decreased beyond design limits for extended periods of time (months). Read more.

creates new opportunities

Dynamic control of pot line energy use allows smelters to to significantly vary their electricity use to take advantage of market conditions. While each smelter has its own specific set of circumstances, some smelters will be able to utilise the new EnPot technology to;

  • maximise profits by varying energy use to take advantage of peak and non-peak power prices, or
  • maximise profits by reducing energy use during peak power prices and returning/selling the excess power to the grid, and then making up for lost production by increasing production during low energy cost times, or
  • enter the power supply market with their own power generation. Read more.

increases energy efficiency in the normal operating window

The EnPot system gives smelter operators ability to smooth out energy use and production in the normal operating window, enabling smoother, cost effective operations and significant energy savings. Read more.

Non-Invasive and Retrofittable installation

Air based, heat exchanger units are custom designed to be retrofitted to any existing pot design including pots with fins by way of spring loading which ensures they are totally non-invasive and can be installed without interrupting production.

Each exchanger design is site specific and custom designed requiring full assessment of pot design, operations and performance as part of the design process. Suction fans are used to draw air through the exchanger units. The use of air as the heat transfer medium ensures ease of installation and operation, whilst eliminating any explosion risks that liquid mediums may pose. Read more.

DELAYS SOLIDIFICATION in case of serious power failures

Design is optimised to achieve maximum heat removal from the critical zones when amperage is increased and maximum insulating capability when amperage is decreased. The more coverage the greater the control over the pots heat balance. Being able to insulate the pots delays the solidification of the molten liquid in the case of a serious power failure, giving up to twice the time available to prepare for a shutdown. Read more.

 
Control of the air flow through the exchangers, controls the heat transfer coefficient (HTC) at the shell wall.

Control of the air flow through the exchangers, controls the heat transfer coefficient (HTC) at the shell wall.

EnPot Control of airflow