| 摘要 |
The present invention relates to a method and a system of energy recovery and/or cooling in at least one electrolysis cells ( 1 ) for the production of a metal, in particular aluminium, where the cell(s) is provided with one or more heat exchangers and where a heat exchange medium circulates through said heat exchanger(s) and is further directed to at least one heat conversion unit, such as an open circuit expander turbine ( 3 ). The expander turbine is connected with a compressor ( 2 ) that supplies the heat exchange medium to the cells ( 1, 51 ). In one embodiment, a second expander turbine ( 40 ) is connected to a generator ( 41 ) that can be applied for production of electricity. The system is substantially self propelled and the heat exchange medium is preferably air applied in an open circuit.
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