| 摘要 |
Electrical energy is stored in a concentrated solution. To recover the energy, the concentrated solution is rediluted for example by pressure retarded osmosis. The concentrated solution is generated by evaporation of the exhaust solution from the energy recovery process. The evaporation is enhanced by electrically powered enhancement means and the corresponding electrical input constitutes the power to be stored. The enhanced evaporation also draws heat from the environment, whereby the input electrical energy is augmented, partially or completely offsetting inefficiencies in the system. In grid applications, when demand for electricity is high the enhancement is discontinued and power is generated from the stored concentrated brine. Alternatively the evaporation enhancement may draw power from a power source that does not operate continuously, such as a renewable energy source. The stored brine is employed to generate power during periods when the renewable energy source falls below a predetermined power supply capability.
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