APPARATUS FOR REMOVAL OF IONS, BI-DIRECTIONAL POWER CONVERTER AND METHOD OF OPERATING AN APPARATUS FOR REMOVAL OF IONS

摘要

The invention relates to an apparatus for removal of ions. The apparatus being provided with: a water inlet (7) for letting water in the apparatus; a water outlet (9) for letting water out of the apparatus; a capacitor, and; a spacer (11) for separating a first (13) and a second electrode (15) from the capacitor and allowing water to flow in between the electrodes. The apparatus has a power converter (PC) for converting a supply voltage of a power source (PS) to a charging voltage for charging the capacitor. The power converter is constructed and arranged for energy recovery from the capacitor by converting the voltage on the capacitor to the supply voltage of the power source (PS).