Danfoss A/s

Lars Bjarne Hilbrecht

Georg Enevoldsen

Francisco Javier Lorenzo

A reverse osmosis () system having a first membrane unit () and at least a second membrane unit (), the membrane units () forming a chain of membrane units, the first membrane unit () having a first membrane () separating a first feed chamber () and a first permeate chamber (), a first inlet () connected to the first feed chamber (), a first permeate outlet () connected to the first permeate chamber (), and a first concentrate outlet () connected to the first feed chamber (), the second membrane unit () having a second membrane () separating a second feed chamber () and a second permeate chamber (), a second inlet () connected to the second feed chamber (), a second permeate outlet () connected to the second permeate chamber (), and a second concentrate outlet () connected to the second feed chamber (), wherein the concentrate outlet () of a membrane unit () in the chain of membrane units is connected to an inlet () of a following membrane unit () and a concentrate outlet () of at least one membrane unit () downstream the first membrane unit () in the chain of membrane units is connected to a hydraulic motor (). In such a system the energy consumption should be optimized. To this end the hydraulic motor () is operatively connected to a first electric machine ().

Reverse osmosis system

A reverse osmosis arrangement is described, the first chamber () having a first port () and a second port () and the second chamber () being connected to a permeate outlet (), wherein the first port () is connected to a first pump (). Such a reverse osmosis arrangement should be operated with high efficiency. To this end the second port () is connected to a second pump ().

Reverse osmosis arrangement

Reverse osmosis () system having a first membrane unit () and at least a second membrane unit (), the membrane units () forming a chain of membrane units, the first membrane unit () having a first membrane () separating a first feed chamber () and a first permeate chamber (), a first inlet () connected to the first feed chamber (), a first permeate outlet () connected to the first permeate chamber (), and a first concentrate outlet () connected to the first feed chamber (), the second membrane unit () having a second membrane () separating a second feed chamber () and a second permeate chamber (), a second inlet () connected to the second feed chamber (), a second permeate outlet () connected to the second permeate chamber (), and a second concentrate outlet () connected to the second feed chamber (), wherein the concentrate outlet () of a membrane unit () in the chain of membrane units is connected to an inlet () of a following membrane unit () and a concentrate outlet () of at least one membrane unit () downstream the first membrane unit () in the chain of membrane units is connected to a hydraulic motor (). In such a system the energy consumption should be optimized. To this end the hydraulic motor () is operatively connected to a first electric machine ().

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Nordborg, Denmark

Lars Bjarne Hilbrecht