EP4041437A1 - Installation d'osmose inverse à alimentation photovoltaïque pour la production d'eau potable - Google Patents

Installation d'osmose inverse à alimentation photovoltaïque pour la production d'eau potable

Info

Publication number
EP4041437A1
EP4041437A1 EP20800010.9A EP20800010A EP4041437A1 EP 4041437 A1 EP4041437 A1 EP 4041437A1 EP 20800010 A EP20800010 A EP 20800010A EP 4041437 A1 EP4041437 A1 EP 4041437A1
Authority
EP
European Patent Office
Prior art keywords
reverse osmosis
osmosis system
operated
photovoltaically
pressure pump
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP20800010.9A
Other languages
German (de)
English (en)
Inventor
Ali Al-Hakim
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Boreal Light GmbH
Original Assignee
Boreal Light GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Boreal Light GmbH filed Critical Boreal Light GmbH
Publication of EP4041437A1 publication Critical patent/EP4041437A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
    • B01D61/12—Controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2311/00—Details relating to membrane separation process operations and control
    • B01D2311/20—Power consumption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2313/00—Details relating to membrane modules or apparatus
    • B01D2313/36—Energy sources
    • B01D2313/365—Electrical sources
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2313/00—Details relating to membrane modules or apparatus
    • B01D2313/36—Energy sources
    • B01D2313/367—Renewable energy sources, e.g. wind or solar sources
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124—Water desalination
    • Y02A20/131—Reverse-osmosis

Definitions

  • the invention relates to a photovoltaically operated reverse osmosis system for the production of drinking water.
  • One possible remedy is, among other things. in desalinating sea or brackish water and making it available as treated drinking water as food and / or for irrigation of agricultural land.
  • One possible technique for desalination and treatment of such water is the use of reverse osmosis.
  • reverse osmosis the water to be treated is pressed through a semipermeable membrane under high pressure (reverse osmosis pressure), which is higher than the osmotic pressure of the water to be treated.
  • reverse osmosis pressure high pressure
  • the direct current voltage of the solar power therefore requires the use of components that can be operated with direct current, such as pumps with direct current motors, which are more costly and also more prone to failure.
  • DC motors are not available, it is alternatively possible to store the solar energy in at least three battery strings and to convert the uniform battery current stored in the battery strings into a three-phase AC voltage via three inverters. This allows the cheaper asynchronous motors can be used, but the purchase price and the maintenance intensity of battery-based storage systems counteract this advantage.
  • the object on which the invention is based was to remedy the named disadvantages of known reverse osmosis systems.
  • the invention relates to a photovoltaically operated reverse osmosis system for producing drinking water.
  • the reverse osmosis system has a photovoltaic system for generating direct current solar power, a reverse osmosis unit and an alternating current-operated pressure pump with an asynchronous motor for generating the pressure required for reverse osmosis.
  • the reverse osmosis system is characterized in that a modified frequency converter is set up between the pressure pump and the photovoltaic system, which combines the properties of an inverter and a converter and converts the solar power in such a way that the pressure pump, in particular its asynchronous motor, can be operated dynamically can be operated depending on the available solar voltage energy.
  • “Dynamically operable” means that the asynchronous motor is operated depending on the intensity of the solar radiation and thus depending on the temporarily available solar energy or solar voltage energy. The power generated by the asynchronous motor decreases or increases with the current energy generation of the photovoltaic system.
  • the pressure pump is in particular a high pressure pump with which a reverse osmosis pressure of 3 bar to 90 bar, in particular 15 bar to 60 bar, can be generated.
  • the frequency of the asynchronous motor of the system-internal pressure pump is dependent on the solar energy provided by the photovoltaic system, its available Amount is directly dependent on the intensity of the solar radiation, adapted by the modified frequency converter so that the reverse osmosis system according to the invention works without batteries and the use of DC motors.
  • the modified frequency converter has the technical property of simultaneously
  • the modified frequency converter differs from commercially available frequency converters in particular in the technical features listed below.
  • the following modifications can be present individually or in combination:
  • the solar voltage generated by the photovoltaic system is clamped to the intermediate circuit of the modified frequency converter in such a way that the diode voltage of the modified frequency converter, which is generated from alternating current, is bridged, and / or
  • the voltage conversion that can be generated by the modified frequency converter is specified for a defined frequency range FlZmin ⁇ Hzx ⁇ FlZmax
  • the photovoltaically operated reverse osmosis system is designed in such a way that the pumps are switched off when Flz min is not reached and are only switched on again when sufficient voltage is available again.
  • a commercially available frequency converter can also be used to provide a modified frequency converter, which is modified according to the technical features described here.
  • the reverse osmosis system comprises, in particular, a water tank for storing the drinking water generated by the reverse osmosis system.
  • all hydraulic connections of the reverse osmosis system are designed to be screwable, so that only screwdrivers and / or open-ended wrenches are required for setting up and dismantling the reverse osmosis system.
  • the necessity of only simple tools offers advantages in that the reverse osmosis system can be repaired easily and inexpensively in the event of a defect, or it could also be relocated within a short time if this is necessary. In particular, welding can then be dispensed with.
  • the metallic components of the reverse osmosis system are preferably made of a suitable stainless steel.
  • the photovoltaically operated reverse osmosis system has at least two pumps, namely a high-pressure pump and a water-supplying pump.
  • the photovoltaically operated reverse osmosis system is designed in such a way that the intensity of the sun is distributed to the existing pumps in such a way that the high-pressure pump is the master and the water-supplying pump is the slave.
  • the photovoltaically operated reverse osmosis system is configured in such a way that the speed of the pumps is regulated by the maximum permissible membrane pressure and the conductivity of the inlet and outlet water. If the maximum permissible diaphragm pressure is exceeded, the pressure drops the speed of the pressure-generating pump, for example around 2.0 Hz to 5 Hz, in particular around 3.5 Hz.
  • the photovoltaically operated reverse osmosis system is designed in such a way that the frequency of the pumps describes a straight line, the slope of which is formed by the quotient of Hz max and Hz m in.
  • the speed of the pumps corresponds graphically to a straight line.
  • the slope m of the straight line is dependent
  • the photovoltaically operated reverse osmosis system is operated “hybrid”, that is to say with alternating current and direct current.
  • a load break switch is available for this purpose, which is fed in with both types of voltage, whereby the diode bridge is not bridged in alternating current mode.
  • various parameters of the photovoltaically operated reverse osmosis system can be read out by means of a smartphone, which parameters are recorded by the system's control software.
  • Such parameters can be: the water pressure in the membrane, the conductivity of the water in the inlet and outlet of the reverse osmosis unit, the speed of pumps, the amount of water generated, the amount of water inlet, the current intermediate circuit voltage and the temperature of the frequency converter.
  • the parameters mentioned can represent the current parameters and / or parameters stored during the operation of the system.
  • the invention relates to a method for providing drinking water, in particular the photovoltaically operated reverse osmosis system described here being used.
  • the invention relates to a kit for producing the photovoltaically operated reverse osmosis system described here.
  • the kit includes in particular a modified frequency converter of the type described here.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Nanotechnology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

L'invention concerne une installation d'osmose inverse à alimentation photovoltaïque pour la production d'eau potable, qui peut fonctionner de manière autonome. Cette installation d'osmose inverse comprend une installation photovoltaïque destinée à produire de l'électricité solaire en courant continu, une unité d'osmose inverse et une pompe de pression pouvant fonctionner avec un courant alternatif et servant à produire la pression nécessaire à l'osmose inverse. Selon l'invention, un convertisseur de fréquence est agencé entre la pompe de pression et l'installation photovoltaïque, lequel associe les propriétés d'un onduleur et d'un convertisseur et convertit l'électricité solaire de telle sorte que la pompe de pression pouvant fonctionner avec un courant alternatif peut fonctionner de manière dynamique en fonction de l'énergie de tension solaire disponible.
EP20800010.9A 2019-10-11 2020-10-09 Installation d'osmose inverse à alimentation photovoltaïque pour la production d'eau potable Pending EP4041437A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019127421.4A DE102019127421A1 (de) 2019-10-11 2019-10-11 Photovoltaisch betriebene Umkehrosmoseanlage zur Erzeugung von Trinkwasser
PCT/EP2020/078361 WO2021069634A1 (fr) 2019-10-11 2020-10-09 Installation d'osmose inverse à alimentation photovoltaïque pour la production d'eau potable

Publications (1)

Publication Number Publication Date
EP4041437A1 true EP4041437A1 (fr) 2022-08-17

Family

ID=73040019

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20800010.9A Pending EP4041437A1 (fr) 2019-10-11 2020-10-09 Installation d'osmose inverse à alimentation photovoltaïque pour la production d'eau potable

Country Status (3)

Country Link
EP (1) EP4041437A1 (fr)
DE (1) DE102019127421A1 (fr)
WO (1) WO2021069634A1 (fr)

Also Published As

Publication number Publication date
WO2021069634A1 (fr) 2021-04-15
DE102019127421A1 (de) 2021-04-15

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