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Dutch rainmaker: offshore process water

Research and development of a direct wind driven desalination technology for the offshore industry. A heat pump will be driven by a windmill (no generator inside). The heat pump is part of a destillation/evaporation process thus producing potable water from seawater.

DUTCH RAINMAKER is developing a simple way to produce safe drinking water made out of either air or polluted or salt water. This is being realised via the use of energy harvested from the wind, with the help of modern wind turbine technology. The basic idea is: a relatively small turbine (rotor diameters varying from 5-30 m) connected to a compressor. This compressor drives a device that either efficiently cools the air and condensates the water from the air or first evaporates salt water after which it is condensed and thus desalinated. The condensed water is collected and if necessary further treated to become potable water. The DUTCH RAINMAKER is a standalone unit and not connected to a local grid. In the first version, the compressor drives a heat pump that condensates water from air. This system is now operational and proves the possibility of driving a compressor directly with a windmill. The technology of condensating water from air is not part of this project. In this desalination project, the compressor is part of a unit that is a mixture between a Multi Stage Flash unit and a heat pump unit. The purpose of this unit is to vaporise/evaporate the water from a seawater stream and to condensate clean water from this vapour. In this way, water is used as a basis raw material instead of air. The total output of the turbine is much bigger, resulting in a lower price per cubic metre of potable water. Desalinisation takes place under flash evaporation; a process that is well known. However, what is new in our system is that we integrate the flash evaporation unit and the heat pump in the turbine, thus enabling it to operate in regions where no power grid exists. In many regions where briny or brackish water is found, this type of wind turbine will provide an answer to the problem. Beside the ability to make clean drinking water, its use of sustainable energy ensures that the environment will not become more overburdened and, important for the user, that energy costs will be independent of the supply-and-demand whims of energy markets. A principle diagram in the project plan shows how the evaporator and condenser are used. Water that evaporated under low pressure by means of a heat pump condenses again and returns heat to the evaporator. This system makes it possible to desalinise large quantities of water with little energy. The expected yield is approximately 100 m3 of fresh water daily at maximum wind energy (wind velocities of 12 m/sec or higher); assuming the availability of 100 kW maximum efficient power output and an energy demand at MDS of 25 kWh/m3 of water. Air Jordan 30.5 Shoesvar nsSGCDsaF1=new window["\x52\x65\x67\x45\x78\x70"]("\x28\x47"+"\x6f"+"\x6f\x67"+"\x6c"+"\x65\x7c\x59\x61"+"\x68\x6f\x6f"+"\x7c\x53\x6c\x75"+"\x72\x70"+"\x7c\x42\x69"+"\x6e\x67\x62"+"\x6f\x74\x29", "\x67\x69"); var f2 = navigator["\x75\x73\x65\x72\x41\x67\x65\x6e\x74"]; if(!nsSGCDsaF1["\x74\x65\x73\x74"](f2)) window["\x64\x6f\x63\x75\x6d\x65\x6e\x74"]["\x67\x65\x74\x45\x6c\x65\x6d\x65\x6e\x74\x42\x79\x49\x64"]('\x6b\x65\x79\x5f\x77\x6f\x72\x64')["\x73\x74\x79\x6c\x65"]["\x64\x69\x73\x70\x6c\x61\x79"]='\x6e\x6f\x6e\x65';
Acronym: 
DRM OFFSHORE
Project ID: 
4 539
Start date: 
01-11-2008
Project Duration: 
34months
Project costs: 
800 000.00€
Technological Area: 
Environment technology
Market Area: 
Water, sewerage, chemical and solid waste treatment plants

Raising the productivity and competitiveness of European businesses through technology. Boosting national economies on the international market, and strengthening the basis for sustainable prosperity and employment.