The windmill starts to pump water at a wind speed of 4 m/sec. The wind-wheel begins to rotate and makes the piston pump work, which is located in the bottom of the groundwater. The pump is driven by connecting rods from the wind-wheel, which go through the interior of galvanized tubes into the pump at the bottom of the groundwater.
The pump has a piston and a system of valves that impell the water into the tubes to the surface into a pool. One of the main characteristics of the piston pumps is that the pump would continue pumping water and air without being harmed in case the groundwater capacity is lower than what was foreseen.
The windmill transports the water and, if necessary, rises the water above the height of the tower. Thus, it is also necesarry to install a press-tows at the end of the tubes of the tower, to avoid water losses.
The TARRAGÓ windmills are protected against strong winds thanks to its automatic brake system. Apart from the automatic brake system, the windmill has a manual brake system at the bottom of the tower that allows to stop it easily at any moment.
- Water Supply for Villages. The use of windmills for the water supply in villages is year after year more common.
- Water Supply for Agriculture and Farms. The windmills suit in small plots as well as in large premises.
- Multi-Installations in Big Premises. In case of large premises, it is recommended to install more than one windmill (multi installation). The advantage of a multi installation is the possibility to extract water from all points of the premise.
- Installations in Small Premises. In case of small premises (greengrocer fields, vineyards, small farms…), the installation of a medium sized windmill like M-3009 and M-4012 (see models) is sufficient to ensure the coverage of water needs. In case of farms with high water needs, this installations supply the necessary water.
- Water Quality. Windmills pump water into small lakes (and other areas) to ensure appropriate levels of dissolved oxygen in waters. In many instances the water released from the reservoir will have lower concentrations of dissolved oxygen, at times totally devoid of it, causing mortality of aquatic organisms. Windmills are installed to provide a suitable quality and temperature for the downstream aquatic communities. An example of such an installation is in the natural park of Delta de l’Ebre (Tarragona, Spain). Recently it has been studied the application of windmills for the depuration and desalinition of water.
Other special applications of the windmill are:
- Water transfer among reservoirs in different levels.
- Drain of areas.
- Water supply to small sees, public gardens and fountains
- Water supply in natural parks
- Water supply to industries.
- Water cleaning and water recycling installations.