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A solar water heater. Based on a manual published by WOT. It may be helpful in constructing solar collectors and building hot water systems especially for communities using large quantities of hot water.

Windmill Blades - Diameter 1.5 to 3 m

DIY equipment to pump water using a Savonius turbine and a diaphragm pump

Vertical Axis Sail Windmill - Diameter 3 m

Tubular Plastic Biodigester

Solar Water Heater with Serpentine Collector

A Solar Water Heater with a Corrugated Metal Collector

Solar Food Dryer for Vegetables

A small 5 kW water turbine based on the research of Dr. Mohammad Durali at MIT. According to the original development, the equipment would be used to feed an electrical network (coffee farm in South America), which is why they have selected a 60Hz generator, however, I believe that this can be adapted to the needs of whoever is going to replicate it. In any case, the same original design was followed.

Segner Turbine for 4m Pit

Savonius Rotor with Two Blade Levels

Savonius Rotor of 1m Diameter

Parabolic Solar Cooker with Aluminium Reflector

Lattice Tower Mast for Wind Turbine

Horizontal Shaft Turbine With Security Tail

Pelton type open impeller waterwheel for dynamo electric power generation (Grinder not included)

Floating Dome Biodigestor

High efficiency, DIY solar water heater panel with basic tools and materials

A complete cross-flow turbine assembly

Axial Flow Turbine 25kW