Riken and others designed the use of solar Fresnel lens cogeneration system

And by using water to store heat, energy can be stored stably.Below the heat exchanger is a tank filled with water, and the engine USES the change in cylinder volume to generate rotational energy.Specifically, the advantages of this co-generation system are.The heat exchanger heats and stores heat for the water, allowing energy to be recovered efficiently from sunrise to sunset, regardless of whether the sun shines from the side or from above.The Fresnel lens, which is thin but can concentrate light efficiently, is based on a telescopic lens being developed to observe ultra-high energy cosmic rays.In 2014, a 10-kilowatt empirical system with a surface roughness of 20 nanometers was constructed, configured on the top and sides of the cube (the structure is called "FresnelSunHouse").

The cube is equipped with an inverted t-shaped heat exchanger made of aluminum alloy to receive the light gathered by Fresnel lens. The sensor lens can be extracted at any time when needed.All can efficiently extract heat, using the heat of the sun's rays, where the warm water generated will be supplied to a "rotary heat engine" developed by Da Vinci to generate electricity.Rotary heat engines drive their engines by converting freon substitutes as a hot medium into gases.Riken intends to work with local governments and others in the future, so that even at low pressures generated by cold sources, thermal efficiency is excellent, and the heat is released when needed for power generation and hot water supply.It can be driven even at temperatures around 40 ° c.It can be promoted and applied as a small and medium-sized distributed power source to use idle land, and the solar energy can be utilized with relatively large changes without expensive solar tracking devices and driving devices. The working principle of this system is that no matter what Angle of incidence of the sun's rays.By combining the Fresnel lens with concentric circular grooves into cubes, it is planned to launch a trial production machine with an output power of 1 kw in 2013, which is of high transparency and high precision.