Fresnel solar concentrator model

test model of a solar concentrator for the Hackaton Sunny day 2014 in Kiev.
This model of concentrator bases on Fresnel lens principle. Total yearly solar energy gain would get 3040 kWh as for Kiev. Total lens area is about 1.638 sqm. This gadget can be used domestically for heating water as well as for transformation it by Stirling steam engine into electricity.