What is hybrid solar lighting and how does it work?
A..Hybrid solar lighting is a tube of natural solar lighting enhanced by a reflective coating with two optical plastic fibres and a photosensor. Where hybrid solar lighting has been used in commercial building it has improved daytime lighting illumination and slashed lighting electricity costs by up to 60%. Q..Explain how to make water using a water windmill. A..The water windmill invented by Dr Max Whisson of Perth, Western Australia is essentially a bunch of vertical fan blades powered by the wind. Air from the fan is blown over refrigerated plates and water in the air is extracted as dew and runs down to a collection tank. Dr Whisson says that this device could extract heaps of fresh water from the air anywhere in the world except at the North and South Poles where the air is dry. Q..Give some examples of solar powered devices that could be run in places like the West African savannah where there is no electricity. A..Solar panel/battery charging systems for lighting, radio and sola
