A Non-Conventional source doesn't interact with objects.
non conventional
You don't. There is no difference in the type of energy, between the "conventional" and "non-conventional" types. What makes energy conventional or non-conventional is the SOURCE - a conventional source being one that has been used for a long time.
wind
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non conventional energy = renewable energy http://en.wikipedia.org/wiki/Renewable_energy
There is no absolute hard and fast definition. But I would say coal, oil, and natural gas, and hydro are conventional. Wind, solar, tidal, and biomass non-conventional. I'm not sure about nuclear.
Is it non-conventional food or non-conventional source? To me, non-conventional food is food I don't normally eat. A non-conventional source would be some way of producing food using non-conventional farming methods, I suppose
No, wind energy is a non-conventional, or unconventional source of energy. Conventional sources of energy are coal, oil, natural gas and uranium.
Non Conventional Source of Energy
This is difficult to decide I think. It has been available for 50 years now - does that make it conventional? It is a well established and reliable energy source.
the bio gas that the algae produce is the energy source.
Definition of conventional and non conventional energy