Ocean thermal energy conversion (OTEC) uses the temperature difference between cooler deep and warmer shallow or surface seawaters to run a heat engine and produce useful work, usually in the form of electricity.
Abiotic examples include things that are not alive but you will find in an ecosystem such as air, gases, water, sand, stones and rocks.
Abiotic factors are the non-living factors in an ecosystem that  effect the survival of organisms in the ecosystem. Light,  temperature, and atmospheric gases are the exampl â¦ es of Abiotic  factors. Another example would be a forest fire.