"Geothermal energy comes from two sources: from radioactive decay in the crust of the earth, and from heat trickling through the mantle from the earth’s core"[1]. Also accoridn to McKay, there is an optimum depth at which we could suck out heat, which was found to be 15km below the earth. An idea heat engine would deliver 17mW/m^2. And the world population density of 43 people per sq km. would make it 10kWh per person per day (if all land area were used). The population density for Kuwait is 167.53 using the population of Kuwait (2985000 people) divded by the sq km of Kuwait (17818km^2) [2].
Now we can determine the geothermal power for Kuwait based on McKay's numbers: 2.422 kWh/d per person.
[1] McKay book.
[2]http://en.wikipedia.org/wiki/List_of_sovereign_states_and_dependent_territories_by_population_density
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