by Twilight » Thu 05 Jun 2008, 03:08:59
$this->bbcode_second_pass_quote('BigTex', 'A')nother thing I hadn't thought about much was that the spread of prosperity in some areas is probably a lot more energy intensive than others.
Exactly. Not all parts of the world start from the same level of viability, so it makes perfect sense that reaching a given standard of inhabitability requires different energy inputs to overcome local obstacles.
Take water. A lot of power stations in the ME Gulf are correctly described as
power and desalination plants. From the beginning, they are designed to fulfill both functions. Not just power, but desalination! If I recall correctly, somewhere in Saudi Arabia there is a water pipeline hundreds of kilometres long, rising far above sea level, which may hold some sort of record.
Whereas somewhere like the UK, water capture consists of surface reservoirs provided by natural lakes or concrete dams refilled by precipitation. The water still has to be treated at the end of its journey and at some stage pumped against gravity, but there is no corresponding ongoing production stage energy input - it is absent. Or more accurately, we get to freeload off nature to some extent.
yesplease is correct in that their existing ownership of this resource makes choosing PV and the like unnecessary. That is why in spite of recent investments in renewables research in those parts, the real cash is going into stuff like this. It is an easy choice to make, they do not lose much. And in this case, unlike in the case of Kuwait, this is a very small portion of Saudi oil production. But this type of thing does add up, and long term their actual output is not getting any higher, in spite of fanciful claims about capacity.
One small point though, it is by no means a valid assumption that these are peaker plants. In the case of Jizan at least, power and desalination, so by definition baseload. Others could be peakers, but this type of thing is commonly run as baseload over there. In the UK too, the proportion of gas turbines in the generation mix and increasing unreliability of nuclear is such that gas turbines are run without much variation. So we cannot really know one way or another without further information. But in the grand scheme of things I suppose it does not matter.