Originally Posted by amor de cosmos
is it possible for a beach to be cool geothermally? what if pipes went out under the water & back under the beach? Could that work?
Yes, but the pipes would need to be very close to the surface of the sand... Heat rises...
There are a number of instances of using pipes in deep water to circulate air and cool buildings. I would imagine Dubai would find this much more effective than trying to cool sand from below.
I guess the main question is whether the water near Dubai gets deep quickly or stays shallow for a long distance before becoming deep. For example, in the Florida Keys, the water doesn't get more than about 50 feet deep until you are 7 or 8 miles offshore - and then it gets very deep very quickly. With the warm water, using the water for cooling would probably not work at all. Compare that to Toronto, where the water is almost 300 feet deep at around 2 miles from the shore. The water is very cold and thus their cooling system works very well.