I remember reading about these-a while back, the Israel;is were building them. basically, you dig out an area, sufficeint to make a shallow pond 9perhaps 6 foot deep). You then install heat exchanger coiuls at the bottom, and near the top of the pond. You then fill the pond about half full with very salty water, then finish filling with frah water. now, the sun shines on the pond, and heats the water at the bottom-because of the salt water’s density, the bottom water gets much hotter than the top water-and you can run a low-prerssure ammonia or freon turbine off the temperature difference.
My question; how efficient are these soilar ponds? Can you generate significant amounts of electricity from them? Do they only work in desert areas? how much do they cost to build-and once built-are they cheap to run?
He was a hell of a detective…
What? Oh, sorry.
According to Wickipedia they work reasonably well as they produce ‘free’ energy.
Initial cost is low. Excavate a pond, line with plastic, fill with salt and water.
Maintenence reqires adding water to make up for evaporation and removal of excess salt that accumulates.