Solar ponds

06/04/17

“How can we generate solar energy using ponds?”

 

It is well known that we can generate solar energy using photovoltaics and concentrated solar thermal, but is there another way? Well, let’s use our scientific mindset to find out. First, let’s collect a pool of salt water. Because of the salinity gradient between the top and bottom layer, there will be a noticeable temperature gradient (usually of around 30 degrees at the top and 90 degrees at the bottom). This temperature gradient can then be exploited with a thermocouple to produce an electrical current, thereby inducing electrical power! This system is known as a solar pond and is popular in developing countries for its low cost