Thermal storage

Popular mechanics
Letter by a person describing how he takes a galvanised tank and raps it in fiber glass. Finally sheets of polystyrene is rapped around the fiber glass enabling a storage tank that keeps hot water at the same temperature for two weeks.

Melting salt
Hot 400deg salt is added from the mini-containers at the focul point of multiple Fresnel Mirro Arrays(SolarLinks). Multiple containers is winched down from many Fresnel array mirror assemblies and manually emptied into the large hot molten salt container (1). This container is vacuum sealed allowing 24 hour operation.

Instead of pumps allow gravity to let the salt flow from 1, 2 to 3. Winch the one foot containers above 1 and empty into it. Salt pumps are very expensive and last only 5000 hours.

A heat exchanger is inserted into a smaller container(2),into which the 400degree salt is pumped from (1). Water is heated to pressurised 400degree Celsius steam through the heat exchanger which is in contact with the molten salts.

The salt that cools down to 300 or 200degree from storage tank(2), as it creates steam in the heat exchanger, is pumped to storage tank (3). (3) could also be the individual mini-containers taken down from the solar array to be reheated back to 400degrees celcius. Container(2) and (1) is maintained at a constant 400 degree celcius.

Using three containers is an improvement on attempting to create super heated steam at the focul point of the Fresnel Mirro Arrays. Instead the thermal energy is transferred at the focul point to similar size container(60liters) to MoltenSalts. The MoltenSalt isn't under any pressure since its boiling point is so high(400+ deg C).

Thus we we could have unlimited number of Fresnel mirror arrays lined up in a row to generate hundreds of kWh. The solution can easily scale to any size. A 50hektar plot would be enough to provide every house in Pretoria with a constant 1Kwh electricity. Each square meter receives about 1.2Kw thermal energy. Of this 20% is converted into electrical energy or 240watts/hour. A single 4x4 Fresnel array assembly generates 16000x0.2 = 3.2kwh electricity.