Sun GeneralSolar Power for a Better World

Solar Storage Salt

Why is the Australian government ignoring solar ponds?

Apparently there is an experimental saline gradient pond, at Pyramid Salt. I have investegated this, there are 100s around the world used for generating electricity. The heat at the bottom of the pond is used to heat propane, which changes state at 70 degreses. I it is contained in a high perresure vesell, in this high pressure state it drives the blades of a turbine. Which could be of similar constuction to a turbo on an engine. This then drives an electrical anternator (a/c) or generator (d/c). also waste heat can be used to drive a distillation plant. The hot gas is then goes through a refridgeration system and returned to storage. No propane is used.

Hi. Probably because of it's low efficiency. "The energy obtained is in the form of low grade heat of 70 to 80 °C compared to a 20 °C ambient temperature, which has an upper Carnot-cycle extractable efficiency of 1-(273.15+20)/(273.15+80)=15%. By comparison a solar concentrator system with molten salt delivering high grade heat at 800 °C would be able to convert 73% of absorbed solar heat into useful work, and be forced to divest only 27% as waste heat to the cold temperature reservoir (ambient air.)"

Solar Power Plants

Harnessing sun radiation to generate electricity is an evolutionary process that is accelerating. Electricity is the most flexible and convenient form of energy to use.

Making your own solar and wind power for less than $200

We can consider Electrical Power Systems as a network with generation nodes (power plants), long haul transmission lines (Super High Voltage Power Lines) and distribution lines (the lines that feed homes and business enterprises).

Solar Energy main advantage is that it is clean and renewable.

There are 3 constraints though that limit the growth pace of Solar Power Plants production capacity:

1. The Capital Investment in solar power plant per 1MW (megawatt) production capacity is still higher than the cost of other power plants, leading to higher price to the consumer

2. Solar Power Plants require a relatively larger land and sunny areas; Naturally deserts and arid areas are most suitable. Deserts however are remote from the dense population areas. This lead to the necessity to run new Super High Voltage Power Lines, not a trivial project because of environmental objections and regulatory processes.

3. Solar radiations is intermittent and available only during the day; Electricity storage technology is not well developed.

Making your own solar and wind power for less than $200

The remedies are:

1. Prices of solar power plants are going down with improved technologies and larger scale plants.

2. Build smaller community size clean energy plants closer to the consumers and encourage residential solar power systems.

3. Develop better technologies to store energy.

The existing storage technologies don't store electricity; they convert electricity to other energy type during the day and convert it back during night to electricity

To name a few:

1. Use heat to melt salt during the day and use the melted salt to heat water to high pressure steam that will run the steam turbine over night.

2. Pump water up hill during the day and run the water down hill over night to drive an hydro turbine (An existing dam can be used).

Making your own solar and wind power for less than $200

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