# Thread: Molten Salt in a 3' by 8' tank

1. I'm working on a design for a CSP molten salt tower and need some help. I will have a solar receiver that will hold 12,100 pounds of saltpeter. I need to know how many solar arrays I need to get that salt to a temperature of 1050f.

I was hoping I could use 10 solar arrays generate 6000 BTU with a temperature of 1200 at the focal point. I was hoping that would be enough but have since learned temperature is not a good variable to use?

To first start the arrays need to have the salt salt reach temperature of 1050f in 10 hours, once the salt is liquid at 550f it will need to reach 1050f in 4 to 5 hours because of a 6 hour cycle.

Any Ideas?

Thank You,

2.

3. What's the heat capacity of salpeter, and how big do you expect your heat losses to be?

And what is the power generated by the solar arrays. You mention 6326100 or 6335220 Joule (never even heard of the unit BTU, apparently, but not surprisingly, there are two), but that is energy, which isn't useful if we don't know over what time span it is generated. And is it generated by all ten arrays together, or by each separately.

PS: Using SI units makes it easier to help you

4. This technology already exists – you seem to be trying to reinvent the wheel. (See Solar 2 near Barstow CA). Anyhow, what do you mean by 6000 Btu? This is a tiny amount of heat, and sort of meaningless unless you meant to say Btu/h which is equivalent to 1.75 kW – still tiny. Solar 2 used 2,000 heliostats to generate 10 MW so generating 1.75 kW should require less than one heliostat.

5. Originally Posted by Bunbury
This technology already exists – you seem to be trying to reinvent the wheel. (See Solar 2 near Barstow CA). Anyhow, what do you mean by 6000 Btu? This is a tiny amount of heat, and sort of meaningless unless you meant to say Btu/h which is equivalent to 1.75 kW – still tiny. Solar 2 used 2,000 heliostats to generate 10 MW so generating 1.75 kW should require less than one heliostat.
Sorry I will try to be clearer. I know that the tech exists. It is etimated that for each kilowatt of energy from a power plant it takes \$900 to \$2000 to build that plant.

I'm trying to reduce the cost. MIT came out with a solar array that for a low cost will generate a factor of 1000 suns( is this the SI index?)
"It's a 12-foot-square mirrored dish capable of concentrating sunlight by a factor of 1,000, built from simple, inexpensive industrial materials selected for price, durability and ease of assembly rather than for optimum performance."

"In the sunbelt, our dish would make about 10,000 peak watts of heat and 3,500 peak watts of electricity," he says

So I want to get funding to build a 6000 kilowatt CSP plant. Under current forecast that would be \$6 to 12 million dollers with half of the cost in arrays or helio-stats.

Where the design I have which will be redesign a little will generate "Teton Engineering Inc developed a 20,000 Btu (6000 watt) solar concentrator designed specifically for the backyard mechanic to build using simple construction and basic materials"

So this and other info based opoun info from Sandia and Solar Two is where I came up with the basics of my design. I AM NOT AN ENGINEER OR CLAIM TO BE. I am an inventor with an idea which WITH YOUR HELP WE WILL BE ABLE TO COME UP WITH SOLID NUMBERS. Please bear with me. Direct contact by phone or email might help if any one is interested. The design is for a CSP 6000 kilowatt molten salt tower using 6 hours of storage in a hot tank and cold tank design.

6. You need to pony up the bucks and hire a consultant and explain your system completely, any universities near you?

7. Originally Posted by Bunbury
This technology already exists – you seem to be trying to reinvent the wheel. (See Solar 2 near Barstow CA). Anyhow, what do you mean by 6000 Btu? This is a tiny amount of heat, and sort of meaningless unless you meant to say Btu/h which is equivalent to 1.75 kW – still tiny. Solar 2 used 2,000 heliostats to generate 10 MW so generating 1.75 kW should require less than one heliostat.
So if 2000 arrays generate 10MW is that per hour? Since the molten salt storage which was in a 30' by 80' tank would run the generator for 3 hours does that mean that 10 MWh? would reheat the salt from 550f back to 1050f in 3 hours?

8. Sorry, Joel, but take a reality check. You aren't going to raise \$6 to \$12 million dollars for an energy project when you don't understand what a MW is. You can't expect to get others to design your project by Q & A on the internet. Sorry to be blunt but you are not being realistic.

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