Solar receiver and solar power system having coated conduit
View Patent ↗A solar receiver device includes a metal conduit and a glass container disposed around the metal conduit such that there is a space between the glass container and the conduit. A coating is disposed on the metal conduit and has a composition that includes at least one element from silicon, titanium, aluminum, barium, and samarium.
1. A solar receiver device comprising:
a metal conduit;
a glass container disposed around the metal conduit such that there is a space between the glass container and the metal conduit; and
a coating disposed on the metal conduit, the coating having a composition that includes oxides of silicon, titanium, aluminum, and barium, wherein the coating is a monolayer.
2. The solar receiver device as recited in claim 1 , wherein the composition includes an oxide of samarium.
3. The solar receiver device as recited in claim 1 , further comprising an oxide bond layer between the metal conduit and the coating.
4. The solar receiver device as recited in claim 3 , wherein the oxide bond layer is a chromate.
5. The solar receiver device as recited in claim 3 , wherein the oxide bond layer is alumina.
6. A solar receiver device comprising:
a metal conduit;
a glass container disposed around the metal conduit such that is a space between the glass container and the metal conduit; and
a coating disposed on the metal conduit, the coating having a composition including 24-68 wt. % oxide of silicon, 1-40 wt. % oxide of titanium, up to 20 wt. % oxide of aluminum, and 16-52 wt. % oxide of barium.
7. The solar receiver device as recited in claim 6 , including 34-58 wt. % oxide of silicon, 6-25.5 wt. % oxide of titanium, 5-10 wt. % oxide of alumina, and 26-42 wt. % oxide of barium.
8. The solar receiver device as recited in claim 7 , including 44-48 wt. % oxide of silicon, 11-14.5 wt. % oxide of titanium, 7-8 wt. % oxide of aluminum, 31-37 wt. % oxide of barium.
9. The solar receiver device as recited in claim 6 , further comprising 1-5 wt. % kaolinite clay, 0.1-5 wt. % oxide of chromium, and up to 5 wt. % bentonite clay.
10. The solar receiver device as recited in claim 9 , including about 3 wt. % kaolinite clay, about 1 wt. % oxide of chromium, and about 0.3 wt. % bentonite clay.
11. The solar receiver device as recited in claim 9 , further comprising 1-10 wt. % oxide of samarium.
12. The solar receiver as recited in claim 11 , including 2-6 wt. % oxide of samarium.
13. A solar power system comprising:
at least one solar receiver for carrying a working fluid;
at least one solar reflector for directing solar energy towards the at least one solar receiver to heat the working fluid; and
a power generator for receiving the heated working fluid and generating electricity, and wherein the at least one solar receiver includes a metal conduit, a glass container disposed around the metal conduit such that there is a space between the glass container and the conduit, and a coating disposed on the metal conduit, the coating having a composition including 24-68 wt. % oxide of silicon, 1-40 wt. % oxide of titanium, up to 20 wt. % oxide of aluminum, and 16-52 wt. % oxide of barium.
14. A method of processing a solar receiver device, comprising:
forming a coating on a metal conduit that is to be disposed within a glass container around the metal conduit such that there is a space between the glass container and the conduit, the coating being formed with a composition that includes 24-68 wt. % oxide of silicon, 1-40 wt. % oxide of titanium, up to 20 wt. % oxide of aluminum, and 16-52 wt. % oxide of barium.
15. The method as recited in claim 14 , wherein the forming of the coating includes casting the coating using a slurry.
16. The method as recited in claim 14 , further including chromizing or aluminizing the metal conduit prior to forming the coating to form an oxide bond coat on the metal conduit.
17. A solar receiver device comprising:
a metal conduit;
a glass container around the metal conduit such that there is a space between the glass container and the metal conduit; and
a coating disposed on an inner surface of the metal conduit, the coating having a composition that includes oxides of silicon, titanium, aluminum, and barium.
18. A solar receiver device comprising:
a metal conduit;
a glass container disposed around the metal conduit such that there is a space between the glass container and the metal conduit; and
a coating disposed on the metal conduit, the coating having a composition that includes oxides of silicon, titanium, aluminum, and 16-52 wt. % oxide of barium.