Thermally biased valve and anti-icing system
A valve includes an inlet, an outlet, and a biasing element. The biasing element includes a first spring element, a second spring element, and a valve element. The second spring element includes at least one bimetallic disk including a first and second material. The first material includes a first coefficient of linear thermal expansion, and the second material includes a second coefficient of linear thermal expansion different than the first coefficient of linear thermal expansion. The valve element disposed on an end of the first spring element.
1. A method of adjusting a fluid pressure regulation system with a first valve and a second valve, the method comprising:
directing a fluid into the first valve;
passing the fluid over a biasing element in the first valve;
transferring thermal energy either from the fluid to at least one bimetallic disk disposed in the biasing element or to the fluid from the at least one bimetallic disk, wherein the at least one bimetallic disk comprises a first metallic material on a concave side of the at least one bimetallic disk and a second metallic material on a convex side of the at least one bimetallic disk, further wherein the first metallic material has a first coefficient of linear thermal expansion greater than a second coefficient of linear thermal expansion of the second metallic material;
altering the curvature of the at least one bimetallic disk in response to a change in temperature of the fluid;
changing a spring force of the biasing element as a function of the altered curvature of the at least one bimetallic disk;
changing a pressure of the fluid exiting the first valve as a function of the changed spring force of the biasing element;
transferring fluid from the first valve to the second valve;
adjusting the second valve in response to the change in pressure of the fluid exiting the first valve;
altering a flow of the fluid out of the second valve as a function of the adjusted second valve;
transferring fluid from the second valve to a nacelle of an aircraft engine; and
transferring thermal energy from the fluid to the nacelle.
2. The method of claim 1 , the method further comprising:
transferring thermal energy from the fluid to each of the bimetallic disks;
decreasing the curvature of each of the bimetallic disks;
decreasing the spring force of the biasing element; and
increasing the pressure of the fluid exiting the first valve.
3. The method of claim 1 , the method further comprising:
transferring thermal energy to the fluid from each of the bimetallic disks;
increasing the curvature of each of the bimetallic disks;
increasing the spring force of the biasing element; and
decreasing the pressure of the fluid exiting the first valve.
4. The method of claim 1 , wherein adjusting the second valve further comprises actuating a valve element disposed within the second valve.
5. The method of claim 1 , the method further comprising:
reducing the build-up of ice on the nacelle in response to transferring thermal energy from the fluid.
6. The method of claim 1 , the method further comprising:
adjusting a pressure in an internal chamber of the second valve in response to the changed pressure of the fluid exiting the first valve;
adjusting the second valve in response to the adjusted pressure in the internal chamber of the second valve.