| 摘要 |
A fuel tank system comprising a fuel tank with a device having a fuel inlet and a water outlet. A water-permeable material such as a grapheme oxide membrane allows water from a typical fuel supply (a fuel/water mix) to pass through the outlet but prevents the fuel component from exiting. The water is returned to the fuel tank. The device may be a valve such as a butterfly, ball 200 or flap valve where water collecting in a low-point of the valve can exit through a filter (fig 14, 320) of the water-permeable membrane. The device 3 can be associated with a pressure sensor and so have a sensor outlet 34 to communicate pressure changes within a fuel pump. A low-point in the device 3 can have the water-permeable material at a sump or U-bend to allow water to drain out from the reservoir or plenum. Water permeable material can be grapheme oxide, typically a layer structure of crystallites with an array of nanoholes such as carbon nanotubes. Use in an aircraft fuel tank system reduces water in the fuel mix which may freeze and expand increasing local pressure. Prevents false sensor readings. |
