| 摘要 |
An airplane is provided. The airplane includes an environmental control system (100) that provides a pressurized medium to a chamber of the airplane. The airplane also includes a bleed system (400). The bleed system (400) includes a plurality of ports (415,420,425), each of which can provide a bleed medium from an engine of the airplane to the environmental control system (100). The plurality of ports includes at least a first port (415), a second port (420), and a third port (425). The first port (415) is selected for an idle condition. The second port (420) is selected for a hot day cruise condition. The third port (425) is selected for a standard operating condition. The bleed system (400) can operate in a first mode, a second mode, or a third mode to provide the bleed medium to the environmental control system from the first port (415), the second port (420), or the third port (425) respectively. |
