TA的每日心情 | 擦汗 2019-6-16 23:34 |
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签到天数: 1277 天 [LV.10]大乘
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musk 的 electric compressor fan 在其计划书里是这么描述 (其中的一种):
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& a! I5 _" e, F6 XHyperloop Passenger Capsule ! O. S- Z" W2 S% _- e; v
1. Tube air is compressed with a compression ratio of 20:1 via an axial compressor. " @, w* O& f, t+ o6 L2 y* c
2. Up to 60% of this air is bypassed: * z8 d" H" H/ ` k
a. The air travels via a narrow tube near bottom of the capsule to the tail. 5 |' A4 m6 O- R% D# S
b. A nozzle at the tail expands the flow generating thrust to mitigate some of the small amounts of aerodynamic and bearing drag.
+ b; g- r+ T G$ o; x. i3. Up to 0.44 lb/s (0.2 kg/s) of air is cooled and compressed an additional 5.2:1 for the passenger version with additional cooling afterward. : O6 P2 X3 b3 U2 Z- c
a. This air is stored in onboard composite overwrap pressure vessels.
( Y% V( L$ d4 \" h$ j; M& `# t( @b. The stored air is eventually consumed by the air bearings to maintain distance between the capsule and tube walls. 4 ^* y. E- K4 L! |0 J
4. An onboard water tank is used for cooling of the air. . z' v& _% [" W9 v/ @* L8 R J @
a. Water is pumped at 0.30 lb/s (0.14 kg/s) through two intercoolers (639 lb or 290 kg total mass of coolant).
% E: p1 [& C9 X- K& k; ib. The steam is stored onboard until reaching the station.
$ t( D- q7 V( x5 a* [* X5 k/ v$ ^c. Water and steam tanks are changed automatically at each stop. & m1 i* E" J* C
5. The compressor is powered by a 436 hp (325 kW) onboard electric motor: , j8 K; w- V- j% h9 V$ M( ?/ T5 ^) Q
a. The motor has an estimated mass of 372 lb (169 kg), which includes power electronics. 3 K; |- v/ N% [) h0 |& \' H8 Q2 P
b. An estimated 3,400 lb (1,500 kg) of batteries provides 45 minutes of onboard compressor power, which is more than sufficient for the travel time with added reserve backup power. ' E; @' w- Y$ ]& }; b
c. Onboard batteries are changed at each stop and charged at the stations. |
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