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):" m( Q/ g" U- {5 c, y# f3 ]5 m6 g7 v
1 Q f U0 ?% h) y% a) r; `- d. qHyperloop Passenger Capsule + b" P4 G( q- e" i* |0 s0 U
1. Tube air is compressed with a compression ratio of 20:1 via an axial compressor. & |5 ~! T- T4 j5 v/ n( F
2. Up to 60% of this air is bypassed:
* L+ ?6 q, _7 B5 u3 j) ra. The air travels via a narrow tube near bottom of the capsule to the tail.
$ L0 y$ W; ]( Rb. A nozzle at the tail expands the flow generating thrust to mitigate some of the small amounts of aerodynamic and bearing drag. 3 B4 r; W/ l% @( ^: k1 w: e
3. 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.
8 H! X3 s, A3 b- a; `1 Ua. This air is stored in onboard composite overwrap pressure vessels.
/ p+ X& l B7 ~7 }2 j/ |5 [5 | o. `b. The stored air is eventually consumed by the air bearings to maintain distance between the capsule and tube walls. 9 q% X. h, z$ M X% k
4. An onboard water tank is used for cooling of the air. 8 c# p% s( ?- i/ }9 F0 Y& w
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). % D5 A: Y2 p7 y& h7 x/ y
b. The steam is stored onboard until reaching the station. 8 t7 n9 g( n. j) Z7 a! ~) f/ K: r
c. Water and steam tanks are changed automatically at each stop.
% p$ h: `9 y, `& K }& d4 R: C5. The compressor is powered by a 436 hp (325 kW) onboard electric motor: $ q& _, X% r5 U
a. The motor has an estimated mass of 372 lb (169 kg), which includes power electronics.
- E+ }+ V) m- f# n' Gb. 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. 8 p9 j9 ~5 O1 E' A& W+ X. `. @
c. Onboard batteries are changed at each stop and charged at the stations. |
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