August 12, 2013

Hyperloop Capsule

Elon Musk revealed the details of his Hyperloop transportation concept. Here are details of about the capsule and compressor.

Hyperloop Passenger Capsule

The maximum width is 4.43 ft (1.35 m) and maximum height is 6.11 ft (1.10 m). With rounded corners, this is equivalent to a 15 ft^2 (1.4 m^2) frontal area, not including any propulsion or suspension components.

The aerodynamic power requirements at 700 mph (1,130 kph) is around only 134 hp (100kW) with a drag force of only 72 lbf(320N),or about the same force as the weight of one oversizedchecked bag at the airport.

The doors on each side will open in a gullwing (or possibly sliding) manner to allow easy access during loading and unloading. The luggage compartment will be at the front or rear of the capsule.

The overall structure weight is expected to be near 6,800 lb (3,100 kg) including the luggage compartments and door mechanism. The overall cost of the structure including manufacturing is targeted to be no more than $245,000

The tesla motors pdf copy could get overloaded. Here is the pdf on Spacex

Hyperloop Passenger Capsule
1. Tube air is compressed with a compression ratio of 20:1 via an axial compressor.
2. Up to 60% of this air is bypassed:

a. The air travels via a narrow tube near bottom of the capsule to the tail.
b. A nozzle at the tail expands the flow generating thrust to mitigate some of the small amounts of aerodynamic and bearing drag.
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.
a. This air is stored in onboard composite overwrap pressure vessels.
b. The stored air is eventually consumed by the air bearings to maintain distance between the capsule and tube walls.

4.An onboard water tank is used for cooling of the air.

a. Water is pumped at 0.30lb/s (0.14 kg/s) through two intercoolers (639 lb or 290 kg total mass of coolant).
b.The steam is stored onboard until reaching the station.
c.Water and steam tanks are changed automatically at each stop.

5. The compressor is powered by a 436 hp (325 kW) onboard electric motor:

a.The motor has an estimated mass of 372 lb (169 kg), which includes power electronics.

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 powe

c. Onboard batteries are changed at each stop and charged at the stations

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