pneumatic capsule pipeline & maglev for the moon? by w. b. lee president / the od co., ltd....
TRANSCRIPT
Pneumatic Capsule Pipeline & Maglev
for the Moon?By
W. B. LEEPresident / The OD Co., Ltd.
Dasan Conference 2010, Jeju
October 27, 2010
Table of Contents
1. Terrestrial Mineral Transportation Technologies
2. The Lunar Environment
3. Transportation System for Lunar Regolith
1. Terrestrial Mineral Transportation Technologies
Truck Train
Pneumatic Conveying
Capsule Pipeline
Conveyor
2. The Lunar Environment
Property Measurement Comment
Air Vacuum No atmosphere
Temperature-233℃ to
123℃
Mean 107℃/day
-153℃/night
Magnetic field
0Earth 24-56
A/m
Humidity No Yes
Gravity 1/6 earth g=9.8 ㎨
Atmospheric pressure
10¯¹⁴ TorrEarth
760mmHg1Torr=1mmHg
◆ Minerals in Lunar Regolith
Mineral Percent (%)
SiO2 47.3
TiO2 1.6
Al2O3 17.8
Fe2O3 -
FeO 10.5
MnO 0.1
CaO 11.4
Na2O 0.7
K2O 0.6
P2O5 -
Total 100
1) Design factors
2) Transportation by vehicles
3) Pneumatic transportation4) PCP (Pneumatic Capsule Pipeline)
5) Electromagnetic drives
6) Maglev (Magnetic Levitation)
8) Lunar train
7) Propulsion system for Maglev
9) Concept
3. Transportation System for Lunar Regolith
1) Design Factors
EconomicalViabibilty
► High transportation cost ► Construction cost► Material Cost ► life-cycle cost
Construction
► Construction & installation must be easy
Maintenance
► Simple preventive maintenance► Easy repairs
Operation► Automatic► Switch to remote control
Weight► Use of ISRU (In-Site Resource Utilization)► On site fabrication with ISRU
Energy►Overall low energy need► Reuse, recycle
⇒For gaining high value output (He3, etc.) from Lunar regolith
: Mining -> Transportation -> Extraction
2) Transportation by Vehicles
◆ Issues
1. The surface is very soft. 2. There are a lot of craters on the moon’s surface.3. Dust
▶ Result: Therefore it is difficult to move by truck wheel on the surface with high speed.
3) Pneumatic Transportation
◆ Issues to consider for mineral “blowing”
1. Blower speed efficiency2. Wear & tear due to friction (velocity of particles 15-20m/sec (54-72Km/hr)
3. Pipe sizing 4. Cyclone
◆ Applications
Mail, hospital, bank (money)
4) PCP (Pneumatic Capsule Pipeline)
◆ Advantages of pipeline
1) Low linefill rate (3%) Reasons of low linefill rate. ► Blowers block the passage of the capsules. ► In-line loading & unloading.
2) Low speed (9m/sec)
=> Traditional PCP is not economical.
1) No pollution (noise, dust, spillage)2) No traffic jam
◆ Disadvantages (Used in Japan)
5) Electromagnetic Drives
◆ Advantages 1. The linefill of CP systems with electromagnetic drive can
be 15%, fivefold increase in comparison to PCP2. Loading & unloading of capsules must be done outside the pipeline.3. Velocity of capsules is about 15m/sec, higher than PCP (9m/sec).
▶ Result: CP is more economical system than PCP
*Electromagnetic drives : LIM or LSM
6) Maglev (Magnetic Levitation)
Electric traditional motor
Linear motor
Attraction
Repulsion
Maglev is using LIM or LSM system for propulsion.
Maintenance
Low cost =>There are no components that would wear out. There is no friction.
NoiseLow noise=>There are no wheels running along there is no wheel noise. But noise due to air disturbance still occurs.
Speed High speed : 500km/hr (LSM)
Magnetic
◆ Maglev Overall Strengths
7) Propulsion Systems for Maglev
LIM(Linear Induction Motor)
LSM(Linear Synchronous Motor)
Position of stator & rotor
Stator - - trainRotor - - Guideway (rail)
Stator - - Guideway (rail)Rotor - - train
Constructioncost
Low High
Control equipment
Simple (easy) Complex (difficult)
Speed Low (100km/h) High (500km/hr)
Stator
Rotor Stator
RotorLIM LSM
8) Lunar Train
Advantages Earth Moon
Environment
For protection of environmental pollution - - noise, spillage of material, dust
Not issue(In case of transportation)
Air drag To avoid air drag No air -> No air drag.
Traffic Without traffic jam No traffic
Speed 54-72km/hr by LSM in pipeline
•100km/hr by LIM•500km/hr by LSM
Pipe Yes No
9) Concept
1) No pipeline
2) LIM system is reasonable for transportation in the moon. - 100km/hr is speed is reasonable - Construction cost is cheaper than LSM. 3) Maglev transportation system with monorail
