New Mars Forums

Similar to above diagram, the heat exchanger would be a CO2 snow maker.
Maybe, coat the heat exchanger with teflon to prevent sticking.

Latent heat of vaporization of one cubic meter of liquid H2 ;
http://www.uigi.com/hydrogen.html
71*446/3600 =  8.8 Kilowatt hours.
In addition, there is the gas phase Specific Heat (Cp) = 14.34  kJ/kg °C
(71*14.34/3600 = 0.28 KWH / m^3 °C)
which also contributes, at lower fficiency.
 

Protein Poisoning is more of a problem than deficiency:
http://www.arthritis-back-knee-pain-fre … otein.html

On various islands in the Pacific are tribes of people who have followed the same diet for dozens of generations; fruits, roots and tubers. They enjoy excellent health and consume about 15 grams of protein a day.
http://www.rawfoodexplained.com/protein … -need.html

Algae and fungi for maximum use of resources.
Add large variety of grains.
Eat the snails and goldfish in the aquarium.
And for more muscle, try a big earthworm.
http://www.google.com/search?q=largest+ … era&rls=en

Astronaut training, for those few who enjoy the diet.
Only short monks, with a small rice bowls, need apply ?

Saddam's curse is the US version of the Midas touch.
People commute endlessly to get away from each other.
And it all turns to pullution.

With all the sunlight, Arizona is a good place to paraform a Garden of Eden.
Martian style greenhouse living, a most modern and efficient city.
 

 
I see it in 2 steps.

Near Earth,
High power engines for low Earth orbit insertion.
Present designs, and possibly beamed power later.

Interplanetary,
Ion drive and plasma engines are here, but without a high power source.
Solar power satellites are needed to beam the power, but the cost is high.
http://en.wikipedia.org/wiki/Solar_power_satellite
 

http://www.google.com/search?hs=f4&hl=e … tnG=Search

Fog sinks.
But if you could design a molecule with directional kinematics.
Absorb incoming light molecule, then eject toward gravitatinal attraction.
Floating the utility fog molecule, forming a containment vessel.
 

Better is supporting cables forming equilateral triangles.
If a vertex gets knocked out, then tension is transferred
to the perimiter of a hexagon.

I saw an apartment building with 3 hallways radiating from the center.
A 10 storey building could be placed at each corner of the honeycomb.
http://insectzoo.msstate.edu/Curriculum … ycomb.html

Looks possible to build a relatively safe and large city.
 

     Pressure vessel design (tubes and spheres) necessary on Mars but not Earth.
     Shielding with light elements (Hydrogen, possibly Boron) reduce secondary emission.

     Plastic has lot of Hydrogen atoms. Proton is similar mass to neutron. Good momentum transfer. 
     However, light pipes may provide a way to allow light while blocking radiation.

     On Earth you only have to design for gravity.
     On Mars for gravity and pressure (hoop stress).

     Pressure up and down cancel, eliminating hoop stress.

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Building big on Mars is inviting catastrophy. Perhaps only smaller sections which could be sealed off. Probability of large meteor hit should be greater than a million years. What is maximum radius for that ?
     

In order to simplify have to go back to karov's ideas of

Geodesic - triangles for stability
Water layer on top for shielding

======================

10 km radius ring
cables from 3 different directions, to form the triangles
Water jacket on top, to balance air pressure
3 sided towers at each cable intersection  ?

======================

Then destroy as many meteors as possible in space.
Figure out how to repair damage from the ones that get through.

 
Instead of water, the working fluid is protons and electrons.
Hydrogen bonds have collapsed but other bonds are stronger.

The monsters spend their time watching TV from Earth and
designing alternate fluid bodies with their quantum computers.

Then a solution is found.
 

 
http://www2.jpl.nasa.gov/galileo/jupiter/interior.html

A Sea of Liquid Hydrogen 40,000 km deep, metallic.
What kind of monsters devising ways to get out ?
 

Spherical cap shape has problems.  Is it possible ? Worth the efffort ?
Slowly inflate as stadium air domes on Earth ?
Cables to ancor each portion ?

Living under a giant fish tank, with shielding and food production right above.
Practical when small, but how to scale up ?

Ground hugging solutions are easiest.
Perhaps only several meters high.
 

How did you get the on location scenes ?
Did the creatures in the metallic hydrogen assist ?
What is the temperature at the core ?