Friday, 5 September 2014

Pg 9

                                                Food
1. Food while journeying to Mars:
Food is packed and stored in the space shuttle 2 or 3 days before a trip. Many types of space food are dehydrated, or freeze-dried, and sealed. Dehydrated foods include soup, casseroles, vegetables, cereal, and many other foods. This type of food could be rehydrated and heated up, and would be ready to eat. Freeze-dried foods were mainly bite-sized cubes or freeze-dried powders, but astronauts found this to be unappetizing and this was later removed, thus this type of food is not recommended. Sealed foods like the spoon-bowl were used during Apollo missions (1868-1975) and were more appetizing compared to the types of food before it. It also allowed more normal eating practices as food could be kept in special plastic zip-closure containers, and its moisture allowed it to stick to a spoon. At the Skylab space station (1973-1974), the larger space allowed an on-board refrigerator and freezer, which allowed perishable and frozen items to be stored. Menus included items such as processed meat products and ice cream. A dining room table and chairs, fastened to the floor and fitted with foot and thigh restraints, allowed for a more normal eating experience. This mode of eating in space while travelling to the red planet is most highly recommended. http://en.wikipedia.org/wiki/Space_food


2. Food after arriving on Mars:
A new source of food will be required to keep the astronauts alive. Food and other resources can be sent from Earth but the journey takes about 8 months, thus only one or no trips are recommended. For the first few weeks on Mars, the astronauts will rely on the leftover food which was packed on Earth, while they carry out agriculture in the form of vertical gardening to grow edible crops in space farms. The space farms will produce the main supply of the food grown in outer space, and the astronauts will have a vegetarian diet that consists of fruits and vegetables. A plant highly recommended is corn. Corn can be grown at the top few floors of the space farm as it requires full sunlight. Half of the yield can be eaten and the other half can be used to make bioethanol to generate electricity.


3. The types of crops we plan on planting:
a)Vegetables
Corn, wheat, rice, potatoes, tapiocas and tomatoes. We chose corn because they are tasty and do not require too much attention, only suitable conditions are needed, and corn can also be used to generate a fraction of the electricity on Mars. We chose wheat as it is easy to grow (though it takes a while before it is harvestable) and can be used to make bread and cereal. We chose rice because it is a staple food and can be a main source of food (though it takes a while before it is harvestable as well). We chose potatoes and tapiocas as they can be used to make a number of foods and can be eaten in a number of ways, eg: mashed potato, baked potato, boiled tapioca, tapioca chips, etc, and can be harvested every 2 months after they reach maturity, thus the astronauts can obtain food whenever they need it. Tomatoes are also chosen as they are tasty and well-liked.


b)Fruits
Apples, strawberries, blueberries, blackberries, raspberries, honeyberries, black currants and red currants. We chose apples as they are very popular and well-known, and are fairly easy to grow. We chose strawberries, blueberries, blackberries, raspberries and honeyberries as these are very easy to grow and can be harvested in very short periods of time, and in abundant numbers. Then we chose black and red currants as they are also fairly easy to grow, and can be used to make biscuits and other desserts. All these fruits can also be freezed and kept fresh for a long time. Most of all, we chose the fruits because they taste nice and the astronauts will be able to enjoy a variety of tasty fruits even when they are in space.


c)Beans
Soybeans. Soybeans are easy to plant and can be harvested 45 to 65 days after planting. We chose it because it is the number one protein-rich crop, and the astronauts can get the protein they lack from meat out of soybeans, which are even healthier as they contain less fats. The soybeans can even be used to produce soybean milk and soybean curd, which are both very easy to make.



4. Some recipes or foods with the fruits, vegetables and beans we are growing:
a) Cereal (with the wheat and some berries), cornbread (with the wheat and corn), and biscuits (made from wheat and berries or currants).
b) A delightful, main meal can be rice (staple food) with soup (made from corn, tomatoes and tapioca), with fruit juice (from the fruits grown) or soybean milk as a beverage and a fruit salad (with the different types of fruits grown) or soybean curd as dessert.






                                               Water
No.
When consumed
Type of water
1.
To be consumed during journey to Mars
Fresh water from Earth
2.
Water consumed after arriving on Mars and during trips to the planet poles to obtain frozen water
Leftover water from the trip and clean, recycled water from shower and other uses of water will be used while the astronauts try to obtain a new supply of water from the planet poles.
3.
Water supply on Mars
Water collected from the planet poles and purified is stored and consumed by the astronauts using special equipment.


1. Fresh water from earth will be stored in the space shuttle to be consumed during the journey to Mars.
2. After arriving on Mars, the astronauts’ water supply would be running out, so they would have to depend on the leftover of their water, and on water recycled from other uses of it while they try to obtain a new water supply from the planet poles.
3. To survive on Mars, the astronauts can collect ice from the planet poles, heat it and purify it to obtain clean and drinkable water.




                                                   Oxygen
no.
When used
How oxygen will be used
1.
Journey from Earth to Mars
Some oxygen will be supplied to the people and the rest kept in oxygen containment tanks.
2.
Arriving at Mars
The leftover oxygen will be used while the astronauts try to obtain a new supply of oxygen from plants.
3.
At Mars
Oxygen produced by plants through photosynthesis grown inside the dome will be supplied throughout the dome constantly.

Pg 8

1. Used water can be recycled by using a sewage system to collect all the used water to be purified again.
2. Certain vegetarian food leftovers can be left to decompose to form compost to act as an additional source of fertilisers.
3. Our faeces can be collected in a special bin to allow the methane inside the faeces to undergo combustion and to be converted into electricity.
4. Other types of waste eg: unused food waste will be thrown into a trashbin that will be collected every few days. The waste can be dumped at a dump site outside the biosphere.

Pg 7

Features:
1. Chilled water pipes underground to conserve energy needed to keep Biosphere cool during summer.
2. Some of the eleven Supertrees have photovoltaic cells on them and can store solar energy which they absorb in the day, and can convert the energy into electricity to power up machines and lights at night. This can be used by the space farm as well (which we plan to have).
3. Double-glazed windows to retain heat given off by appliances and other objects when it is nighttime or when it is cold outside, thus conserving energy required to heat up the living areas (for cold days).
4. A fraction of the biosphere (we target 3000m2) can be used to build a solar farm to trap light energy in the day, to be converted into  electricity. This will be the main source of electricity on Mars.
5. Corn can be grown in the space farm and half of it can be used to make bioethanol to generate energy to be used in the form of electricity through a process called dry milling.
6. Wind farms can be built outside the domes to convert the strong winds on the Martian surface into electrical energy.
7. Our faeces can be stored in a special bin to allow the methane inside the faeces to undergo combustion and to be converted into electricity.This can serve as a small fraction of the generation of energy.


Scientific principle applied:
1. Thermal stratification: A strategy of cooling only the lower levels of the Biosphere, while warm air rises and is vented out at higher levels.
2. Photo-voltage: The ability to capture and store light energy, and convert it into electricity to be used later.
3. Insulation of heat: The ability, for some materials, to reflect heat, not absorb it, so that it can be used for warming the people when it is cold outside.
4. Photovoltage: The solar panels trap solar energy and convert it into electricity to be used.
5. Bioethanol: An alcohol made by fermentation, mostly from carbohydrates produced in sugar or starch crops such as corn, sugarcane, or sweet sorghum.
6. Wind energy: The wind causes the wind turbines to spin and turn a generator to produce electricity.
7. Methane combustion: The methane in the faeces undergoes combustion to be converted into electricity.


Pg 5

Total area:12500 square metres


Area
Description of how the area will be used
2000m2
Vertical farming can be carried out in space farms and space will be saved by stacking floors of agriculture on top of each other. Multiple buildings can be built and each floor will be 2000m2.
The top of the building can contain solar panels to trap energy, just like the Supertrees.
1500m2
Used for storing and purifying the collected water, and converting energy trapped by solar panels
2000m2
Living quarters including living room, dining room, bedroom, kitchen, toilet, entertainment room etc.
500m2
Space for space vehicles and land rovers, and maintenance area; garage
1000m2
Space to store food and purified water
1000m2
Lab for research on Mars
1000m2
Lab for creating food using micro-organisms, connected to kitchen
500m2
Storage room for supplies.
3000m2
Any area can be used to build a solar farm to trap enough solar energy to be converted to generate electricity to supply for the electrical needs of the people living there.
        -
An area outside the domes (not included in the 12500m2) can be used to build a wind farm to convert strong winds on the Martian surface into electricity. (Provided that the wind turbines are built securely to the ground to withstand the occasional sandstorms)

Pg 4


Conditions
Earth
Mars
Difficulty/Advantage
Radius
6378.1 km
3389.5 km
NA
Gravitational Field Strength
10N/kg
3.8N/kg
Lesser Gravitational field strength means objects weigh lesser. Easier to move heavy objects during constructions
Length of day in Earth hours
23.93
24.37
Roughly the same, not much different in short term
length of year in Earth years
1
1.88
NA
Atmospheric(Air composition)
78% nitrogen,21% oxygen, 1% argon and other gases
96% carbon dioxide, 2.1% argon, 1.9% nitrogen and 1% oxygen and other gases
The air at Mars have more CO2 compared to O2, hence oxygen supplying equipment will be needed to respire
Average Distance from Sun
150 million km
227.9 million km
Less sunlight will reach Mars and cooler temperatures will be experienced most of the time.
Average Surface temperature
13 degree celsius
-65 degree celsius
Insulating/cooling equipment and attire is needed to adapt to the cold/warm atmosphere, depending on the season or location of the biosphere on the planet
Availability of water
Oceans, lakes and water bodies
Ice at the planet poles
Equipment to break down and purify the ice to get the water in clean, liquid state is needed.
Life forms present
Large diversity of both unicellular and multicellular life forms
Currently no
It would be difficult to obtain food and oxygen from animals and plants
No.of Moons
1
2
NA
Any other important considerations for sustaining life
Plants can photosynthesize to produce oxygen.
The atmosphere contains a lot of carbon dioxide, so plants can photosynthesize as well
A lot of plant growing can be carried out to produce a supply of oxygen, although a solution to keeping the plants alive is needed

http://en.wikipedia.org/wiki/Climate_of_Mars