MTL - The Science Fiction World of Xueba-Chapter 39 Endangered

"Pang, building mathematical models requires accurate data support. We breathe carbon dioxide every day. After the potatoes are removed from the planting tank, the amount of carbon dioxide absorbed by photosynthesis after the breath is eliminated every day. The difference between them is how many green leaves need to be planted to maintain the habitat. We have to measure the internal carbon dioxide balance accurately. "

"In addition, planting new green leafy plants requires water and fertilizer. If we have water, we still have 500 liters in our water circulation system. In addition to our basic drinking and washing guarantee, we can take 300 liters from it. The hydrazine in MDV also returns There are 100 liters left, which can make 200 liters of water. Forty liters of soil per cubic meter, so that we can also make about 12.5 cubic meters of soil. The biggest trouble is fertilizer, the plant seeds we have now, Basically, vegetables are the mainstay, and there is no way to provide us with a lot of calories. Therefore, once new green leafy plants are planted, the output of potatoes will definitely decline, and food shortages will be caused by then ... "

Pang Xuelin nodded: "Wotney, I was thinking, maybe we could consider moving to a roamer. We also have 2300 hours of small carbon dioxide filters. We work in the habitat for twelve hours a day and twelve hours left. Take a break in the rover. This will prolong the use of the back-up carbon dioxide filter in the perch, on the other hand, it will also be convenient for our experiments. There is an atmospheric analyzer in the rover, and we can adjust our plan according to the changes in the carbon dioxide content! "

Watney lowered his head and groaned for a moment, and said, "This method is good!"

Then they moved into the rover that night.

In the daytime, it enters the perch and starts the water-making work on light roads.

It took only three days to convert one hundred liters of hydrazine into 200 liters of water. To this end, they also consumed nearly one hundred liters of reserve liquid oxygen.

But they originally planned to work 12 hours a day, and in the evening of the first day, they could not go on.

Because of the carbon dioxide concentration in the habitat, it exceeded 2000 ppm in twelve hours, which had a significant impact on Pang Xuelin and Watney.

The two had to activate the reserve carbon dioxide filter of the berth to absorb the carbon dioxide in the berth.

It wasn't until two hours later that the carbon dioxide in the habitat was reduced to a safe concentration, and they turned off the carbon dioxide filter again.

After three days of testing, Pang Xuelin and Watney found that the potatoes grown in the habitats can only absorb two people breathing for ten hours a day to produce carbon dioxide, and the rest must be solved by carbon dioxide filters.

Because they are basically working in high intensity in the habitat, the carbon dioxide produced in 12 hours is equivalent to two-thirds of the carbon dioxide content exhaled by two people a day.

"This is good news. Even if we do nothing next, the use of potatoes in the planting cabin can extend the working time of the carbon dioxide absorber in our habitat to 30 days. If we choose another suitable crop, maybe It really keeps the basic balance of the carbon dioxide that we breathe, and even if it is slightly exceeded, it can greatly extend our working time on Mars. "

Watney nodded: "I have selected the plant we are going to plant next, and grow tomatoes! The dozen crops we carried this time, although there are also C4 crops such as rice and corn with higher photosynthesis efficiency, However, these plants have a harvest period, and they have high requirements on moisture and fertilizers, which are not suitable for us to grow. Tomatoes are more suitable. Tomatoes are herbaceous plants. Possess strong carbon dioxide absorption capacity. Moreover, tomatoes and potatoes are not the same. As long as they have the right temperature and humidity, they can grow all year round. In this way, 24 hours of uninterrupted photosynthesis can be basically guaranteed. Unfortunately, we did not carry this Single-cell algae, then the efficiency of photosynthesis per unit volume of the gadget is high. As long as it is well managed and arranged in the planting cabin, it is enough for us to use! "

Pang Xuelin laughed: "You are an expert, listen to you!"

Next, after consulting the expert group on the earth, Pang Xuelin and Watney kept their rest time at twelve hours and rested in the rover and worked in the twelve-hour habitat.

In order to ensure communication, Pang Xuelin also connected the rover's communication equipment to the Mars Pathfinder Landing Module. In this way, not only can it contact the earth in the habitat, but also in the rover.

The twelve hours of rest time, the carbon dioxide exhaled by the two people is equivalent to only one-third of a day's breathing. The twelve hours of working in the berth, and the two-hour carbon dioxide absorber in the berth can be opened to maintain the carbon balance of the berth. .

In this way, the carbon dioxide absorber that can only be used in the berth for 20 days can be extended to 240 Mars days.

The 2300 hours of small carbon dioxide absorbers can also be extended to 145 Martian days.

When the small carbon dioxide absorber runs out, they enter the habitat and use the oxygenator back-up carbon dioxide absorber for a maximum of four to five days.

150 Mars days ~ www.novelbuddy.com ~ This is the limit under the current state of tomato planting. As for tomato planting, how long the survival time can be extended, Watney has no way to determine.

The situation is really bad.

But Pang Xuelin and Watney still adjusted their mentality as much as possible and devoted themselves to tomato planting.

After spending half a month, the two converted the original living cabin into a tomato planting cabin, with a total of 50 square meters of soil. Pang Xuelin and Watney specially transplanted half of the matured soil in the potato planting cabin into the tomato planting cabin, and The newly created soil is re-buried in the potato planting cabin.

This is likely to have a very bad impact on the yield of the second season potato, but in order to ensure the survival rate of the tomato, the two can't care so much.

Uh ...

201 201st Mars.

[19:20] JPL: Xue Lin, my name is Tian Mu. Your latest data has been received. A simulation cabin has been created on the earth that is basically consistent with your environment on Mars. According to the photosynthesis of tomato provided by you and the laboratory Using relevant data and performing simulation calculations on a supercomputer, the results show that 50 square meters of tomatoes, when matured, together with potatoes, can absorb five-sixths of the carbon dioxide you produce, and the remaining one-sixth must pass through your Carbon dioxide absorber is solved. Excluding the decline in carbon dioxide processing capacity caused by the potato harvest season, a preliminary estimate is that you still have 400 Martian days to survive. My colleagues are working overtime and will launch supplies next month, which contain a lot of food and used to The spare molecular sieve for repairing the oxygenator is initially expected to arrive before the 585th Mars!

19 【19:42】 Roamer: I received it. I hope the calculation result with the super calculation is correct. Thank you for your efforts. I wish the supply plan all the best.