To solve the problem of electricity consumption, either the biomass produced by Chen Xin's oxygen generator is used to generate biogas power enough to meet its own consumption, or Chen Xin will continue to upgrade the power system of the current shelter, hoping to upgrade it to a more self-sustaining power system, such as a nuclear reactor that can operate for decades.

The first option is naturally not possible because energy is conserved.

If the biomass produced by the oxygen generator is used for biogas power generation to meet the system's own consumption, wouldn't it mean that this is a perpetual motion machine?

Therefore, the solution to the problem is to continue to upgrade the system, and to upgrade to energy saving and upgrading.

It's just that Chen Xin has checked his own generator and power system, and there are only two upgrade options in the system: improving the efficiency of the generator and improving the energy saving rate of the entire power system, and it is not possible to upgrade it to other types of generators for the time being.

However, this is not absolute, Chen Xin thought that when he upgraded his protective clothing before, he provided a tactical poncho to make the protective clothing have more functions and tactical camouflage on the surface, and he felt that if he could provide other power generation methods, it could also be integrated into the power system.

"If I integrate biogas power generation into the power system, with gasoline generators as the main power and biogas power generation as the auxiliary, and the two methods supply power at the same time...... Chen Xin thought that other power generation methods could be integrated into the power system, Chen Xin hurriedly took out a pen and paper to calculate. 、

"The current consumption of the greenhouse needs to be maintained by the generator consuming 20 litres of gasoline per day, and that consumption remains the same......"

"The greenhouse can meet my oxygen consumption when there is light, and there is still a surplus of output...... But considering the spillage of the ventilation system, and the oxygen consumption after the lights are turned off......"

"With the same light time of 12 hours, the oxygen produced by the greenhouse can sustain my consumption for 16 hours, without considering the presence of external oxygen......"

"Increasing the amount of oxygen produced by increasing the amount of light I need for 24 hours, but adding at least five hours of light a day would increase gas consumption from 20 litres per day to 30 litres per day......

"If we build an algae recirculating oxygen generator, the electricity consumption is less than that of maintaining a long-term sunlight in the greenhouse, and the electricity supplement brought by biogas power generation only needs to increase the consumption of gasoline by another 5 liters per day......

Listing the various data for calculation, Chen Xin easily calculated the result.

Looking at the results he calculated, Chen Xin touched his chin, obviously building an algae circulation oxygen concentrator like the one he told Mo Qingyan was the plan with the least consumption at present.

And when Chen Xin built such an oxygen generator, he could upgrade the oxygen generator through the system to improve its oxygen production efficiency, biomass output, and biogas reaction efficiency...... It is even possible to convert biogas power generation into biomass fuel cells, or to convert the produced biomass into edible algae.

Thinking of this, Chen Xin was sincerely glad that he had picked up this system when he entered the shelter, instead of turning a blind eye to it as an ordinary meteorite.

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Since he decided to build an oxygen concentrator, Chen Xin obviously had to take stock of the resources in his hands first.

After all, it's not like upgrading an existing item, he can directly upgrade it with the help of the system's survival points.

This is also the biggest weakness of this system, it cannot make something out of thin air, it can only be upgraded according to what is already there.

No matter how simple and primitive the items used as the basis for upgrades are, as long as there is a material basis, the system can continuously improve them.

But without this foundation, then nothing is necessary.

So even if Chen Xin uses a wooden board to build a sink to let algae grow in the water, and then insists that this is an oxygen concentrator, he must build this sink first.

Fortunately, Chen Xinxing's materials are not lacking, and he doesn't have to build a sink with wooden planks that is really primitive.

To build an algae circulation oxygen generator, the first thing to have is not a tank, but a foundation for algae to grow on, that is, a biological façade.

This is not complicated, if you are not so particular, the screen window used at home can also be improvised.

Let the algae cling to it, then provide water, carbon dioxide, and light, and soon the algae will start to grow and multiply, and photosynthesize to release oxygen.

As for the sink, this is not necessary, because it is perfectly possible to get a hose to hang on to the algae's attachment and keep the algae moist through the hose without having to soak it in the water completely.

If the conditions are a little better, it can provide a better algae attachment base.

The Germans' technology is to make hollow glass plates, connect supply and discharge lines to these hollow glass plates, and then inject a medium into the hollow glass panes to grow algae.

At the lower end of a single insulating glass plate, carbon dioxide is injected into the medium as a nutrient through a supply line to produce bubbles, and the vortex formed during the rise of the bubbles stimulates the algae in the medium to absorb carbon dioxide and light, photosynthesize, and grow and reproduce.

When the algae grow and multiply to a certain extent, the algae in these insulating glass panes are recycled and the biomass is harvested.

According to the experimental data given by the Germans at that time, such a square meter of insulating glass plate can produce 900 kilograms of biomass a year, which can produce about 10 liters of methane per day, and a 200-square-meter insulating glass plate can produce more than 600 cubic meters of methane a year.

This methane can be used to generate 4,500 kW/h of electricity and 6,000 kW/h of heat, which can be said to be quite clean and efficient.

Of course, the Germans use fuel cells, rather than simply burning methane to release heat to generate electricity, which is much more efficient.

With the materials Chen Xin currently has at hand, he can only use screen windows or other things that are easy to attach to as a foundation for attachment, and then pour water and provide light on them to make algae grow.

To put it simply, it means building a simple device and getting it up and running, and then considering upgrading it to improve operational efficiency and expand production capacity.

All you need to make a simple device is a sink, a miniature vacuum pump, a few PVC pipes, and an attachment façade.

Chen Xin rummaged through his storage room and quickly figured out what to use, though they might not be so good and needed some remodeling.

The size difference is a lot, resulting in the pipe and the vacuum pump cannot be connected, the sink is simply a plastic box, and the attached façade is also a screen removed from the window of the container house......

Looking at these things, Chen Xin felt that he might need to make a workbench for himself first.