Chapter 100: Microalgae to ethanol

　　The sudden drop in temperature made the two problems of warmth and heating of the shelter become serious at this time.
　　Although the outside temperature is -34℃ and the interior of the shelter is 7℃, it is enough to prove that the shelter has excellent warmth and cold resistance, but this does not conceal the fact that the temperature inside the shelter is already very low.
　　Be aware that there are also greenhouses in the refuge. If the temperature there is too low, it will affect the growth of crops.
　　 While thinking about these issues, while clearing the ice in the small bunker, Chen Xin had to think about how to improve the heating and keeping warm of the shelter.
Compared with the heating problem, keeping warm is not so difficult for Chen Xin. After all, his refuge is protected by a soil layer more than two hundred meters away. Even the entrance has a thick reinforced concrete and insulation layer, which has absolutely no thermal insulation performance. In other words, the indoor temperature is still 7 degrees is the best proof.
　　 If you want to improve the insulation performance, Chen Xin thinks that he only needs to upgrade the wall insulation material again, it should be enough.
　　 As for the choice of upgrading insulation materials, Chen Xin has no idea, but if possible he wants to replace the wall insulation materials with carbon-doped aerogel.
　　The thermal conductivity of carbon-doped aerogel can be as low as 0.013w/m·K at normal temperature and pressure, which is currently the lowest thermal conductivity solid material on Bluestar.
　　 Compared with the traditional polyurethane material, the performance is more excellent, even in the extremely low temperature environment, it can still play a good thermal insulation effect.
　　 But the heating problem is a bit serious.
　　 Although the room temperature inside the refuge is still 7 degrees Celsius, it is fine if Chen Xin does not turn on the heater at this temperature, but the planting greenhouse cannot.
　　Although low temperature will not cause crop death, it will reduce crop activity and slow down the growth rate. A crop that can be harvested in one month may take 40 days to harvest.
　　 Therefore, Chen Xin must find a way to maintain the temperature of the planting greenhouse at at least 20°C to ensure good crop growth.
　　 This undoubtedly needs a powerful heating system, whether it is electricity or gasoline, it will consume a lot of money.
　　 After all, the calorific value of gasoline is placed here, and the energy that can be generated is fixed, and the conversion of heat energy into electric energy has its own loss, and electric energy has to be converted into heat energy. The energy loss in the middle is too high, and the gain is not worth the loss.
　　After all, Chen Xin found that he was still stuck by the energy problem. If this problem is not solved, it will be difficult for the shelter to continue to operate normally.
　　 After knocking the broken ice in the small bunker and throwing the broken ice on the ground from the gap, Chen Xin took the tool and hammered back to the refuge.
　　 Taking off his protective clothing, he came to the planting greenhouse with a temperature measuring gun, intending to measure the temperature of the greenhouse, and then think about heating.
　　 However, this measurement is somewhat unexpected, and the temperature in the planting greenhouse is still 11°C.
　　 Chen Xin looked at the planting greenhouse with a little surprise, and carefully looked at the walls of the planting greenhouse and the fill light hanging on the shelf, and he understood.
These supplementary lights are used to simulate the sunlight. The intensity can be equivalent to natural light, and naturally there will be heat generation. Coupled with the insulation of the walls of the planting greenhouse, it is not difficult to understand that the temperature is higher than other places in the refuge. thing.
　　 But even so, Chen Xin still has to consider warming up the planting greenhouse.
　　 Although the temperature of 11°C is not low, it still affects crop growth.
　　 put the temperature measuring gun back into the cabinet in the bedroom, Chen Xin turned on the computer, and while eating self-heating food for breakfast, he planned to check information.
　　 After checking the information, Chen Xin is also thinking about what kind of heating method is more suitable for him.
　　Chen Xin’s refuge is located on the banks of Dongting Lake. As the north gate of Hunan Province, this city has a large number of hot springs, whether it is to the south or north, but it is a pity that the city does not have any geothermal resources or hot springs.
　　 If there are geothermal hot springs, Chen Xin feels that he can completely give up thinking. It is enough to dig a large hot spring bath in the refuge and directly use geothermal heat for heating. Even if the geothermal heat is abundant, he can also use it to generate electricity.
However, Chen Xin no longer counts on the natural resources of geothermal hot springs. Not to mention that the city itself does not have geothermal hot spring resources. When Chen Xin upgraded the water supply system, he fell 50 meters down, and the groundwater that came up was not only bad. It's hot, even a bit cold.
　　 So geothermal hot spring Chen Xin is not expected anymore.
　　 While browsing the information, Chen Xin also noticed a piece of information that interests him.
　　 Although this information has nothing to do with heating, it still attracted his attention.
　　 This is a technology developed by an algae biofuel company in the Federal State of Florida. It uses a blue-green microalgae intracellular photosynthetic process to produce ethanol.
The ethanol produced by blue-green microalgae can be excreted through the cell wall, collected as a dilute ethanol/water solution from a closed photobioreactor, and purified into fuel grade ethanol.
　　 This is a new technology that was still in the experimental stage before the disaster ~EbookFREE.me~ But the prospects are indeed promising, and the technology itself has been proven to be feasible.
　　According to the data given by this company, they expect to build 430 bioreactors per hectare, which can produce about 56,000 liters of ethanol per hectare per year. The average calculation is that one bioreactor produces about 130 liters of ethanol.
And a photobioreactor has about 4,500 liters of culture medium, which is 4.5 cubic meters by volume. Chen Xin feels that he can consider upgrading his algae oxygen generator to this mode, producing oxygen while producing ethanol. Come.
　　 You must know that ethanol is a very good fuel. Although 130 liters is not a lot, it can be used in many ways.
　　 recorded this information, Chen Xin searched for a while, only then found the information he was looking for, the shallow geothermal energy utilization project planned by the city in the "13th Five-Year Plan" of Yan Country.
　　 The so-called shallow geothermal energy refers to the geothermal resources contained in the depth of 0-200M on the surface, and is an energy concept relative to geothermal resources.
　　 Although it belongs to geothermal energy like geothermal resources, the definition of shallow geothermal energy is <25℃ shallow low temperature geothermal energy, and its main utilization method was used for heating before the disaster.
Although the technology for the use of shallow geothermal energy is not a new technology, because the city’s three shallow geothermal energy utilization projects were planned in recent years, these projects were not completely completed until the disaster. Not to mention put into use.
　　 Looking at the introduction and related materials on geothermal energy, Chen Xin couldn't help but be moved. Would you like to do this? If it is done, it can not only solve the current heating problem, but if it continues to upgrade in the future, it may also develop deeper geothermal resources.