Chapter 248 Ultra-low temperature evaporation
Time flies.
In a blink of an eye, it was already the end of October when it was cold and frozen.
After nearly a month of debugging, the two special bean silk production workshops have completed the debugging work, and it is now possible to start the production of ordinary silicon bean silk yarn and silicon carbide tube yarn.
At the same time, the other two new workshops are also being renovated in full swing and are expected to be put into use by the end of December this year.
The Minqin Photovoltaic Laboratory, which was just established in October, has also been in place.
Huang Yuguan, the head of the photovoltaic laboratory who jumped from a photovoltaic company, and Xie Ruilin, a researcher who dug up from the Chinese Academy of Sciences, had already obtained the freshly baked silicon carbide tube material.
As soon as they got the materials, they couldn't wait to try them.
The woven fine cloth is very thin because the silicon carbide tube is generally between 124 nanometers and 127 nanometers in diameter. Therefore, the fine cloth woven by this thing is not transparent, but is painted in black color.
After connecting other supporting components of the photovoltaic panel, Topaz looked up and told: "Open the testing equipment."
"Okay, Director Huang."
"Start the simulated light system."
"Yes."
As the simulated light shines on the dark silicon carbide tube fabric. On the other hand, devices such as detecting current, voltage, and resistance also received various data.
Chief researcher Xie Ruilin stared at the data on the instrument, and the ballpoint pen in his hand quickly recorded the feedback data.
Half an hour later.
"Dr. Xie, what's the situation?"
Xie Ruilin looked up slightly: "The effect is a little better than expected, with an average photoelectric conversion efficiency of about 21.7%. "Oh? "Tong Yuguan was a little surprised by this result: "If this data, you can consider producing directly."
"It's okay to produce directly, Director Huang, do you know how much the cost of this thing is?"< br>
Topaz has worked in a photovoltaic company for five or six years and is very clear about the situation. He smiled and said, "The cost of this kind of silicon carbide tube is very low, at least our internal procurement will be very cheap."
"Specific How much? How much does it cost per square meter? "
"The factory calculates the cost by ton, and the production cost per ton is about 80,000 yuan."
Xie Ruilin lifted his glasses and looked at him Very shocked: "80,000 per ton?" Then he picked up a document on the desktop and searched through the parameters: "About 246 grams per square meter... A ton is about 4,065 square meters, and a square meter is only 19.68 yuan? Damn! "
"If this thing goes on sale, traditional photovoltaic panel manufacturers will probably collapse completely." Huang Yuguan joked.
Xie Ruilin didn't worry about such market affairs. After all, when he was working at the Chinese Academy of Sciences, he didn't participate in the actual industry confrontation. He touched the stubble on his chin and said, "Director Huang, I heard that the airship company is planning to do it. Install this thing on the upper half of the airship? "
"Yes! With this performance, it is estimated that 100,000 square meters of photovoltaic power generation area is not required. After all, with such a huge area, there is too much power generation. If you can't use so much power, the airship can only choose to abandon the power or add the battery."
Whiteshang Yuguan answered, he took out a confidential version of the customized tablet and found part of the design of the Airship Company Information:
"The largest Blue Whale 3 airship currently has a maximum power consumption of 1150 kWh per hour, and a maximum power consumption of 24 hours is only 27,600 kWh, even if other lifting and compressed hydrogen are added , refrigeration and other electricity consumption will not exceed 40,000 kWh a day. "
"If this is the case, there are indeed too many photovoltaic panels of 100,000 square meters of silicon carbide tubes." Xie Ruilin picked up The ballpoint pen calculated: "Thinking about it just as a supplement, I think 20,000 square meters is enough."
Regarding this data, Topaz also agreed: "20,000 square meters, ideally, the average power generation per day is 34,700 kilowatt-hours, which can basically meet about 86% of the power demand per day. This can also reduce the scale of battery configuration, probably only requires Just configure about half of the battery before."
Xie Ruilin smiled and shook his head: "Forget it, let's leave this kind of thing to the airship company to consider! Let's study how to improve the technology!" "Yes."
Everyone discussed how to improve the technology.
After discussing for several hours, they came up with several improvement directions, such as thickened fabrics, doped gallium arsenide, and the use of special braided structures.
At the same time, two groups are conducting various tests of silicon carbide tube photovoltaic panels.
This includes service life assessment, service life attenuation rate, high ultraviolet environment, strong wind and sand environment, high salinity environment, high temperature environment, low temperature environment, vacuum radiation environment and other service life assessment.
It's at this moment.
The dome structure of the airship dock has also begun to enter the installation stage.
The first stage is to install the skeleton.
The integrated ultra-light arch bridge structure is easily lifted by a crane.
"Slow down..." The construction party's safety officer stared at it.
Suddenly, a strong northwest wind stormed with sand, and the very light arch bridge-shaped skeleton was constantly shaking by the wind.
The worker who is pulling the guide quickly fixes the traction rope to the counterweight prepared in advance to prevent the skeleton from being blown and shaken.
After a while. I saw the wind stop.
The construction commander quickly picked up the walkie-talkie: "Hurry up, move."
As the hollow mortise and tenon structure at the bottom of the skeleton, it is slowly inserted into the high-strength steel column reserved on the foundation. Several workers kept lifting the huge nuts and mounting them on screws thick on their arms.
After the installation was completed, another group of workers pulled the high-pressure air gun to blow the dust on the surface of the nut screws and steel columns, then quickly sprayed it with quick-drying protective paint, and then put a layer of engineering plastic protective sleeve. .
This dock is the smallest, with a length of 300 meters, a width of 100 meters and a height of 100 meters.
Standing on the ground, the front is a hemispherical shape, and from the side it looks like a cylinder buried half of the ground.
As a result of the modification of the design plan, there were no photovoltaic panels on the surface before. Now, new photovoltaic panels must be installed on the domes of these docks to enhance the energy self-sufficiency of the base.
Just when the airship factory was in full swing.
The 511 Laboratory of Minqin R&D Center, which is responsible for the research on the application of new materials, also discovered a very valuable application at this time.
This laboratory mainly studies the deep application of silicon carbide tubes.
Its chief researcher Zhang Shuli looked at the experimental equipment in front of him and his face became excited involuntarily.
No mistakes, one poem, one post, one content, one in 6, one book, one bar, one read!
I saw that as the equipment's negative pressure system started, a steady stream of pure water was pumped up from the sewage tank at the bottom.
In less than twenty minutes, one cubic meter of sewage was pumped about 90%.
Zhang Shuli picked up the sampler, took 20 samples, and sent them to the testing laboratory of the R&D center, allowing them to conduct a comprehensive ingredient testing.
While waiting for the test report, they experimented more than a dozen times one after another, using local urban sewage, salt water from nearby salt lakes, and chemically contaminated water prepared by the laboratory themselves, and then pumped water experiments.
After getting the test report. "Dr. Zhang, good news, good news..." 6 One researcher's face was full of joy. "The result is out?" Zhang Shuli suddenly bounced out of his seat.
The researcher gasped: "Huhuhu... it came out, and it turned out to be ultrapure water."
"Okay, okay..." Zhang Shuli took the test report. He looked at it very carefully, and his body was even shaking slightly because he was too excited. "Dr. Zhang, we succeeded." "The low-cost seawater desalination technology did not expect it to be implemented like this." More than a dozen researchers were ecstatic.
The water pumping technology they studied was to use a silicon carbide tube with an inner pore diameter of 46 nanometers to 49 nanometers. During the sintering process, aluminum powder and calcium powder were added to the graphite powder to form a special inner wall. structure.
This new silicon carbide nanotube only requires an air pressure difference on both sides of the pipeline, and the water molecules on the high-pressure side will automatically flow to the low-pressure side.
To be precise, water molecules on the high-pressure side will "evaporate". This evaporation principle is ultra-low temperature evaporation caused by the vacuum state inside this type of silicon carbide nanotube.
So these very small pressure differences can quickly evaporate water on the high-pressure side, and then water vapor molecules will be continuously sucked over the low-pressure side.
In this case, you only need to maintain the low air pressure on one side to continuously obtain ultra-pure water.
It turned out that Zhang Shuli and others used the mode of laying the water flat, but did not successfully obtain ultra-pure water, but instead made the nanotubes blocked by impurities.
Until two days ago, they accidentally placed the silicon carbide nanotubes vertically above the water body, and it opened the door to the new world in an instant.
This placement method allows water molecules to pass through the nanotubes in the form of water vapor, while other components cannot move upward due to gravity, which ensures that the inside of the pipeline will not be easily blocked and can be long-term Run it.
This is also the prerequisite for achieving ultra-low cost seawater purification.
Otherwise, it is a considerable cost to replace silicon carbide nanotubes often.
Add with this small pressure difference pumping, there is almost no need for a heat source to heat seawater, which further reduces its cost.
After Zhang Shuli was excited, he quickly calmed down. He ordered: "Everyone should organize the report as soon as possible. I will report this to the boss tonight. At that time, the boss will not forget everyone's hard work."
"Yes .”
“Don’t worry! We will definitely not lose the chain at such a critical moment.”
Zhang Shuli immediately arranged all the work and asked everyone in the laboratory to work overtime. You must carefully fix the experimental data.
After all, this technology is very important.
Their laboratory itself predicted that just the small equipment in the laboratory can extract 65 cubic meters of ultra-pure water a day, and its energy consumption is less than 3 kWh of electricity.
In addition to equipment depreciation and site costs, as well as other miscellaneous expenses, the cost per cubic meter of ultra-purified water will not exceed RMB 0.05.
This cost can instantly kill all current seawater purification technologies.
(This chapter ends)