Function of solar cell: convert light energy into electrical energy
Purpose of solar cell: convert clean solar energy into electrical energy that can be transported and stored to provide power for the operation of the equipment. Can be used in satellites, Mars probes, solar cars, solar planes, solar ships, solar street lights, solar power stations, etc. !
Why do solar cells have thin grid lines?
There are many materials for heaters. The initial choice determines the actual use effect and subsequent practicality to a certain extent. Since the service life is long, what I recommend to you today is a relatively advanced superconducting solar heater. So, what are the benefits of superconducting solar heaters? What is a superconducting radiator? What do you owebe careful during the purchasing process? Consumer friends who have similar confusion can consider it based on the following. Knowledge of these aspects also lets us know that superconducting solar heaters are green, environmentally friendly, non-toxic and pollution-free, and the thermal effect is relatively good. You can make a bold choice with confidence.
1. Main advantages of superconducting solar heaters
Energy saving: Energy saving of more than 50%. The thermal efficiency of radiators using superconducting heat transfer fluids is more than 30% higher than that of water heating, which significantly reduces heating fuel consumption and reduces heating costs and expenses. In addition, there is no possibility of water leakage and the direct inlet and outlet method of the heat exchange tube bodysignificantly reduces the circulation consumption of the heating system. It does not use water as a heat transfer medium, but uses composite chemical superconducting circulation to conduct heat. The superconducting liquid has a vaporization potential 1.5 times greater than that of water. It vaporizes when heated to produce high-energy physical changes, causing the heater to heat up quickly within minutes.
The heat transfer rate is several times that of water heaters, and it usually takes 1-2 hours for water heaters to reach room temperature. It can truly heat up when it burns, saving heating costs while ensuring rapid heating when needed. The vacuum superconducting radiator does not use water as a heat transfer fluid. The main body of the vacuum superconducting radiator is a cavity underempty. The heat transfer fluid only circulates through the rust-proof composite tube at the bottom. one tenth of that of an ordinary radiator.
Good quality: The heat transfer temperature is more than twice that of water heating. The thermal efficiency of the superconductor is more than 30% higher than that of heating water. It can increase the radiator surface temperature by more than 90 degrees in 5-8 minutes. The vacuum cavity of the superconducting radiator is filled with a special superconducting liquid with rapid heating, antifreeze and high efficiency heat transfer. There is no possibility of oxidation and corrosion. The bottom of the radiator is made of rust-proof thermal support. composite tubes. The lifespan can be the same as that of the heat pipe.
Coupled with the special manufacturing process and principle of vacuum phase change radiator, the phenomena of leakage, leakage, scale andThe corrosion that has always existed in conventional radiators and other steel radiators has been basically eliminated. Plumbing equipment only lasts six to seven years, but once a superconducting heating system is installed once, it will not need lifetime maintenance as long as there is no damage caused by man, and its lifespan can reach 50 years.
Antifreeze effect: The inner vacuum cavity of the radiator is filled with a special high-efficiency CY-N5 rapid heating antifreeze heat transfer composite superconducting liquid. It will not freeze in a low temperature environment of minus 40 degrees, completely eliminating the. cold supply from the north. The hidden danger of frost cracks of water pipe radiators caused by thermal interruption. The superconducting medium used has an extremely low starting temperature and only needs 30 degrees to stimulate temperature transfer.nature. The water used in the plumbing system must reach 60 degrees or higher before it can transfer heat.
2. What is a superconducting radiator
Superconducting radiators are different from radiators in the traditional sense. Instead of water, a superconducting material is injected into the chip. The chip is in a vacuum state, which has a low start-up temperature and rapid conduction (put the superconducting radiator in hot water and it will heat up in just a few seconds). high temperature (with a heated superconducting radiator, the entire surface can reach temperatures above 80°C), water saving of more than 80% (the entire superconducting radiator has no water, just need to filling the boiler and water pipes), with the advantages of easy installation, saving time and materials, corrosion resistance, long service life, safetyty and reliability, energy saving and environmental protection. Inject a small amount of superconducting liquid into the internal cavity of the radiator. When hot water passes through the connection tube at the bottom of the superconducting radiator, the superconducting liquid in the superconducting radiator is activated, and the activated high temperature gas vaporizes. outwards through the surface of the radiator. Radiation heat dissipation achieves the heating purpose.
The above recommendations cover the benefits and precautions of superconducting solar heaters. From here we can know that they are different from traditional superconducting solar heaters which use advanced working principle and materials. We also use new green and environmentally friendly materials. In addition, the radiator is more efficient in terms of heating. For the clothesNortherners who have cold winters, I think choosing the right heater can help them to some extent. it improves the comfort of life, you can use it as a standard reference to understand below.
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Due from the screen the reason for printing.
After the solar cell has undergone processes such as texturing, diffusion and PECVD, it has been transformed into a PN junction, which can generate current under light. In order to conduct the generated current, this is necessary. to make positive and negative junctions on the surface of the battery electrodeie. There are many ways to manufacture electrodes, and screen printing is currently the most common production process for manufacturing solar cell electrodes.
For solar cells, in order to obtain the highest possible photoelectric conversion efficiency, the cell structure must be designed in detail. The metal grid is responsible for guiding the photocurrent inside the battery to the outside of the battery. Optimal solar cell array design is to minimize the total battery power loss.based on.
A well-designed grid structure will minimize the series resistance of the battery, thereby minimizing power loss and maximizing power output. This is especially important for single solar cells with large area power output.
Reducing the width of fine grid lines during the process can reduce therequired optimal spacing of fine grid lines, which can significantly reduce the total relative power loss of the upper layer side current and the relative power of fine lines. shading losses of the grid line, thereby reducing the total power loss caused by the electrode. In order to increase the resistance of the sheet and reduce the power loss caused by the electrode, it is necessary to increase the number of fine grid lines and reduce the width of the fine grid lines.
Detailed Information
Screen printing uses printing to print predetermined graphics onto the substrate. The gear is printed with silver foil paste on the back of the battery. , consisting of three parts: aluminum paste printing on the back of the battery and silver paste printing on the front of the battery. Its operating principle is as follows:
Use the msifting the sieve pattern to penetrate the slurry, apply some pressure to the slurry sieve part with a scraper and move to the other end of the sieve at the end. at the same time. The ink is expelled by the scraper from the mesh of the graphic part onto the substrate during movement. Due to the viscosity of the paste, the impression is fixed within a certain range. When printing, the scraper is always in linear contact with the screen printing plate and the substrate. The contact line moves with the movement of the scraper, completing the movement. printing stroke.
Baidu Encyclopedia-Solar Cells