Photovoltaic solar modules, inverters and supports. Ground-mounted photovoltaic power generation refers to a solar photovoltaic power plant connected to the public power grid and jointly performing power supply tasks. The three main components are solar PV modules, inverters and racks, which are essential components of the solar PV system. The modules are mainly lines of solar cells. The equipment provides structural support, the inverter is used to convert direct current to alternating current, and the supports can improve the stability of photovoltaic panels.
How to choose a solar water heater
With the continuous improvement of environmental awareness, more and more families begin to use solar water heaters. The solar water heater is a device that uses solar energy to heat water. He is nonot only environmentally friendly and energy efficient, but also inexpensive to use. However, in rainy weather, the performance of solar water heaters will be affected. So we need a solution to solve this problem. At present, electric heating of solar water heater becomes a good choice.
1. The principle of electric heating of solar water heater
The principle of electric heating of solar water heater is very simple, that is, adding an electric heating tube to the water tank 'water. of solar water heater when solar energy is insufficient, it can be heated by electric heating tubes to heat water. In this way, the hot water supply can be guaranteed in rainy weather.
2. Solar water heater electric heating operation steps
1. Buy electric heating tubes
First of all, you need to buy electric heating tubes. IThere are many types of electric heating tubes. Choose the appropriate electric heating tube according to the model and specifications of the solar water heater.
2. Install the electric heating pipe
Install the electric heating pipe into the water tank of the solar water heater. For specific installation methods, please refer to the installation instructions of the electric heating tube or ask a professional to install it.
3. Connect the power supply
Connect the electric heating tube to the power supply. It should be noted that the voltage of the power supply and the rated voltage of the electric heating tube should be the same, otherwise the service life of the electric heating tube will be affected.
4. Use solar water heater for electric heating
In rainy days, you can heat the water in the water tank by turning on the power tor ensure the supply of hot water.
3. Advantages of electric heating with solar water heaters
1. Improve hot water use efficiency
In rainy weather, the solar water use effect radiators will be affected and through the heating of electric heating pipes, the The hot water supply can be guaranteed and the efficiency of hot water use can be improved.
2. Save energy
Solar water heater is an energy saving device, and the use of electric heating tubes is also very environmentally friendly because its energy consumption is relatively low and its use cost is relatively low.
3. Convenient and practical
The electric heating of solar water heaters is very convenient to install and use. You just need to buy an electric heating tube, install it in the water tank. from chsolar water heater and connect it to the Can power supply.
IV. Precautions for electric heating of solar water heaters
1. Choose the appropriate electric heating tube<./p>
When purchasing electric heating tubes, you should choose the appropriate electric heating tube according to the model and specifications of the solar water heater, otherwise the The use effect will be affected.
2. Pay attention to safety when connecting the power supply
When connecting the power supply, pay attention to safety to avoid electric shock accidents.
3. You should pay attention to energy saving when using it
Although the power consumption of electric heating tubes is relatively low, you should still pay attention to energy saving when using it. to avoid wasting energy.
Advantages of energyie solar
How to choose a solar water heater
How to choose a solar water heater Are there several? types of water heaters, including solar water heaters. As we all know, when we buy products, we usually look at the brand first. Famous brands are reliable in terms of quality to a certain extent. The following details how to choose a solar water heater.
How to choose a solar water heater 11. Tips for buying solar water heaters - choose a brand
To choose solar water heater products manufacturers specializing in solar water heater, they are high-quality brands, only in this way can we have excellent product quality and perfect after-sales service system and commitment.
2. Tips for buying solar water heaters - look at the bracket design
The bracket brackete the collector shelf and the insulated water tank. It must have a solid structure, high stability, wind and snow resistance, aging resistance and no rust. The material is usually stainless steel, aluminum alloy, or powder-coated steel.
3. Tips for purchasing solar water heaters - look at the process technology
There is a layer of insulating material between the shell exterior and the interior tank. of the solar water heater tank. Hot water insulation plays a very critical role. The service life of polyurethane insulation materials can reach more than 15 years. The inner tank is where the hot water is stored. It is made of a stainless steel plate with a thickness of approximately 0.5 mm. In short, consumers should choose water tanks with imported polyurethane and thicker insulation layers.
4. Tips for purchasing solar water heaters - Look at the thermal performance indicators
This does not is not that the higher the water temperature in the water tank, it means that the better the thermal performance, the higher the average daily efficiency, the better, and the higher the average heat loss coefficient The lower the better. The second step is to check whether the water heater pressure test is qualified. If the pressure test does not meet the standard, the water heater will easily leak, wasting hot water and making it unusable.
5. Tips for purchasing solar water heaters - choose the water tank capacity
General household bath water: 30 L for men and 40 L for women. water includes cooking Indoors, total water consumption can be estimated based on per capita water consumptiont of 40 L, the water temperature of domestic solar water heaters in winter is;Generally, it is calculated based on 50 to 60 degrees to calculate the water capacity of the water heater. Actual purchase depends on condition of water heater.
6. Tips for purchasing solar water heaters - look at the quality of the vacuum tubes
The vacuum tube is a key part of the water heater. How. the amount of heat the vacuum tube receives under the same external conditions directly affects the water temperature. When purchasing, you should carefully observe the coating on the glass tube inside the vacuum tube. The color is usually black, dark blue or dark gray. Good quality coatings are uniform in color and do not show scratches, peeling or peeling on the glass. there are no stones and the supports are placed correctly and do not come loose.
How to choose a solar water heater 21. Choose high-quality vacuum tubes
Choose high-quality vacuum tubes
The quality of vacuum tubes has a direct impact on the performance of solar water heaters for the whole house. Be sure to choose one that is produced in accordance with national standards, to ensure high vacuum, uniform coating, consistent thickness, high thermal efficiency, low heat loss and long service life. According to the types of vacuum tubes on the market, I recommend choosing waterless vacuum tubes made with patented interference film technology, which have the characteristics of "high temperature resistance, high cold resistance and more efficiency ".
2. Determine the water capacity of the solar water heater
Determine the water capacity of the solar water heater
Determine the water capacity of the solar water heater based on the number ofe people in the house. The size is usually 40 liters of water per person. Generally speaking, the larger the tank capacity of the solar water heater, the better. Since solar energy cannot produce hot water on rainy days, you should choose a water heater with double daily water consumption, which can keep hot water on sunny days and store it for use on rainy days. Dual-use photoelectric models are also available, ensuring hot water availability all year round.
3. Check the materials selected for water heater accessories
Check the materials selected for heater accessories -water
Water tank Outer skin material selection: stainless steel is noble and luxurious, better than other aluminum materials, angle iron, colored steel, etc. ; stainless steelThick ydable is better than thin stainless steel.
Insulating material: Overall polyurethane foam insulation is better than plastic foam board insulation.
Structure: Integral casting is preferable to separate casting.
Water pipes: You can choose copper pipes, stainless steel pipes and PPR pipes instead of galvanized pipes as water pipes. Among them, PPR pipes are cost-effective.
4. Choose a good after-sales service
The after-sales service of domestic solar water heaters is also very important. Choose well-known brands (solar water heaters) and retailers offering good after-sales service. Since domestic solar water heaters are consumer durable goods and are usually installed on the roof of a building, if there is any problem, they are difficult for customers to solve it themselves, it is poWhy after-sales service must be guaranteed.
How to choose a solar water heater 3Look at the product details
The details determine success or failure, and the same details also determine the overall quality of a solar water heater. solar product, such as shock-absorbing foot pads, environmentally friendly inner support, top exhaust port, etc.
Examine the strength level of the production company
When choosing a product, you must first understand the production company production. Only good companies can produce good solar. some products.
Review product quality inspection standards
Without good quality inspection equipment, it is difficult to guarantee high quality standard products. , and large Most companies do not have equipmenttesting ent or their testing equipment is very backlogged. When products are shipped out of the factory, they rely solely on experience and visual inspection. There are many “blind spots” in products and there are also. many quality risks.
Look at after-sales service
After-sales service is an extension of product quality and a guarantee of consumer interests.
Advantages of solar energy
As a new energy source, solar energy has three major characteristics compared to conventional energy sources:
First: it is the most abundant source of energy available to humanity. Clean, pollution-free, environmentally friendly, inexhaustible. It is estimated that over the past 1.1 billion years, the sun has consumed 2% of its energy. In the future, it will be enough to supply humans on earthfor billions of years. It is truly inexhaustible.
Second: There is solar energy everywhere on earth, which can be developed and used locally without transportation problems, especially for greenhouses and solar rooms, solar cookers and ovens. high temperature, seawater desalination devices, water pumps. , Thermal power generation devices and solar medical equipment. Rural areas, islands and isolated areas where transportation is underdeveloped have greater use value. Areas between 50 and 60 degrees north and south latitude, where the annual sunshine duration is 1,600 to 2,400 hours (hours), are generally thought to have abundant solar energy that can be used provided that a certain price is spent initially. A sum of money is invested to make good use of solar energy. After installing the devicel, energy will be delivered to your door continuously, free of charge, and only a small amount of equipment maintenance costs will be spent during this period.
Third: Solar energy is a clean energy source. During development and use, no waste residue, waste water, waste gas or noise will be produced and it will not affect the ecological balance. Absolutely no pollution or public nuisance will be caused.
Fourth: Solar energy does not add thermal load to the Earth. This is a particularly important advantage of solar energy. This is why systems that use solar energy are also called “variable energy systems.” Because when we use solar energy to do work, even though it eventually turns into heat, if we don't use it to do work, it will eventually turn into heat.
Fifth: Social securityrity of solar energy. Nuclear power generation carries a risk of nuclear leakage, once a nuclear leakage occurs, it will cause a huge ecological crisis, but solar energy will never be like that and is very reliable.
Advantages of solar products:
1. Unlimited energy is widely available and energy is provided at the lowest cost. As long as there is sunshine, it can perform photothermal conversion and work all year round.
2. Green and environmentally friendly products. As a clean, renewable energy source, solar energy has unrivaled advantages over other energy sources: no environmental pollution and no safety risks.
3. Long life expectancy. For example, the vacuum tube, the main component of the solar water heater, has a lifespan of around fifteen years. After expiration and replacement, other components may continue tobe used. for another cycle.
4. When used in conjunction with other energy sources, it can operate in all weathers.
5. Significant economic benefits. One-time investment and long-term benefits are the distinctive features of solar products.
Summary - The use of solar energy is imperative
In view of the advantages and disadvantages of the use of solar energy, the development of solar energy remains very desirable. Visual pollution is very subjective, and who can guarantee that a huge collector will not become a spectacular landscape, and the question of cost cannot be short-sighted. Money and space spent can be exchanged over time. Think about it: in a few years, all non-renewable energy will be exhausted. At that time, solar energy will be extremely valuable. As for the problem of poor stability, it is a fact that peno one can change. see God The relationship between man and nature is not like that. The birth and death of all things have their own reasons. This is something humans cannot change. Therefore, the use of solar energy is imperative.
Technical fields of solar energy utilization
Human beings use solar energy in only three major technical fields, namely photothermal conversion, photovoltaic conversion and photochemical conversion. Additionally, there is energy storage technology. .
Photochemical conversion of sunlight includes: photosynthesis, photoelectrochemistry, photosensitive chemistry and photodecomposition reaction. Currently, this technical field is still at the experimental research stage.
Solar photoelectric conversion mainly includes various types of solar panels and power systems.cudgel.
A solar cell is a device that directly converts sunlight into electrical energy.
The photoelectric efficiency of solar cells is about 10-14%, and their product types mainly include monocrystalline silicon, polycrystalline silicon and amorphous silicon. The price of domestic products (referring to the total cost of photovoltaic devices) is about 60-80% yuan/peak watt.
Solar cells have a wide range of applications. For example, artificial satellites, unmanned weather stations, communications stations, television relay stations, solar clocks, electric fences, black lights, navigation beacons and railway signals.
Sunlight thermal conversion technology has the largest number of products. Such as water heaters, water boilers, dryers, heating andcooling, greenhouses and solar rooms, solar cookers and high temperature ovens, seawater desalination devices, water pumps, thermal power generation devices and solar medical equipment.