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BTE OEM Solar Thermal Collectors: Reliable Hot Water Solutions for Global Partners
OEM Solar Thermal Collectors: Reliable Hot Water Solutions for Global Partners
As innovative pioneers, the machines that we need for the production of our high-quality and market-conform solar products are not easily available “off the shelf”.
Therefore, we constantly further develop our highly advanced machines with an “everything is possible” attitude, in order to enforce the diverse technical requirements. Aesthetic design and numerous environmental and innovation awards distinguish our collector families. Each individual collector range has numerous customer-specific designs. Hence, we are able to offer several hundred different types of collector variants and countless mounting solutions.
Advantages of flat-plate solar collectors:
1. The high quality and intelligent product design ensures unbeatable value for money
2. The robot-controlled production line ensures the highest levels of precision during the production process
3. Automatic production data acquisition and thereby traceability of each products’ raw material, producing date, producing worker, and delivery time easily and quickly;
4. Three times quality check by 100% full-automatic pressure test in a closed cabin;
5. The resistance and longevity of the welding seam with around 10048 welding spots per absorber is proven through accelerated ageing tests!
Specification And Data
Model No. & Specs | BTE2.0-2 | BTE2.5-2 | |
Overall Data | Collector dimension(mm) | 2000x1000x80 | 2000x1250x80 |
Overall area (㎡) | 2.0 | 2.5 | |
Aperture area (㎡) | 1.88 | 2.37 | |
Absorber | Header dimension(mm) | 22mmx0.6mm | 22mmx0.6mm |
Welding way | Laser welding | Laser welding | |
Selective Coating Film | Selective Coating Film | ||
Riser Dimensions | 10mmx0.5mm | 10mmx0.5mm | |
Max. working pressure | 1.5Mpa | 1.5Mpa | |
Absorber material | 0.4mm Aluminum plate + copper pipes | 0.4mm Aluminum plate + copper pipes | |
Absorption | 95%(±2%@AM1.5) | 95%(±2%@AM1.5) | |
Emittance | 5%(±2%@80℃) | 5%(±2%@80℃) | |
Stagnation Temperature | 213℃ | 213℃ | |
Operating Pressure | 0.6Mpa | 0.6Mpa | |
Testing Pressure | 0.9Mpa | 0.9Mpa | |
Insulation | Insulation material | Fiber glass + polyester fiber | Fiber glass + polyester fiber |
Insulation thickness(mm) | Back: 30mm; Side: 20mm | Back: 50mm; Side: 17mm | |
Glazing | Transmittance | 91.5% | 91.5% |
Material | 3.2mm Low iron tempered textured glass | 3.2mm Low iron tempered textured glass | |
Casing | Frame | Aluminum 6063-T5 | Aluminum 6063-T5 |
Back plate | Color Galvanized Plate, thickness:0.5mm | Color Galvanized Plate, thickness:0.5mm | |
Frame color | Silver/Black | Silver/Black | |
Sealing gasket | Integral Silicone glue | Integral Silicone glue | |
Conversion Factor η0 | 0.778 | 0.778 | 0.778 |
Heat Transfer Coefficientα1 | 3.852W/(m2K) | 3.852W/(m2K) | 3.852W/(m2K) |
Temperature Dependent heat transfer Coefficientα2 | 0.008W/(m2K2) | 0.008W/(m2K2) | 0.008W/(m2K2) |
Overall weight | Net weight(kg) | 35 | 43 |
Load qty | 40 feet container | 350 PCS | 280 PCS |
FAQs about Solar Thermal Collectors
1. Are solar thermal collectors and photovoltaic (PV) panels the same thing?
Not exactly. This is a common confusion.
Solar photovoltaic (PV) panels: Utilize the photovoltaic effect to convert sunlight directly into electricity, which can be used to power appliances.
Solar thermal collectors: Utilize the photothermal effect to convert sunlight into heat, which can be used to heat water or air, providing hot water, heating, or industrial heat.
In short: PV panels generate electricity, while collectors generate heat. There is also a photovoltaic-thermal (PVT) system that can generate both electricity and heat.
2. What are the main types of solar thermal collectors?
Flat-plate solar thermal collectors: These collectors are the most widely used, featuring a robust structure, easy integration into buildings, and a long service life.
Evacuated tube solar thermal collectors: Evacuated tube solar thermal collectors utilize vacuum insulation technology for excellent thermal insulation and higher efficiency in cold environments and during winter.
Concentrating solar collectors: Concentrating solar collectors use reflectors to focus sunlight, generating extremely high temperatures. They are primarily used in large-scale solar thermal power plants.
3. Can a solar water heating system operate on cloudy days or in winter?
Yes, but efficiency will be reduced.
This system uses an insulated tank to store heat collected during the day for use at night. Even on cloudy days, the collector absorbs diffuse solar radiation to generate heat. In cold regions, evacuated tube collectors are preferred for their higher efficiency, and antifreeze is added to the system to prevent pipe damage from freezing.
4. How much does it cost to install a solar water heating system?
Prices vary depending on the size, type, brand, and installation difficulty of the system; there is no universal standard.
The initial investment for a typical residential solar water heating system (for 3-5 people) typically ranges from several thousand to several tens of thousands of RMB.
However, in the long run, it can largely replace electric or gas water heaters, saving significant electricity or gas costs, and the investment is typically recouped within a few to ten years.
5. Does a solar water heating system require significant maintenance? Maintenance costs are very low.
The system itself is very reliable. Key maintenance requirements include:
Keep the collector surface clean and regularly remove dust and debris to ensure light transmittance.
Regularly inspect the integrity of pipes, valves, and insulation.
In hard water areas, the tank may need to be inspected every few years for scale buildup. For larger systems, an annual professional inspection is recommended.
6. What is its service life?
A qualified solar thermal system has a long service life.
Core collector components (such as the absorber and evacuated tubes of a flat-plate collector) are typically designed to last at least 15-20 years.
The service life of the insulated tank is approximately 10-15 years.
Accessories such as pumps and controllers may need to be replaced sooner.
7. Can solar energy alone meet all my hot water needs?
This depends on climate conditions, water consumption, and system configuration.
On sunny days, a well-designed system can easily provide 100% hot water. To ensure hot water supply during rainy days, all systems are equipped with an auxiliary energy backup system (typically an electric heating rod or in conjunction with a gas or electric water heater) to ensure a constant supply of hot water.
8. What are the main applications of large-scale solar thermal systems?
Large-scale systems are primarily used in commercial and industrial settings, not homes:
District heating: Providing centralized heating and hot water to entire communities or towns.
Industrial process heating: Providing heat for production in industries such as food processing, textiles, and chemicals.
Agricultural applications: Used for greenhouse heating and grain drying.
Pool heating: Heating large public or hotel swimming pools.
9. What policies support the installation of solar energy systems?
Many countries and regions have introduced preferential policies to encourage the use of renewable energy, such as:
Upfront investment subsidies: A one-time cash subsidy is provided upon installation.
Tax exemptions: Purchase tax, property tax, and other exemptions may be available.
Green credit: Low-interest loans are provided.
For specific policies, please consult your local energy department or relevant policy documents.
