Blue Coating Solar Collector

I. Product Introduction

Blue Coating Solar Collector (also known as Super Blue Film Flat Collector) is a new generation of high-efficiency flat solar collector that uses high-selectivity solar blue film (Blue Solar Coating) as the heat absorption coating.

1. Blue Film, also known as Super Blue Film in the industry, has the scientific name of solar spectrum selective absorption coating. This coating is deposited on the metal substrate through physical vapor deposition (PVD) technology using vacuum magnetic control sputtering method. Blue Film has a very high solar absorption rate (α) in the main energy range of solar radiation (approximately 0.25 - 2.5 μm), while it has an extremely low emissivity (ε) in the infrared band (> 2.5 μm), enabling the maximum conversion of solar energy into heat and significantly reducing heat loss.

2. Our company's Blue Coating Solar Collector uses vacuum magnetic control sputtering to vacuum deposit the blue film core. The collector has high heat absorption and low heat loss. The collector is composed of core components such as high-selectivity blue film heat absorption core, high-transparency low-iron ultra-white glass cover plate, all-copper flow channel, aluminum alloy frame, and high-efficiency insulation layer. The product is made using ultrasonic welding or laser welding technology, with strong welding bonding force and low thermal resistance. Blue Film, as the mainstream heat absorption material for domestic high-end flat solar collectors, is used as the core heat absorption coating in about 90% of solar hot water systems in Europe and America.

3. The optimized high-performance blue film has a solar absorption rate of over 95% and an emissivity of less than 5%, and it has good thermal stability, with a service life of up to 25 years. Blue Film Flat Solar Collector, with its advantages of efficient heat collection, pressure-bearing operation, and aesthetic durability, has become the preferred solution for high-end residential and commercial solar hot water projects.

II. How do hot water systems work?

III. Technical Parameter Table

Note : ① Rated efficiency: The total irradiance on the daylighting surface of the collector is 1000W/㎡, and the temperature difference between the average temperature of the collector and the ambient air temperature is 50°C. Calculate the efficiency value of the solar collector according to the instantaneous efficiency equation of the collector's daylighting area.

② Rated power: The total irradiance of the collector lighting plane is 1000w/㎡, and the collector power when the temperature difference between the average collector temperature and the ambient air temperature is 50 ° C is equal to the product of the rated efficiency and the day lighting area and 1000W/㎡.

IV. Product Advantages

1. High Absorption, Low Emission, Excellent Thermal Conversion Efficiency

The core advantage of Blue Coating Solar Collector lies in the high absorption and low emission characteristics of the blue film coating. As a solar spectrum selective absorption coating, the blue film has a very high absorption rate in the main energy range of solar radiation (approximately 0.25 - 2.5 μm), while maintaining an extremely low emissivity in the infrared band (> 2.5 μm), achieving an ideal spectral selective absorption effect. The absorption rate can reach 95% - 97%, and the emissivity is low to 4%-5%.

Research data shows that under the same conditions, the thermal performance of the blue film collector is 75.5%, significantly better than traditional coatings such as black chrome (73.4%) and anodized (69.3%). The blue film coating is like a precise optical filter, converting solar radiation into heat and minimizing heat loss at the same time.

2. Excellent Weather Resistance and Long Service Life

The film layer of flat solar collectors needs to withstand harsh environments such as ultraviolet rays, salt fog, temperature differences, and sandstorms. The weather resistance directly determines the service life of the equipment. Our company's blue film enhances the reliability of the film layer through anti-ultraviolet aging, salt fog corrosion resistance, and heat shock resistance technologies. After being tested by authoritative institutions, even after 25 years of use, the absorption body of the coating still maintains 95% of its initial performance.

3. High Transparency Glass Cover Plate, Maximizing Solar Energy Utilization

The collector is equipped with a 3.2mm low-iron ultra-white textured glass cover plate, with a transparency rate of 91% - 93%. The ultra-white glass uses high-purity raw materials, has a high visible light transmittance and good transparency, allowing the collector to obtain more solar energy; the ultraviolet transmittance is low, reducing the aging impact on other materials. Glass has high strength, heat resistance, and impact resistance, and it has excellent anti-hail and anti-ultraviolet aging properties.

4. All-copper flow channels + high-quality insulation, with minimal heat loss

The flow channels adopt high-purity oxygen-free copper (TP2), with a pipe diameter of ∅22mm. They are corrosion-resistant, can withstand pressure, and have a long lifespan. The flow channels are welded from the back of the coating tape without damaging the heat-absorbing layer, resulting in high heat collection efficiency. The insulation layer uses phenolic resin insulation board + silica aerated cotton or high-density polyurethane whole-foaming, with a thermal conductivity coefficient as low as ≤0.022W/(m·K), effectively reducing heat loss on the back and sides of the collector. The standard stagnation temperature can reach 210℃, and the maximum working temperature is 80-90℃.

5. Pressure-bearing operation + modular design, convenient installation and maintenance

The blue film flat collector operates at a pressure of 0.6MPa (6kgf/cm²), compatible with closed-loop systems, without the risk of vacuum tube burst or leakage. The modular design can be flexibly assembled according to the heat demand, suitable for various installation scenarios such as flat roofs, sloping roofs, and walls. The maintenance cost is extremely low, only requiring regular inspection of the circulating medium.

V. Factory Advantages

As a professional manufacturer in the field of blue film flat solar collectors, our company has a complete industrial chain layout and core technologies:

1. Blue film self-production: The company has a fully automated roll-to-roll vacuum magnetron sputtering production line, independently developing and producing high-selectivity solar blue films. The quality of the blue film is completely controllable from the source, ensuring the performance of the collector. Our company is one of the few enterprises in the world that simultaneously master the core production technologies of blue films and black films.

2. Advanced welding technology: Using ultrasonic welding or laser welding technology, the welding bond strength is strong and the thermal resistance is small, enabling efficient absorption while making the collector more aesthetically pleasing.

3. International authoritative certifications: The products have passed Solar Keymark (EU), CE (EU), ISO 9001, SRCC (USA), etc. Solar Keymark certification is the authoritative pass for solar products to enter the EU market, and products with this certification can apply for government energy-saving subsidies in multiple European countries.

4. Full industrial chain layout: From blue film production, collector manufacturing to system assembly, the company has complete independent intellectual property rights and core technologies.

5. Global market coverage: The products have been exported to 40+ countries around the world, including the United States, Israel, Germany, Spain, etc.

VI. Packaging and Transportation

Packaging method:

• Flat collectors are packaged with export-grade corrugated cardboard + wooden pallets, filled with foam/particle foam for shock absorption

• Each individual item is independently packaged, equipped with desiccant and tilt/shake indicators, providing maximum protection

• Customized packaging can be provided according to customer requirements

Transportation method:

• Support various transportation methods including sea, air and land transportation.

• Full container (20ft/40ft containers) or unpacked container consolidation is available.

• Delivery cycle: 15–25 working days

• Provide one-stop logistics services including export customs declaration and clearance

VII. Application fields

Blue Coating Solar Collector (blue-coated flat solar collector) is widely used in the following fields:

• Hotels/Business hotels - constant temperature hot water supply for guest rooms

• Hospitals - washing, disinfection and domestic hot water

• Schools/Dormitories - centralized hot water supply

• Factory/Enterprise dormitories - employee living hot water

• Villas/High-end residences - perfectly integrated with buildings, beautiful and upscale

• Residential communities/Apartment buildings - centralized or individual hot water supply

• Constant temperature swimming pools - pool water heating

• Solar heating systems - building-integrated solar heating

• Industrial preheating - boiler water preheating and other industrial heating scenarios

Contact us immediately to obtain product quotations and technical solutions!

Whether you are a hotel engineer, real estate developer, school logistics purchaser or an investor in new energy projects, we are willing to provide you with professional consultation and customized solutions for blue-coated flat solar collectors.

Send an inquiry to obtain a dedicated solution!