Vacuum Tube Solar Air Collector

Product Advantages:

1. Use free air as heat transfer medium, inexhaustible and inexhaustible;

2. Double-pass direct-flow heat collecting tubes, the head and the tail are connected, the ventilation resistance is small, and the air volume is large;

3. High-efficiency vacuum tube, high absorption rate, low scattering rate, high temperature resistance, and high cold resistance;

4. Constant temperature foaming technology, high pressure injection process,360-degreelong-term temperature lock;

5. Durable in harsh weather; can exceed 280°C in operation.

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Product Details

Innovative Vacuum Tube Air Solar Heating Solution:

The vacuum tube solar air collector revolutionizes solar thermal systems with its direct-flow dual-pass glass vacuum tube design, featuring interconnected tube ends that eliminate traditional issues like pipe bursting and freezing. Leveraging interference coating technology, it ensures high-temperature resistance, cold tolerance, and optimal solar absorption. An integrated expansion joint in the inner tube safeguards against thermal shock damage, while air-based heat transfer efficiently converts solar energy into indoor heating. Designed for high efficiency and low maintenance, this system excels in multi-energy integration applications, delivering reliable warmth with adjustable airflow.

Technical Parameters and schematic diagram:

Collector type		DVC500	DVC850
outline dimension （mm）		2430×2100×200	4030×2100×200
Specification of double conduit		Φ58×1800	Φ58×1800
Number of dual pipes		30	50
Total area (㎡)		5.1	8.5
Lighting area (㎡)		3.8	6.3
net weight （kg）		75	125
Rated air volume (m³/h)		150	250
Interface size
Number of interfaces
Total heat loss coefficient
maximum working temperature		0.76	0.76
Peak efficiency		0.66	0.66
rated efficiency ①		2.5	4.2
specified	400W/m²	0.76	1.62
power （kW）②	700W/m²	1.25	2.69
	1000W/m²	2.5	4.2

真空管空气集热器原理图-2.jpg

Vacuum Tube Air Solar Heater Features:

1. Double pass vacuum tube air collector to “air” instead of liquid medium as a heat transfer medium, the heat absorbed by the heat-absorbing plate to heat the air after the natural/forced circulation of the hot air to the end of the heat, which can be used directly for heating or indirect heat supply equipment through the heat exchanger;

2. The core component is the patented expansion joint structure all-glass double-pass vacuum collector tube;

3. Magnetron sputtering selective coating, absorption rate: 93% (± 2%@AM1.5), emission rate: 6% (± 2%@80℃);

4. High temperature operation, the maximum operating temperature of 280 ℃ or more;

5. System light and heat conversion efficiency of more than 80%, maintenance-free, safe and reliable;

6. High temperature, cold, high altitude, no freezing and plugging leakage potential, no worries, can be used for more than 50 years; 7, combined with air source heat pump into a coupled heating system, can improve the air source heat pump COP in cold areas.

Vacuum Tube Solar Air Collector Key Applications:

Ideal for standalone buildings requiring daytime heating—such as school classrooms, office complexes, workshops, and transportation hubs—the DVC system also supports industrial drying applications.

Company Introduction:

Dezhou BTE Solar Co.,Ltd is mainly engaged in the export business of the Soletks group's products. It is a backbone export enterprise in the solar energy industry in Shandong Province, a key foreign trade export enterprise in Dezhou City.

There are 6 production bases and 7 branches . Now solar collector annual output can reach 3 GWh. Ranking the 3rd in the world for three consecutive years from 2017 to 2019, and the 2nd from 2020 to 2021.

BTE has always regarded technological innovation as the core competitiveness of the enterprise. It has 4 technical departments, 1 flat panel research institute.1 testing center and 1 thermal energy Institute. The scientific research personnel account for 16%, of which 50% have been in this field for more than 20 years.

At present, we has 58 core patents. Now solar collectors can use civil buildings, military facilities, industrial heating, planting, breeding, drying and other fields to provide high-quality thermal energy, heating, refrigeration, heating and other clean energy comprehensive utilization services.