EN
Vacuum Tube Non-pressurized Solar Water Heater
Capacity:5L-20L
Application:
Non-pressurized solar water heater
Pre-heated solar water heater
- Introduction
- Main features
- Specifications
- Accessories
- Recommended
Product Introduction
The working principle of a vacuum tube non-pressurized solar water heater is primarily based on the thermosiphon effect and natural circulation.
Heating Process
When sunlight strikes the vacuum tube, the solar radiation passes through the outer tube and is efficiently absorbed by the selective absorption coating on the outer surface of the inner tube (solar absorptivity ≥ 0.92, thermal emissivity ≤ 0.09 at 80°C). The absorbed solar energy is converted into heat, warming the water inside the vacuum tube. Due to the vacuum layer, heat loss through conduction or convection is almost entirely prevented, allowing the heat to be transferred only to the water inside the tube.
Natural Circulation
As the heated water warms up, its density decreases, causing it to rise into the storage tank. Meanwhile, cooler, denser water sinks from the tank to the bottom of the vacuum tubes. This continuous cycle of cold water sinking and hot water rising gradually raises the temperature of the water in the entire storage tank.
Main features
The features of Vacuum Tube Non-pressurized Solar Water Heater:
High-Efficiency Heat Collection: Vacuum tubes are more efficient than flat-plate collectors, with higher sunlight utilization.
Cost-Effective: Non-pressure design makes it affordable for homes, hotels, schools, and other facilities.
Reliable & Durable: Non-pressure structure resists aging, has low failure rates, and a long lifespan.
Fast Heating: Vacuum tube insulation and light concentration enable rapid heating in small areas.
Corrosion & Aging Resistance: The vacuum inside the tubes prevents oxidation and corrosion, ensuring long system life with minimal maintenance.
Specifications
Inner tank: Stainless steel SUS304-2B or SUS316L
Out tank: Galvanized steel /stainless steel
Insulation: High density PU foam
Vacuum tube: High Borosilicate glass 3.3, ALN/AIN-SS/CU coating , ø58-1800mm
Support frame: Galvanized steel /stainless steel / aluminum alloy Options
Capacity: 50L-350L available
Accessories: Assistant tank /Electric heater / Controller
| Model | Absorbing Area (m²) |
Vacuum tube | Tank Capacity (Liter) |
MOQ | Qty(sets) /40HQ | ||
| Diameter(mm) | Length(mm) | QTY(pcs) | |||||
| DM - CNP80 | 0.64 | 58 | 1800 | 8 | 80 | 235 | 235 |
| DM - CNP100 | 0.8 | 58 | 1800 | 10 | 100 | 200 | 200 |
| DM- CNP120 | 0.96 | 58 | 1800 | 12 | 120 | 170 | 170 |
| DM - CNP150 | 1.2 | 58 | 1800 | 15 | 150 | 141 | 141 |
| DM - CNP180 | 1.44 | 58 | 1800 | 18 | 180 | 118 | 118 |
| DM - CNP200 | 1.6 | 58 | 1800 | 20 | 200 | 108 | 108 |
| DM- CNP240 | 1.92 | 58 | 1800 | 24 | 240 | 90 | 90 |
| DM - CNP300 | 2.4 | 58 | 1800 | 30 | 300 | 72 | 72 |
Accessories
| Feeder SS | Assistant Tank | Incoloy 800/316L | Electric Heater |
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Capacity: 5L-20L Application: Non-pressurized solar water heater Pre-heated solar water heater |
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Reted Voltage: 220V Rated Power: 1500W,2500W Connection Size: 1 inch Material: Incoloy 800/316L |
| TK-SC8 | Intelligent Controller | ||
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Power supply: 110V/220V Suitable power of elecirical heater, ≤ 2000W Temperature range of measurement: 0~99°C Electromagnetic valve: DC12V/AC220V， Main functions: 1. Water temperalure'water level display； 2. Water level pre-set； 3. Manual wwater loading； 4. Timing heating； Application: Non-pressurized solar water heater |
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