Solar Water Heater
Heat Pipe Pressurized Solar Water Heater
Heat-pipe pressurized system for high-pressure, all-weather hot water supply.
- Heat PipeRed copper, rapid heat transfer
- Vacuum TubeBorosilicate glass 3.3, Φ58×1800
- Pressurized TankSUS304-2B / SUS316L, ≤ 7 bar
- Heat Retention≥ 72 hours
| Capacity | 100L – 300L |
|---|---|
| Type | Heat-pipe, pressurized |
| Material | Stainless steel inner |
| Warranty | 5 years |
Product Introduction
The heat-pipe solar collector is always connected with the existing water-heating device. The selective absorber coating on the inner cover of the vacuum tubes absorbs solar energy, converts it into thermal energy and transfers it to the heat pipe through an aluminium fin. The heated liquid inside the heat pipe changes into vapour, which rises to the top condenser; the thermal energy then passes through the heat exchanger into the pressurized tank, and the cooled vapour becomes liquid again, returning to the base of the heat pipe.
Thermal energy is conducted to the transfer liquid inside the pressurized tank via a copper coil. As long as the collector is heated by the sun, this creates a continuous, frost-protected circulation that delivers stable high-pressure hot water throughout the building.
Because the tank is pressurized, hot water flows at mains pressure — stronger showers, faster filling and direct compatibility with standard mixers and appliances. No roof-top tank or auxiliary circulation pump is required, which simplifies installation and reduces running cost.
Main Features
- High-efficiency heat collection: ALN/AlN-SS/Cu selective absorption coating delivers absorptance of 0.93–0.96 with emissivity as low as 0.04–0.06.
- Stable pressurized water supply at mains pressure — stronger showers and direct appliance connection, with no roof tank needed.
- Heat-pipe design: each tube works independently; a single broken tube will not drain the system and can be replaced without shutting it down.
- Reliable in low-temperature regions, with normal operation down to −50 °C; the heat pipe freeze protection suits cold climates.
- High-density polyurethane foam insulation keeps water hot for 72 hours or more, cutting standby heat loss.
- ISO 9001 certified; built-in T/P safety valve and magnesium rod protect against overpressure, overheating and scale build-up.
Specifications
| Model | Absorbing Area (m²) | Tube Dia. (mm) | Tube Length (mm) | Tubes (pcs) | Tank Capacity (L) | Loading 40HQ / 20GP |
|---|---|---|---|---|---|---|
| EPT-100 | 0.80 | 58 | 1800 | 10 | 100 | 178 / 70 |
| EPT-120 | 0.96 | 58 | 1800 | 12 | 120 | 158 / 62 |
| EPT-150 | 1.20 | 58 | 1800 | 15 | 150 | 128 / 51 |
| EPT-200 | 1.60 | 58 | 1800 | 20 | 200 | 98 / 39 |
| EPT-240 | 1.92 | 58 | 1800 | 24 | 240 | 80 / 32 |
| EPT-300 | 2.40 | 58 | 1800 | 30 | 300 | 68 / 27 |
Item Details
Solar Vacuum Tube & Heat Pipe
- Tube Material
- Borosilicate glass 3.3 (high temp resistance, low thermal expansion)
- Size (Dia. × Length)
- Φ58mm × 1800mm
- Absorption Coating
- ALN/AlN-SS/Cu selective absorption coating
- Absorptance (α)
- 0.93 – 0.96 (AM1.5)
- Emissivity (ε)
- 0.04 – 0.06 (80 °C ± 5 °C)
- Heat Pipe
- Φ14×1700mm red copper with aluminium heat-conducting fins
Pressurized Water Tank
- Inner Tank Material
- Food-grade SUS304-2B / SUS316L stainless steel
- Outer Tank Material
- Color steel / Stainless steel / PVDF (optional)
- Insulation Layer
- High-density polyurethane foam
- Heat Retention
- ≥ 72 hours
- Working Pressure
- ≤ 7 bar
- Safety Accessories
- T/P safety valve (overpressure/overtemp), magnesium rod (anti-scale)
Support Frame
- Material
- Galvanized steel / Aluminum alloy / Stainless steel (optional)
- Surface Treatment
- Rust-proof, suitable for outdoor installation
- Low-temperature Resistance
- Normal operation at −50 °C
- Service Life
- ≥ 15 years
Core Application Scenarios
- 01Residential: family showers and daily hot water supply at stable mains pressure
- 02Small commercial: convenience stores, small hotels, guesthouses and gyms
- 03Priority adaptation: regions requiring stable high-pressure hot water and low-temperature performance
- 04Cold-climate areas, villas and remote sites where freeze protection matters
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