Solar Collector
Vacuum Tube U-Pipe Solar Collector
U-pipe collector for high-pressure closed-loop systems.
- U-pipe circulationUniform flow path prevents local overheating
- Direct-flow designNo heat-pipe fluid, lower maintenance cost
- Flexible layoutHorizontal or vertical installation possible
- Scalable manifoldSuitable for medium-to-large projects
| Area | 2.0m² |
|---|---|
| Type | U-pipe |
| Coating | AL-N/AL |
| Pressure | 0.6MPa |
Product Introduction
The U-pipe solar collector uses a continuous U-shaped copper pipe inside each vacuum tube. A heat-transfer fluid circulates through the pipe, directly absorbing heat from the selective absorber coating.
Compared with heat-pipe collectors, U-pipe systems allow higher flow rates and are easier to integrate with existing boiler or heat-pump circuits, making them popular for hotels, schools, and commercial buildings.
All wetted parts are made of copper or stainless steel, and the manifold is insulated with high-density polyurethane foam for all-weather reliability.
Main Features
- U-shaped copper flow pipe in every vacuum tube
- Direct forced circulation with existing pump station
- Horizontal or vertical collector orientation
- Modular manifold from 12 to 50 tubes
- High-density polyurethane manifold insulation
- Compatible with glycol mixtures for freeze protection
Specifications
| Model | Tubes | Aperture Area | Absorber | Flow Rate | Working Pressure |
|---|---|---|---|---|---|
| EP-UP12 | 12 | 1.12 m² | SS-AL/N/AL selective | 0.5-1.0 L/min | 0.6 MPa |
| EP-UP18 | 18 | 1.67 m² | SS-AL/N/AL selective | 0.8-1.5 L/min | 0.6 MPa |
| EP-UP24 | 24 | 2.23 m² | SS-AL/N/AL selective | 1.0-2.0 L/min | 0.6 MPa |
| EP-UP30 | 30 | 2.79 m² | SS-AL/N/AL selective | 1.2-2.5 L/min | 0.6 MPa |
Item Details
Hydraulic Design
- Serpentine path
- U-pipe doubles back inside the tube to maximize heat exchange.
- Balanced flow
- Manifold headers are sized to keep flow evenly distributed.
- Drain-back option
- Can be configured for drain-back freeze protection.
Installation Notes
- Pump station
- Use a pump station with flow meter and air vent.
- Expansion vessel
- Size expansion vessel to 10% of total loop volume.
- Pipe sizing
- Primary loop DN20 or DN25 depending on collector bank size.
Certifications
- Solar Keymark
- Tested to EN12975-1/2 standard
- ISO 9001
- Manufactured under certified quality system
- CE marking
- Compliant with EU pressure equipment directive
Core Application Scenarios
- 01Commercial hot-water projects
- 02District heating stations
- 03School and hospital dormitories
- 04Industrial process heat
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