Pressure Collector

　　The evacuated tube collector consists of collecting box with heat transfer unit. The insulated collecting and distribution pipes are located inside the collecting box. The advance or return co nnection can take place alternatively on the left or o n the right. In each evacuated tube there is a U pipe with direct flow-through that is connected in such a way to the collecting or distribution pipe that each individual evacuated tube exhibits the same hydraulic resistance. This U pipe is pressed to the inside of the evacuated tube with the heat guide plate.

　　The selective coating in the inner cover of the evacuated tubes ensures high energy absorption and low heat radiance losses, which convert solar energy into heat energy and transfer to U metal tubes by fins. The medium (water or anti-freezing liquid) in the metal tube has been heated up, and conduct the heat energy to the water inside the storage tank through plate heat exchanger. The controlling system can control also the condition of heat exchanging between collector loop and the water in the storage tank.
The evacuated tube collector with U metal tubes can be quasi-tracking in four seasons; the collector will be in operation as long as sun shines. This collector can be in service all year around even in cold climate areas in combination with fuel or electricity.

- Highly efficient absorber of high performance with daily average efficiency over 50%;

- Operation pressure of 6 bar Maximum 10Bar; can be connected directly with city water pipe.

- No water inside the evacuated tubes; the solar water heater can still in service even with several tubes breakage;

- Highly efficient insulation with polyurethane foam

- Simple structure, easy to assembly and install, diffuse flat plate reflector can be assembled easily with its module structure;

- Can be used all year round in the cold climate;

- Can be used together with Auxiliary electric boost;

- Automatically controlled;

- Large-scale solar hot water system can be installed either with parallel or series connections.

Technical Data

　　ressure collector can be used in forced circulation system both for domestic and for large- scale water heaters.