The Vitosol 300-T high performance vacuum tube collector operates according to the proven heat pipe principle. It consequently offers particularly high operational reliability. One of the specific applications of the Vitosol 300-T is in systems with long phases of high solar irradiation without heat transfer, so called stagnation phases. The dry connection of the heat pipe tubes inside the header and the integral temperature limiter ensure particularly high operational reliability.
In heat pipe systems, the solar medium does not flow directly through the collector tube. Instead, a process medium, which circulates in the copper pipe below the absorber, evaporates when subjected to solar irradiation, and transfers the heat to the solar medium via a heat exchanger.
The condensers are completely surrounded by the patented Duotec twin-pipe heat exchangers. This absorbs the heat particularly well and passes it into the heat transfer medium flowing past it.
The collectors are rapidly interconnected through the reliable stainless steel corrugated pipe plug-in connectors on installation. The individual tubes can be precisely aligned with the sun by axial rotation. The tubes are connected in a dry state, i.e. without contact between process and heating medium. Ensuring a perfect tube connection. It is also possible, for example, to replace individual tubes when the system is already filled.
The temperature limiter integrated into the Vitosol 300-T protects the system against overheating during longer idle periods.
High quality corrosion-resistant materials ensure reliability, operational safety and durability. Among others, glass, aluminium, copper and stainless steel are used.
■ Highly efficient vacuum tube collector based on the heat pipe principle for high operational reliability
■ The absorber surfaces with Sol-titanium coating, which are integrated into the vacuum tubes, are not susceptible to contamination
■ Efficient heat transfer through fully encapsulated condensers inside the twin-pipe Duotec heat exchanger
■ Tubes can be rotated for optimum alignment with the sun, thereby maximising the energy yield
■ Highly effective thermal insulation of the header casing for minimum thermal losses
■ Integral temperature limiter controls the heat flow at very high collector temperatures
■ Easy installation through the Viessmann assembly and connection systems
■ Attractive collector design, header casing in RAL 8019 (brown)
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