For Professionals
Find installers now!
Get free local quotes
Cut your energy costs
Improve your home's value
  • Projektdaten
  • Angebote
Project Type
Please fill out this field
Tätigkeit
Please fill out this field
Area to be heated
Please fill out this field
Type of Solar Thermal
Please fill out this field
Your Utility Company
Please fill out this field
Avg. Monthly Electric Bill
Please fill out this field
Property Type
Please fill out this field
Type of Area
Please fill out this field
Choose the status of your project
Please fill out this field
What is the Timing of your project
Help contractors to schedule your inquiry
Please fill out this field
Fachbetriebe finden & kostenlos Angebote anfordern
Complete your request to receive free local quotes
Please fill out this field
Please fill out this field
Please fill out this field
Please fill out this field
Please fill out this field
Please fill out this field
    Please fill out this field
    3 min. left

    Vacuum creates near perfect insulation

    An evacuated solar tube collector is designed to capture sunlight and convert it into warmth. The evacuated tube collector is more expensive than the flat plate collector, but suffers less from heat loss due to its superior insulation.

    All air is pumped out of each evacuated solar tube collector to create a vacuum. A vacuum is one of the best insulators known. Creating a well insulated evacuated solar tube collector is essential; it helps keep the tubes from cooling down in cold weather conditions. After absorbing  radiation from the sun, the collector converts the radiation into heat. Heat from the evacuated solar tube collectors warms the heat transfer fluid which is then brought to the heat storage cyclinder.

    Each evacuated solar tube collector is made out of 10 to 30 different individual tubes. They can be direct flow evacuation tubes or so-called heat pipes (the heat transfer fluid does not pass through the pipes).

    Advantages and disadvantages of the evacuated tube collector

    Due to its superior insulation, the evacuated tube collector is much more efficient than the flat plate collector. You need less solar collectors to achieve a certain energy input - or get more energy from the same space.

    But while an evacuated tube collector is about 10 to 15 percent more efficient than a flat collector, it is also more expensive. Customers should carefully consider how much solar energy they will really need to suit their purposes. In many of cases, an array of flat plate collectors might be enough to do the job.

    The positioning of evacuated solar tube collectors is vital in maximizing their efficiency. A flat layout is very ineffective, as the tubes will receive less solar radiation.

    Experienced solar installiers will help you to plan and install evacuated solar tube collectors for your solar water heating system.