Solar PV/Thermal | Solar Thermal
Solar Thermal Collector Diagram
This method is used primarily for Domestic Hot Water, but increasingly it is being used for generating energy for space heating as well. Panels are connected to a solar cylinder to store hot water for plumbing or heating distribution.
There are two types of collector systems:
• Flat Panel collectors where liquid is circulated through
• Evacuated tube collectors which are made up of cylinder
shaped tubes sitting side by side, they collect energy
from all sides of the tube
Both systems heat the coil in the cylinder which in turns heats the water for your home.
Ideal position for maximum efficiency is on a south facing roof however panels can be fitted on East-West split orientation too. Main points for consideration are; the angle of the roof (optimum 30-40deg) and also location of the roof to ensure there are no shaded areas where panels are being installed. Both of these factors will directly impact on the performance of your panels.
•In roof (flush with roof tiles)
•On roof (sitting on top of tiles)
Please note that evacuated tube systems can only be fitted on roof!
In the summer up to 100% of hot water requirements can be heated with solar technologies,
however in the winter, with less sun and fewer daylight hours, about 30% of the requirement
can be reached. Heat pump systems are often used alongside Solar Thermal systems to
supplement the hot water requirements, but traditional boilers or immersion heaters can
also be used.
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