Solar thermal hot water systems harness solar energy to heat hot water. The system consists of solar panels, or ‘collectors’, which absorb the sun’s heat (solar radiation). A transfer system uses this energy to heat water, which is then stored in a hot water cylinder until required. An auxiliary water heating system is required to work with the solar thermal system to ensure water is stored above the required 60oC and to compensate for times of low radiation levels.
Solar water heating is generally used for domestic hot water, although it can be used in larger applications, for space or swimming pool heating. The size, orientation and pitch of the roof all affect the suitability of a premise for solar thermal heating. More detailed information about this small-scale renewable energy technology is provided in this section.
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