Solar Water Heater Collector, simple, single panel design shown here uses a standard pressed steel central heating radiator

Solar Water Heater Collector

flat-plate solar collector and water tank, Flat Solar Collector Design.The simple, single panel design shown here uses a standard pressed steel central heating radiator as the solar collector. These are relatively cheap and readily available either as new or second-hand (if using a second-hand radiator panel, remove any decorative paint from the front surface and re-prime as necessary). The thermal efficiency of a collector using a central heating radiator should be comparable with many commercially available designs. However the relatively large water content will make it slow to respond especially at low levels of solar radiation. The panel should be a single panel without fins and with tapped connecting holes at all four corners so that the necessary 'diagonal' flow of water is easily achieved. Other types with only two connections can be used providing that the connections are at diagonally opposite corners. The panel needs to be painted with matt black oil paint to give a high absorbent surface. All pipework within the case should be insulated to prevent collected heat escaping back into the case.

Solar Water Heater Collector