The (CAT) Centre for Alternative Technology clip fin solar water heating panel is a simple collector using an aluminium extrusion. Other components used are timber and copper plumbing, easily available from DIY stores and builders merchants.
The plans for this system are available from the CAT’s mail order service.
One of the best ways to ensure success is to attend one of the residential training courses run by CAT.
Jenny Bailey, Dave Brooke, Bernie Wright and I subscribe to CAT's residential training course on solar heated water in June 1999.
|The timber frame is constructed, then filled with insulation and covered in foil.|
|22mm and 15mm copper pipe is soldered together.|
aluminium fins are clipped to the pipe work. A dab of silicone rubber
secures the fin.
The silicone also assists with coupling the heat from the fin to the pipe. Silicone rubber conducts heat better than air.
|The array is inserted into the frame.|
|A transparent plastic sheet is fitted.|
|A panel is tested during an overcast afternoon. A simple thermo siphon is set up with some pipe and a bucket. There is some heat collected - the water temperature creeps up from 11°C to 28°C after 15 minutes!|
are shown several techniques for fixing the panel to a roof.
Here we try one technique: holding it.
|The group looks on.|
|A serious PV Array|
Some of us are to meet again in 2002, doing something very similar!