Thursday, May 13, 2010

A $1K Solar Water Heating System from the UK

This is a very nicely designed and built system by Neil in the UK. 

While the system is modeled after our $1K system, Neil has included a number of unique features including a fiberglass tank liner, a very nice large copper coil heat exchanger, integration with a combi boiler system, and a unique design for the collector absorber plate. 

Some of the highlights

The tank is tall with a small footprint in order to take up less floor space. 

Instead of using an EPDM membrane for the waterproof liner, Neil used several layers of fiberglass to provide the waterproof lining.

The collector absorber plate is a unique design that  uses a single sheet of aluminum that all of the riser tubes are thermally bonded to. 

The thermal bonding is provided by a narrow, grooved strips of aluminum that snap over each riser tube and then riveted to the

full width aluminum sheet.

Heat Exchanger
Neil made a very compact and efficient single pass heat exchanger from copper tubing as shown in this picture.

The full 26 pages writeup on how to make this system...

Details on may other solar water heating systems...

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