Deuss System

From 1981 the BACIBO Foundation has been actively involved in installing hot
water systems powered by solar energy. On the WOT test field there is an
example of such a system. The hot water systems are build for distant
hospitals, clinics, revalidation and training centres in developing countries.
They replace existing wood burning hot water systems. The construction is
simple but proper and locally available materials are used. Local craftsmen are
trained in producing the solar collectors and building and maintaining the
systems. With BACIBO’s help at least 60 solar heaters were placed in at least
25 different locations in developing countries between 1981 and 2006.
The picture below shows the Deuss-system schematically.

Cold water flows through a pipe (1) into the bottom of the storage tank (2).
Then the water flows to the bottom of the solar collectors (3). The water is
heated and returns through natural circulation to the storage tank (4). The hot
water can be taken out of the storage tank through a tap (5). To prevent
pressure from building in the tank a ventilation opening (6) is present. The
collectors in the Deuss-system are zigzag collectors.