The ISAAC Solar Icemaker operates on the
ammonia absorption refrigeration
technology. Ammonia absorption is used in
industrial and commercial refrigeration. In
domestic refrigeration, it was replaced by
modern refrigeration with the development
of electricity and freon refrigerants long ago.
But now it is important for small-scale uses
because of the need to conserve electricity
and fossil fuel and because of the needs for
food security, especially in rural unelectrified
The operation of the ISAAC is diagrammed below. It operates in two modes to complete the cycle. During
the day, solar energy heats the generator to make ammonia vapor which is condensed and collected. During
the night, the generator cools and reabsorbs the refrigerant As the refrigerant evaporates, the water in the
evaporator is frozen.
The equipment is very durable. The ISAAC makes up to 50 kg of ice per sunny day, which is enough to chill
up to 100 kg of food for a day. This gives the rural farmers and fishermen more time to market their products
to the urban areas.
The ISAAC Solar Icemaker was developed by Energy Concepts Company. The Solar Ice Company is a
sister company and produces and promotes the solar icemaker.
|To help people in developing nations get the benefits rural
refrigeration, please visit www.SavetheFood.org,
|Solar Ice Company partnered with Heifer Project International
for a demonstration of the ISAAC Solar Icemaker in Kenya.
Please visit Save the Food for more information about and to
help support this project.