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 50kg of ice per sunny day, which is enough to chill
up to 100kg 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 of rural
refrigeration, please visit www.SaveTheFood.org Thank you.