Computer Controlled Absorption Refrigeration Unit

Details

The Computer Controlled Absorption Refrigeration Unit, "TRAC", designed by EDIBON, is a complete laboratory unit for the demonstration of absorption refrigeration. This unit is provided with a dual power source (heat source) of LPG and electricity. A pressure regulator to adapt the gas to the corresponding inlet pressure (30 – 50 mbar) is supplied for the operation with LPG. The fluid used in the refrigeration cycle of the "TRAC" unit is a solution of water and ammonia (NH3), being ammonia the refrigerant and water the absorbent. An important advantage is that these agents are totally innocuous for the environment. The cycle uses the great affinity of ammonia with the water, being the ammonia used as refrigerant since it is easily absorbed by water. The water and ammonia solution is heated at a high pressure in the generator or heater. Two substances are separated then by boiling: on one hand, vapour with a high concentration of ammonia, called concentrated solution, and on the other hand, a liquid solution with a low concentration of ammonia, called diluted or poor solution. Vapour passes through a condenser (finned exchanger) where it is cooled until it condenses and passes t