A horizontal tubular evaporator is used in our case, and is immersed in water which is intended to form ice during
adsorption phase. The role of ice is to maintain the temperature of the refrigeration compartment to be cooled during
the desorption phase and night. A coil condenser must be long enough to condense all the overheated vapours of
methanol, which are released from the adsorbtion collector during desorption (heating phase).