· Take two aluminum sheets, print in the same channels in graphite with the desired format;
· The plates are joined by brazing at 500ºC (the brazing does not occur at points where there is graphite);
· The channels are expanded under a pressure of 150 atm, removing all the graphite inside and leaving the shape of the channels.
Plate evaporators made of aluminum using the Roll-Bond system have a Global Heat Transmission Coefficient (K) between 5 and 7 kcal / h.cm², with a space of approximately 30mm between the channels.
The evaporators also have, next to the channels, a suction accumulator. The accumulator is an extension of the evaporator that has the purpose of receiving the load variations and ensuring that the refrigerant in the liquid state does not reach the compressor. In
a Roll-Bond evaporator, this accumulator has the shape of a honeycomb representing 15 to 20% of the evaporator volume.
