Born to Freeze

      CO 2 comes as the natural choice as refrigerant for various applications, from the food retail applications to the industrial refrigeration .  This trend is confirmed worldwide, and Africa follows rapidly the latest trends in refrigeration. The leading country for installations in Africa is so far South Africa both in subcritical and in transcritical installation where, thanks to the excellent design of HC Heat-Exchangers and the Dorin CD range, CO2 is able to perform efficiently even at high ambient temperature. HC Heat-Exchangers chooses Dorin compressors to cover the retail supermarket business helping the transition to natural refrigerants while improving the efficiency of the system compared to the equivalent old HFC system. Giving 116kW MT @ -10°C and 48kW LT @ -35°C HC Kronos is installed in several domestic supermarkets, granting excellent performance in terms of COP and reliability of the system. The system is design with CD transcritical 4...

    The installation of air-cooled condensing unit , although simple, requires some precautions. The condensing unit requires correct positioning for a good ventilation which avoids the recirculation of air which can cause condensation problems. Furthermore, the correct sizing of the liquid and suction pipes is important for the proper functioning of the system. It is important to avoid the backflow of lubricant and liquid refrigerant to the compressor when the condensing unit stops.   It is necessary to provide suitable siphons at the base of each vertical section with an upward direction of the flow; if the discharge line is of high vertical development which connects the compressor to the remote condenser, that is installed at a higher altitude, it must be equipped with an adequate number of siphons. Even the suction line, the pipe that connects the evaporator to the compressor suction, must meet certain requirements such as: • favor the return of oil to th...