For energy-efficient operation of CO2 deep-freeze applications, the fin spacing of evaporators is always an issue. With a small fin spacing, more power can be transferred, but the risk of heavy, disruptive icing increases, which results in frequent defrosting processes and thus reduces efficiency. Roller offers you an optimised heat exchanger system for evaporators that meets the specific requirements of CO2 (PS 80bar!) for small tube diameters of 9.52 mm, coupled with a maximum fin spacing of 12 mm.
CO2 has become the most important natural refrigerant in refrigeration technology for food retail. However, CO2 alone does not make an energy-efficient system. To support the energy-efficient features of CO2 in the system technology, it requires a fin system for evaporators that optimises the high-energy defrosting costs in deep-freezing.
Generally, 6-8 mm fin spacing is used in deep-freezing. Even this distance can be too small if the deep-freeze room is exposed to increased humidity. Frequent defrosting intervals are the result.
For defrosting, both the direct and indirect costs have to be included in the energy cost calculation. The direct costs refer to the electrical defrosting of the ice from the evaporator, the indirect costs to the defrosting heat generated in the room, which must be released again by the refrigeration system when it restarts.
Reduced defrosting intervals coupled with shorter defrosting phases and thus lower energy consumption make a significant contribution to energy-efficient system operation.
FHV / FHVT - Highly efficient, compact evaporator in flat design
The FHV high-performance air cooler is particularly suitable for cooling and deep-freezing requirements in commercial refrigeration.
Its particularly compact dimensions combined with the large variety of accessories and options, its efficient defrosting behaviour, and its ability to be used with the refrigerant CO2 offer excellent conditions for a wide range of commercial applications.
DLK / DLKT - Flat ceiling evaporator for demanding applications
Due to its flat and robust design, the DLK is suitable for all cold rooms that are subject to special requirements. Be it frequent foot traffic, aggressive particles from a wide variety of goods, or temporarily different purposes.
With its uniform air distribution, it ensures a stable room temperature and withstands the highest hygiene requirements due to its corrosion resistance.
- FHV / FHVT - Highly efficient, compact evaporator in flat design
- DLK / DLKT - Flat ceiling evaporator for demanding applications