The fin spacing has a significant influence on the resulting surface area of a heat exchanger: a smaller fin spacing means that more power can be transferred. If the fin spacing is too small, there is a high risk of frequent defrosting, which is not very efficient.
For evaporators, the energy-efficient operation of CO2 deep-freeze applications always goes hand in hand with the balance between the size of the fin spacing vs. the necessary defrosting cycles. For the use of CO2 in deep-freezing, Roller has now developed an optimised tube system for evaporators that meets the specific requirements of CO2 (PS 80bar!) for small tube diameters of 9.52 mm combined with a maximum fin spacing of 12 mm.
Large fin spacing becomes interesting for applications such as
Cold rooms with increased humidity input due to frequent door opening by charging
No strip curtain between two cold rooms
No pre-cooling room available
The new Roller heat exchanger with 12mm fin spacing contributes to increased energy efficiency of the overall system by reducing the number of defrosting cycles required. Thanks to its stable construction with a 9.53 mm core tube and a 0.3 mm thick fin, the heat exchanger block can also easily withstand mechanical strain, for example when cleaned with a high-pressure cleaner.
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