www. refrigerationandaircon. co. za RACA Journal I August 2025 43
Technical operational stability and thus extends the lifetime. Regardless of the size of the oil cooler, the OWD series optimises flow velocity with adjusted baffle distances, thus achieving an optimal balance between heat transfer and pressure drop, even with larger devices.
The OWD series is designed to reduce dead space in the heat exchanger compared to its predecessor, the OW series, which is a great benefit. The result is increased efficiency in the use of the entire tube surface and a boost in heat throughput. In addition, the optimised space requirement enables integration of a
Fig. 2: Nominal conditions Toil: 80 ° C to 50 ° C; TH2O: 30 ° C to 35 ° C; highly viscous higher number of tubes for ultra-high power density. oil( BSE170)
Calculations show that the new oil cooler series use in heat pump and low temperature applications in maritime reduces CO2 equivalents by more than 40 % compared to the and industrial sectors as well as in the high temperature range. predecessor and thus makes a key contribution to sustainability.
The baffles are also temperature-resistant and can easily SELECTION AND SOFTWARE withstand temperatures of over + 150 ° C, making the OWD
The OWD series can be combined with BITZER open series well equipped for demanding environments. drive OS and semi-hermetic HS screw compressors in the Using state-of-the-art methods such as flow simulations BITZER SOFTWARE.
( CFD) and extensive laboratory experiments, the OWD series
BITZER SOFTWARE allows users to manually select has been specially developed for applications in refrigeration the compressor of their choice or recommends a suitable and heat pump technology. Thanks to precise coordination with compressor based on capacity, operating conditions and requirements and optimisation for use with BITZER products, it specific requirements. Once the compressor has been specified, ensures extraordinary efficiency and operating reliability.( Fig. 3) the accessories can be selected. If it is an HS or OS compressor,
the BITZER SOFTWARE calculates the required cooling
A WIDE RANGE OF APPLICATIONS capacity and, if necessary, recommends a suitable oil cooler.
Designed for reliable use in a whole host of applications, the Alternatively, the user can select the“ External oil cooling”
OWD series is compatible with fresh water and seawater and option manually in the‘ Additional cooling’ section. With all the covers a wide range of temperatures and pressures. It can relevant technical data presented in a straightforward format, handle oil temperatures of – 20 ° C to + 150 ° C, oil pressures of up the user can make adjustments based on their requirements to 32 bar and water temperatures of – 20 ° C to + 95 ° C at 10 bar. and review the selection. Temperatures can also be customised
OWD oil coolers fulfil stringent requirements in terms on the secondary page, thus guaranteeing optimal coordination of temperature resistance, pressure strength and corrosion of components. This automated process simplifies configuration protection, and comply with the stipulations of the CE-PED, and ensures an efficient, reliable system design. SELO CML, BV and DNV certifications, which qualifies them for
Fig. 3: Flow simulation( CFD)
www. refrigerationandaircon. co. za RACA Journal I August 2025 43