Refrigerated Sea Water Unit
CB Refrigerated Seawater (RSW) Unit is specifically designed for ocean fishing and offshore processing. By integrating compressor, condenser, evaporator, and full internal piping into a skid from factory, it delivers core advantages of "plug-and-play operation, a compact footprint, and rapid site installation," significantly shorten shipbuilding and retrofit cycles.
The system is equipped with a single-stage screw compressor with an inverter motor. All heat exchangers utilize seawater-corrosion-resistant titanium tubes to withstand extreme corrosive marine environments. Featuring an optimized shell-and-tube evaporator, seawater flows through the tubes with high rates and volumes while the refrigerant evaporates efficiently on the shell side, delivering outstanding heat transfer performance.
Offering a wide cooling capacity range from 500 kW to 1,200 kW, the unit fully complies with certifications from major international classification societies. It serves as vital equipment for large trawlers, offshore processing vessels, and live fish carriers.
Product Features
Rapid On-Site Installation: Fast complete-unit installation on site, significantly shortening shipbuilding and retrofit cycles. Stepless & Variable Vi Capacity Control: Supports 10%–100% stepless capacity regulation combined with variable volume ratio (Vi) adjustment. Paired with high-precision VFD control, it achieves precise matching between energy output and actual load. Ultra-Efficient Oil Separation: Utilizes a three-stage horizontal oil separator to strictly control discharge oil ratio below 6 PPM, eliminating oil film formation on terminal heat exchanger surfaces right from the source. Optimized Shell & Tube Evaporator: Features an optimized flow path and heat exchange design to achieve high-efficiency thermal performance. Corrosion-Resistant Titanium Tubes: Uses seawater-corrosion-resistant titanium tubes to fundamentally eliminate seawater corrosion, ensuring long-term reliability of heat exchangers under harsh marine environments.
Product Advantages
Ultra-High Cooling Capacity & Rapid Locking Freshness: Delivers broad cooling capacity range from 500 kW to 1,200 kW, locking in peak catch freshness in minimal time to maximize market premium. Precise Chilled Seawater Temperature Control: Using VFD control and stepless capacity regulation, the control system precisely locks the chilled seawater temperature within the target range. Ultra-Durable Design: Heat exchanger tubes utilize seawater-corrosion-resistant materials to eliminate corrosion, ensuring long-term operational reliability. Minimal Operation & Maintenance: Fully automated control system minimizes reliance on highly experienced crew members, reducing manual operation and maintenance costs. Exceptional Structural Stability: Features a robust unit structure that delivers absolute mechanical reliability under high vibration, heavy salt spray, and extreme environments.
Product Specification
| Power Supply (V/Phase/Hz) | 400V/3Ph/50Hz |
| Capacity（ET-6/ CT 32℃）kW | 500 |
| Refrigerant | R717 |
| Motor Power (kW) | 132 |
| Condenser Inlet / Outlet (mm) | DN200 |
| Cooling Water Flow Rate (m3/h) | 132 |
| Evaporator Inlet / Outlet (mm) | DN200 |
| Chilled Seawater Flow Rate (ΔT=1.5 K) m3/h | 306 |
| Dimensions (mm) | 2800x2000x2200 |
| Weight（Approx.) kg | 3850 |
| Power Supply (V/Phase/Hz) | 400V/3Ph/50Hz |
| Capacity（ET-6/ CT 32℃) kW | 800 |
| Refrigerant | R717 |
| Motor Power (kW) | 200 |
| Condenser Inlet / Outlet (mm) | DN250 |
| Cooling Water Flow Rate (m3/h) | 220 |
| Evaporator Inlet / Outlet (mm) | DN250 |
| Chilled Seawater Flow Rate (ΔT=1.5 K) m3/h | 480 |
| Dimensions (mm) | 2900x2300x2300 |
| Weight（Approx.）kg | 4200 |
| Power Supply (V/Phase/Hz) | 400V/3Ph/50Hz |
| Capacity（ET-6/ CT 32℃）(kW) | 1200 |
| Refrigerant | R717 |
| Motor Power (kW) | 250 |
| Condenser Inlet / Outlet (mm) | DN300 |
| Cooling Water Flow Rate (m3/h) | 264 |
| Evaporator Inlet / Outlet (mm) | DN300 |
| Chilled Seawater Flow Rate (ΔT=1.5 K) m3/h | 600 |
| Dimensions (mm) | 2900x2400x2300 |
| Weight（Approx.）(kg) | 4800 |
