01
Onboard refrigeration
Quick-freezing and chilled-water plants for long-haul fishing vessels, including vessels operating from Zhejiang and Fuzhou.
Seawater conditions · Vessel movement · Machinery space
Jinduo · Seafood & Marine Refrigeration
Seafood Processing & Marine Refrigeration
Onboard freezing and cold storage, planned together.
Jinduo manufactures refrigeration equipment for fishing-vessel projects. Freezing duty, fish-hold temperatures and available onboard space guide the equipment package.
Cold spaces, connected
From the freezing room to the fish hold.
The catch follows a cold chain onboard. Refrigeration spaces, machinery and seawater connections need to work within the vessel’s arrangement.
- 01Quick-freezing rooms
- Freeze the catch in batches with refrigeration arranged around the product and loading method.
- 02Refrigerated fish holds
- Maintain the required storage temperature after freezing, with coolers and coils suited to the hold.
- 03Refrigeration machinery
- Place compressor packages and pressure components around access, pipe routes and machinery space.
- 04Seawater cooling
- Reject refrigeration heat through seawater-cooled condensers and the vessel’s cooling-water circuit.
- 05Monitoring & controls
- Coordinate refrigeration operation, temperature monitoring, alarms and vessel interfaces.
Understand the refrigeration system
The equipment behind the cooling duty.
Follow the refrigerant from compression and heat rejection to the freezing rooms and fish holds. The equipment arrangement connects each duty to a coordinated refrigeration plant.
01–03
Refrigeration plant
- 01Screw-compressor package
- Compresses the returning refrigerant vapour. Package selection follows the freezing and storage duties.
- 02Seawater condenser
- Transfers heat from the refrigerant to seawater through a shell-and-tube heat exchanger.
- 03Receiver & filtration
- Provides liquid-refrigerant storage and filtration before distribution to the cooling spaces.
04 / 06
Refrigerant distribution
- 04Liquid distribution
- Valves and expansion devices regulate refrigerant supply to the evaporators.
- 06Suction return & separation
- Returns refrigerant vapour to the compressor, with separation arranged for the selected system.
05 / 07
Cooling & monitoring
- 05Freezing racks & hold coolers
- Remove heat from the product and storage spaces using the agreed racks, air coolers and coils.
- 07PLC monitoring
- Monitors temperatures and refrigeration status, with alarms and agreed vessel interfaces.
Project design reference
A 68 m fishing-vessel refrigeration design.
A project design reference brings the freezing and storage requirements together. The refrigeration equipment is selected around both duties.
40t / batch
Combined design freezing load
R507A in this project design
| Design parameter | Project reference |
|---|---|
| Quick-freezing rooms | 8 rooms |
| Load per freezing room | 5 t per batch |
| Combined freezing load | 40 t per batch |
| Freezing-room design temperature | −35°C |
| Refrigerated fish holds | 3 holds · approximately 970 m³ total |
| Fish-hold design temperature | −25°C |
Design freezing cycle: 8–10 hours, with product entering at no more than 32°C and a target product-core temperature of −18°C.
Project design parameters · Final equipment and layout follow the confirmed technical proposal.
Seafood refrigeration experience
At sea. On shore.
Jinduo’s seafood refrigeration work covers onboard quick-freezing and chilled-water plants, alongside glycol systems for land-based processing.
100+
More than 100 vessels equipped over 20 years.
Company experience02
Land-based seafood processing
Custom glycol-based quick-freezing systems planned around the product, process temperatures and production schedule.
Product duty · Glycol circuit · Process interfaces
Let’s define your refrigeration system
Start with the catch. Define the cooling duty.
Share your vessel or processing requirement. We’ll help define the refrigeration equipment, arrangement and project interfaces.
Plan Your Refrigeration SystemInformation for system selection
- Vessel or facility
- Vessel type or processing site, available equipment space and layout.
- Freezing duty
- Seafood product, load per batch, incoming temperature, target core temperature and required freezing time.
- Storage duty
- Fish-hold volume, target storage temperature and operating schedule.
- Design conditions
- Seawater and ambient temperatures, corrosion exposure and cooling-water arrangement.
- Utilities & interfaces
- Electrical supply, pipe routes, control interfaces and required class or documentation scope.