Classification of Marine Air Conditioning Systems-Taizhou Duruibao Marine Equipments Co., Ltd.

Classification of Marine Air Conditioning Systems

2025-12-16 2

Marine air conditioning systems, categorised as centralised or semi-centralised units, primarily comprise the following configurations based on their regulation methods: centralised single-duct systems, zone reheat single-duct systems, terminal recirculation single-duct systems, and dual-duct systems. When selecting a system configuration, consideration must be given to the load variations of the air-conditioned compartments requiring regulation, noise requirements, and spatial constraints of the ductwork system. 1. Centralised Single-Duct System The centralised single-duct system is a commonly employed marine air conditioning configuration suitable for small to medium-sized vessels. This system connects all compartments via a single main duct. A central air conditioning unit provides the heating and cooling source, distributing refrigerant to each compartment. Air is then treated through air handling units to regulate the internal environment of the vessel.
2. Zone-reheat single-duct system
The zone reheat single-duct system is a marine air conditioning system that divides air handling into separate cooling and heating zones, suitable for small to medium-sized vessels. This system connects all compartments via a single main duct. A central air conditioning unit provides the cooling and heating source, distributing refrigerant to each compartment. Air is then processed through air handling units, dividing it into separate cooling and heating zones to regulate the vessel's internal climate.
3. Terminal Recirculation Single-Duct System
The terminal recirculation single-duct system is a marine air conditioning system that performs air treatment at the terminal end of the main duct, suitable for small to medium-sized vessels. This system connects all compartments via a single main duct. A central air conditioning unit provides the cooling and heating source, distributing refrigerant to each compartment. Air is treated by the air handling unit, with a further treatment stage at the main duct's terminal point to achieve internal climate control. 4. Dual-Duct System
The dual-duct system is a marine air conditioning system that separates air into cooling and heating ducts, suitable for large vessels. This system connects all compartments via two ducts: one supplying cooled air and the other supplying heated air, thereby regulating the vessel's internal climate.

Key Points for the Use of Marine Fans

Marine fans are a new type of ventilation equipment manufactured from corrosion-resistant fibreglass reinforced plastic (FRP), classified as axial flow fans. Utilising a corrosion-resistant FRP outer casing, their operating principle employs negative pressure ventilation to achieve air circulation, ventilation, and cooling. 1. Starting the fan at full voltage or reduced voltage Marine fans can be started at either full voltage or reduced voltage. However, certain precautions apply. Specifically: - When starting at full voltage, the starting current should be 5-7 times the rated current. - When starting at reduced voltage, the starting torque is proportional to the square of the voltage. 2. Requirements for trial operation runs Are there requirements for the number of trial operation runs?

View details

Marine Air Conditioning Condensate Drain Pan

The marine air conditioning condensate collection tray comprises a main collection tray body, a collection tray surround, and a filter mesh fixing module. The condensate collection tray features a structurally sound design with high practicality. During operation, the perimeter of the tray body incorporates a channel structure, with the bottom edges lower than the centre to ensure condensate first flows into the channels. The filter screen serves a dual purpose: it filters debris to prevent blockage of the outlet; Additionally, it mitigates the kinetic energy of condensate overflow during vessel motion. Both the longitudinal and transverse trapezoidal grooves feature a narrower base and wider top, thereby reducing water accumulation while facilitating easy cleaning of debris within the tray.

View details

Principles of Marine Air Conditioning Systems

Marine air conditioning units must not only withstand harsh maritime conditions such as salt spray, mould and humidity, but also serve as vital equipment ensuring the normal operation of personnel and machinery. Their performance directly impacts crew working conditions, making reliability and maintainability paramount. The refrigeration unit employs a welded structure for structural integrity, with insulation comprising glass wool and galvanised perforated sound-absorbing panels. Key refrigeration components are designed for stability and reliability. The unit's return air valve utilises a turbine-type regulating valve with graduated display for convenient and flexible adjustment. Structural Design: The compressor and condenser are stacked vertically, arranged in a front-to-back configuration, with the compressor positioned at the rear.

View details