Marine Chiller
medium
7 models total
A marine chiller produces chilled water centrally and pumps it to air handling units and cabin fan coils throughout the accommodation, rather than each space running its own refrigerant circuit, the difference that decides whether a ship needs one plant room or dozens of small compressors scattered through the superstructure.
Read more — Marine Chiller explained ▾
What sets a marine chiller apart
A chiller is a central refrigeration package that cools water, or a water-glycol mix, instead of cooling air directly. That chilled water is then piped to air handling units and cabin fan coil units throughout the accommodation and machinery control spaces. The alternative, direct expansion split units in every space, avoids chilled water distribution piping but multiplies the number of compressors, refrigerant circuits and potential leak points across the ship. Larger vessels with substantial accommodation blocks or significant control-room cooling loads generally favour a chiller plant; smaller vessels often stay with DX splits simply because the piping run does not justify itself.
Main components
Compressor
Screw or scroll compressors dominate marine chiller plants in the common tonnage range; screw compressors handle larger loads and tolerate the part-load cycling typical of accommodation cooling better than reciprocating types.
Evaporator and condenser
Shell-and-tube heat exchangers are standard: the evaporator chills the fresh water or glycol loop, the condenser rejects heat to seawater. Seawater-cooled condensers need regular tube cleaning against marine fouling.
Chilled water pumps and distribution
Circulate the chilled water loop to air handling units and fan coils; most plants run duty/standby pump pairs so a single pump failure does not shut down accommodation cooling.
Refrigerant and controls
Modern installations use R-134a, R-407C or R-513A depending on build date and refrigerant phase-out schedules; older tonnage may still run R-22 under grandfathered rules pending conversion.
Selection / Sizing
| Parameter | What it drives |
|---|---|
| Accommodation and control room heat load | Sets total chiller capacity in kW or tons of refrigeration |
| Design ambient and seawater temperature | A plant sized for Baltic service will not hold setpoint in the Arabian Gulf without margin built in |
| Redundancy requirement | Many owners specify two chillers at roughly 60-70 percent capacity each rather than one unit at 100 percent, so a single failure still leaves partial cooling |
| Refrigerant type | Driven by phase-out schedules under the Montreal Protocol and the ship's trading pattern |
Regulations / Class
There is no SOLAS chapter dedicated to accommodation air conditioning, but class rules require adequate ventilation and cooling of control spaces where electronic equipment could otherwise overheat, and the Montreal Protocol governs which refrigerants may be used and phased in or out. MARPOL Annex VI addresses ozone-depleting substances and requires a record of refrigerant charge and any releases in the ship's ozone-depleting substances record book.
Typical faults
- Seawater condenser tubes fouled with marine growth — head pressure climbs, the compressor trips on high pressure, and cooling capacity drops well before the trip actually occurs.
- Refrigerant undercharge from a slow leak — capacity falls gradually, often blamed on ambient conditions rather than the actual leak.
- Chilled water pump seal failure — slow water loss into the bilge that goes unnoticed until the expansion tank runs low and the plant starts short-cycling.
- Duty/standby pump changeover switch left on manual — a pump failure takes down accommodation cooling entirely instead of triggering the standby.
What to look for in a supplier
- Sizing calculation based on your vessel's actual heat load and trading pattern, not a generic tonnage figure.
- Refrigerant choice compatible with your flag state's current Montreal Protocol phase-out schedule.
- Duty/standby configuration as standard on plants serving control rooms, not offered only as an upgrade.
- Spare parts availability for the specific compressor model, since screw compressor rebuilds are not something every port can handle.
Log condenser inlet and outlet seawater temperature at every watch — a slowly climbing differential is the earliest warning of tube fouling, well before the compressor trips on high head pressure.
6 manufacturers · 7 models
Carrier
2
30XA
200-500 kW cooling
· 150.0 kW
· Refrigerant R-134a
· oil‑lubricated screw compressor
Medium
Refrigerant R-134a
Power (kW)
150
Type
Screw Chiller Air-Cooled
Common Failures & Inspection Points
- Screw compressor bearing wear
- Condenser fan motor failure
- Expansion valve sticking
- Refrigerant leak at joints
Service: Air-cooled — suitable for vessels with limited seawater access. Annual refrigerant charge check. Compressor oil analysis every 4000 hrs.
Spare Parts: Ersatzteile über Carrier oder zugelassene Vertriebspartner. Lead time: 2-6 Wochen.
Strengths
- Air‑cooled design eliminates the need for seawater pumps and associated corrosion issues
- Compact footprint suitable for tight engine room spaces
- Screw compressor provides high part‑load efficiency and low vibration
- Integrated oil analysis program (every 4,000 hrs) supports predictive maintenance
- Standardized refrigerant charge check simplifies annual servicing
Weaknesses
- Higher electrical demand in hot ambient conditions compared with water‑cooled chillers
- R‑134a is subject to future phase‑out regulations, potentially requiring retrofit
- Historical condenser fan motor failures require careful inspection and spare parts planning
- Screw compressor bearing wear can become a maintenance focus after extended operation
- Limited maximum cooling capacity (150 kW) may be insufficient for large passenger ships or high‑heat process loads
Typical Vessels:
Cruise shipsFerriesOffshore supply vesselsContainer ships with limited seawater intakeYachts and luxury motor vessels
Decision Guide: Choose if: the vessel has restricted seawater access, requires a compact moderate‑capacity chiller, and values lower corrosion risk. Avoid if: the ship operates in very high ambient temperatures, needs cooling capacity well above 150 kW, or must comply with imminent R‑134a phase‑out without a retrofit plan.
Use Cases: Typically installed in HVAC plant rooms to provide chilled water for air‑conditioning passenger cabins and public spaces, as well as for moderate process cooling on offshore support vessels where seawater cooling loops are impractical.
30HXC
500-2000 kW cooling
· 400.0 kW
· Refrigerant R-134a
· centrifugal water-cooled chiller
Medium
Refrigerant R-134a
Power (kW)
400
Type
Centrifugal Chiller Water-Cooled
Common Failures & Inspection Points
- Impeller blade erosion
- Motor winding insulation breakdown
- Oil pump failure
- Condenser tube fouling
Service: Centrifugal — for large cruise ships and naval vessels. Condenser tube cleaning every 6 months (seawater cooled).
Spare Parts: Ersatzteile über Carrier oder zugelassene Vertriebspartner. Lead time: 2-6 Wochen.
Strengths
- High cooling capacity (~400 kW) suitable for large vessel HVAC loads
- Centrifugal compressor offers good part‑load efficiency
- Robust design for continuous operation on cruise and naval platforms
- Standardized seawater‑cooled condenser simplifies integration with existing ship systems
Weaknesses
- Impeller blade erosion is a known wear issue requiring periodic inspection
- Motor winding insulation breakdown reported in long‑term service
- Oil pump failures can lead to unscheduled downtime
- Condenser tube fouling demands semi‑annual seawater cleaning
- Uses R‑134a, which faces future regulatory phase‑out due to high GWP
Typical Vessels:
Cruise shipNaval vesselLarge passenger ferryOffshore support vessel
Decision Guide: Choose if you need a proven, high‑capacity chiller for large passenger or military ships and can commit to regular condenser cleaning and impeller inspection. Avoid if space is limited, you prefer low‑GWP refrigerants, or you require minimal maintenance intervals.
Use Cases: The 30HXC is typically installed in the central plant of cruise liners and warships to provide chilled water for air‑conditioning, galley cooling, and electronic equipment heat removal, operating continuously on a 24/7 schedule with scheduled seawater condenser cleaning every six months.
Daikin
1
EWAD-C
100-800 kW cooling
· 250.0 kW
· Refrigerant R-410A/R-134a
· scroll compressor marine chiller
Medium
Refrigerant R-410A/R-134a
Power (kW)
250
Type
Chiller Marine
Common Failures & Inspection Points
- Scroll compressor failure
- Plate heat exchanger fouling
- Refrigerant charge loss
- Control board fault
Service: Daikin quality. Plate-type evaporator/condenser for compact installation. Annual leak check required (F-Gas regulation).
Spare Parts: Ersatzteile über Daikin oder zugelassene Vertriebspartner. Lead time: 2-6 Wochen.
Strengths
- Compact plate‑heat‑exchanger layout saves valuable engine‑room space
- Dual refrigerant capability (R‑410A or R‑134a) offers flexibility for regulatory compliance
- High seasonal COP typical of scroll‑compressor designs, reducing fuel consumption
- Integrated control board simplifies installation and monitoring
- Designed for marine vibration and corrosion environments
Weaknesses
- Plate heat exchangers are prone to fouling in high‑salinity or dirty seawater conditions
- Scroll compressors have a documented failure mode that may require specialist spare parts
- Requires annual F‑gas leak checks to stay compliant with IMO regulations, adding maintenance overhead
- Limited scalability – capacity steps are fixed, making it less suitable for vessels needing larger chillers
- Control board faults can be difficult to diagnose without Daikin service support
Typical Vessels:
Passenger ferriesCruise ships (mid‑size)Offshore supply vesselsYachts and luxury motor vesselsContainer or bulk carriers with dedicated crew‑comfort HVAC zones
Decision Guide: Choose if: you need a high‑efficiency, space‑saving chiller for moderate cooling loads and can commit to regular plate‑exchanger cleaning and annual F‑gas leak testing. Avoid if: the vessel operates in heavily fouling seawater environments, requires larger than 250 kW capacity, or prefers screw‑type compressors with longer proven service intervals.
Use Cases: The EWAD-C is typically installed in passenger cabins, crew quarters, and public spaces where a compact yet powerful cooling solution is required. It is common on ferries and mid‑size cruise vessels that must balance HVAC performance with limited engine‑room volume, as well as on offshore support ships that need reliable climate control for crew comfort during extended deployments.
Heinen & Hopman
1
HVAC System (Complete)
50-5000 kW cooling (system)
· Chilled Water / Conditioned Air
· Complete Marine HVAC System
Type
Complete Marine HVAC System
Common Failures & Inspection Points
- Chiller unit failure
- AHU coil corrosion
- Duct insulation degradation
- Control system BMS fault
Service: Turnkey marine HVAC. Heinen & Hopman global service network. Annual system performance review recommended.
Spare Parts: Ersatzteile über Heinen & Hopman oder zugelassene Vertriebspartner. Lead time: 2-6 Wochen.
Strengths
- Fully integrated turnkey package reduces engineering and installation time.
- Robust chiller design proven in harsh marine environments.
- Global after‑sales service network provides spare parts and technical support worldwide.
- Energy‑efficient BMS control enables load‑following operation and reduced fuel consumption.
- Modular layout facilitates installation on new builds as well as retrofits.
Weaknesses
- Higher capital cost compared with basic split HVAC solutions.
- System complexity requires specialized commissioning and regular performance reviews.
- Duct insulation can degrade in salty air if not inspected and maintained regularly.
- Proprietary control software may limit integration with third‑party equipment.
- Large chiller footprint can constrain space on smaller vessels.
Typical Vessels:
Cruise ShipFerryOffshore Supply VesselContainer Ship (crew accommodation)Product TankerLNG Carrier (crew spaces)
Decision Guide: Choose if you need a single‑source, fully integrated HVAC solution with worldwide support and are prepared for the higher upfront cost and scheduled maintenance. Avoid if budget constraints, limited installation space, or a preference for open‑architecture systems sourced from multiple vendors outweigh the benefits.
Use Cases: Deployed on passenger vessels and offshore workboats where crew comfort, equipment reliability, and coordinated climate control across accommodation decks, bridge, and machinery spaces are critical; also common in newbuilds requiring a comprehensive HVAC package.
Johnson Controls (York)
1
YCWM
300-1500 kW cooling
· 350.0 kW
· Refrigerant R-134a
· oil‑lubricated screw compressor
Medium
Refrigerant R-134a
Power (kW)
350
Type
Screw Chiller Water-Cooled
Common Failures & Inspection Points
- Compressor unloader valve failure
- Condenser tube biofouling
- Oil separator element saturation
- Expansion valve hunting
Service: York YCWM widely used on cruise ships. Johnson Controls service network. Annual eddy current test on condenser tubes.
Spare Parts: Ersatzteile über Johnson Controls (York) oder zugelassene Vertriebspartner. Lead time: 2-6 Wochen.
Strengths
- High cooling capacity in a relatively small footprint – suitable for space‑constrained vessels
- Proven global service network from Johnson Controls/York, with routine eddy‑current condenser testing support
- Robust oil‑separator element reduces compressor wear and extends maintenance intervals
- Modular construction allows easy on‑site replacement or capacity scaling
Weaknesses
- Uses R‑134a, a high‑GWP refrigerant that may face future regulatory restrictions
- Historical issues with compressor unloader valve failures requiring periodic inspection
- Condenser tubes prone to bio‑fouling; requires annual eddy‑current testing and cleaning
- Expansion‑valve hunting can cause temperature swing if control loop not properly tuned
Typical Vessels:
Cruise shipPassenger ferryOffshore support vessel (OSV)Yacht / luxury linerNaval auxiliary ship
Certifications:
IMO Type ApprovalDNV Class approvalABS classification
Decision Guide: Choose if you need a high‑capacity, compact water‑cooled chiller with an established service network and are comfortable managing R‑134a compliance. Avoid if low‑GWP refrigerants are mandatory or if you prefer a system with minimal condenser fouling maintenance.
Use Cases: Typically installed in the HVAC plant of cruise ships and ferries to supply cabin air‑conditioning, galley refrigeration, and deck‑cooling loops; also used on offshore vessels for crew comfort and equipment cooling where space and weight are at a premium.
Novenco Marine & Offshore
1
HVAC System (Complete)
50-3000 kW cooling (system)
· Chilled Water / Conditioned Air
· Marine vapor‑compression chiller
Type
Complete Marine HVAC System
Common Failures & Inspection Points
- Chiller refrigerant leak
- AHU damper actuator failure
- FCU motor burnout
- BMS communication loss
Service: Novenco HVAC for naval and offshore. Specialized in harsh environments. Annual commissioning report.
Spare Parts: Ersatzteile über Novenco Marine & Offshore oder zugelassene Vertriebspartner. Lead time: 2-6 Wochen.
Strengths
- Designed for harsh offshore conditions with corrosion‑resistant components
- Integrated BMS interface for centralized monitoring and control
- Modular layout allows installation on a wide range of vessel sizes
- Annual commissioning report supports proactive maintenance planning
Weaknesses
- Reported susceptibility to refrigerant leaks in the chiller circuit if not regularly inspected
- Actuator failures on AHU dampers have been noted, requiring spare parts stocking
- FCU motor burnout can occur under prolonged overload without proper load balancing
- BMS communication loss may arise if wiring standards are not strictly followed
Typical Vessels:
Naval frigatesOffshore supply vessels (OSV)Platform service vesselsMultipurpose support ships
Decision Guide: Choose if: you need a robust, fully integrated HVAC solution for naval or offshore vessels operating in corrosive, high‑humidity environments and you have the capability to implement regular BMS checks. Avoid if: budget constraints limit spare‑part provisioning for known failure modes or if vessel space/weight limits preclude a modular chiller package.
Use Cases: The system is commonly installed on naval warships and offshore support vessels where continuous climate control is critical for crew comfort, equipment reliability, and mission readiness. It is also used on platform supply ships that service oil‑and‑gas rigs, providing conditioned air to both living quarters and sensitive electronic compartments.
Trane
1
CGAM
100-500 kW cooling
· 140.0 kW
· Refrigerant R-134a
· screw compressor
Medium
Refrigerant R-134a
Power (kW)
140
Type
Screw Chiller Air-Cooled Marine
Common Failures & Inspection Points
- Screw compressor discharge valve leak
- Condenser coil corrosion from salt air
- Expansion valve malfunction
Service: Trane marine chiller. Coil coating essential for marine environment. Annual refrigerant charge verification.
Spare Parts: Ersatzteile über Trane oder zugelassene Vertriebspartner. Lead time: 2-6 Wochen.
Strengths
- Air‑cooled design eliminates reliance on seawater piping and reduces fouling risk.
- Compact screw compressor offers high capacity in a relatively small footprint.
- Lower vibration and noise compared with reciprocating units, beneficial for accommodation spaces.
- Integrated control system allows precise temperature regulation and easy monitoring.
- Coil coating option mitigates corrosion from the marine salt environment.
Weaknesses
- Air‑cooled efficiency drops in high ambient temperatures, limiting performance in tropical regions.
- R‑134a has a higher global warming potential than newer low‑GWP refrigerants.
- Known field failures include discharge valve leaks and expansion valve malfunctions.
- Corrosion of the condenser coil can occur if protective coating is omitted or damaged.
Typical Vessels:
Passenger ferryCruise ship (accommodation zones)Offshore supply vesselRo‑Ro cargo vesselSmall to medium tankers
Decision Guide: Choose if you need a moderate‑capacity, air‑cooled chiller for vessels without abundant seawater cooling and where space/weight savings are important. Avoid on large ships operating in hot tropical climates or when the latest low‑GWP refrigerants are required by regulation.
Use Cases: Commonly installed to service crew quarters, galley areas, medical bays, and other HVAC zones on passenger‑focused or offshore support vessels where a reliable, compact cooling solution is needed without seawater heat exchangers.