Marine Calorifier Tank

The ZRG Series Steam Heating Hot Water Tank is a high-performance marine calorifier specifically engineered to provide reliable hot fresh water for crew accommodations on ships, offshore platforms, and various marine vessels. Utilizing steam as the primary energy source, this energy-efficient heating system is designed for seamless integration into vessel freshwater systems where steam is readily available from auxiliary boilers or waste heat recovery systems.

Operating with precision-engineered steam coils, the ZRG Series efficiently transfers heat from steam to fresh water, delivering a consistent supply of hot water at 65°C outlet temperature (from 15°C inlet) for showers, washing, galley operations, and sanitation facilities. With robust construction and adherence to international marine standards, these calorifiers ensure dependable performance throughout the vessel’s service life.

Clean, Efficient, and Versatile Operation

Steam heating offers distinct advantages in marine applications:

Clean Operation: No combustion byproducts or emissions within the accommodation areas.
High Efficiency: Direct heat transfer from steam to water maximizes energy utilization.
Proven Technology: Simple, reliable design with minimal moving parts.
Space-Saving Design: No bulky main ductwork, complex control valves, or exhaust stacks required—ideal for engine rooms with limited space.
Integration Ready: Designed to work seamlessly with existing shipboard steam systems.

Built for Marine Excellence

Each ZRG Series calorifier is constructed with marine-grade materials and precision-engineered components to withstand the harsh realities of the marine environment—constant vibration, high humidity, corrosive saltwater atmospheres, and variable operating conditions. With working pressure of 0.6 MPa and design pressure of 0.7 MPa, these tanks provide robust, long-lasting service.

Key Features & Benefits

✅ Steam-Powered Heating: Utilizes available shipboard steam (0.3 MPa) for efficient, reliable hot water generation—ideal for vessels with auxiliary boilers or waste heat recovery systems.
✅ High-Efficiency Heat Transfer: Engineered steam coils maximize heat exchange, delivering heated water capacities from 275 kg/h to 3250 kg/h depending on model.
✅ Robust Pressure Ratings:
- Working Pressure: 0.6 MPa
- Design Pressure: 0.7 MPa
- Steam Pressure: 0.3 MPa
✅ Consistent Temperature Output: Maintains 65°C outlet temperature from 15°C inlet for comfortable, reliable hot water supply.
✅ Wide Capacity Range: Available in capacities from 0.12 m³ to 1.0 m³ to suit vessels of all sizes—from small workboats to large passenger ships.
✅ Minimal Maintenance: Simple, robust design with no electric heating elements to replace or maintain.
✅ Space-Efficient Design: No bulky ductwork, main control valves, or exhaust stacks required—ideal for engine rooms with limited space.
✅ Customization Available: OEM and custom services accepted to meet specific vessel requirements.
✅ Global Applicability: Suitable for all vessel types and offshore installations worldwide.

Technical Specifications

Main Parameters

Model	ZRG-0.12	ZRG-0.2	ZRG-0.3	ZRG-0.5	ZRG-1.0
Capacity (m³)	0.12	0.2	0.3	0.5	1.0
Working Pressure (MPa)	0.6	0.6	0.6	0.6	0.6
Design Pressure (MPa)	0.7	0.7	0.7	0.7	0.7
Steam Pressure (MPa)	0.3	0.3	0.3	0.3	0.3
Water Inlet Temperature (°C)	15	15	15	15	15
Water Outlet Temperature (°C)	65	65	65	65	65
Steam Consumption (kg/h)	27.5	45	75	120	325
Heated Water Capacity (kg/h)	275	450	750	1200	3250
Steam Heating Surface Area (m²)	0.24	0.38	0.6	1.0	2.6
Weight (kg)	155	205	222	286	343

Product Specifications

Parameter	Detail
Product Name	Steam Heating Hot Water Tank / Marine Calorifier
Type	ZRG Series
Application	Fresh Water Heating for Crew Accommodations
Warranty	1 Year
Working Pressure	0.6 MPa
Design Pressure	0.7 MPa
Steam Pressure	0.3 MPa
OEM Services	Acceptable
Customization	Acceptable (dimensions, connections, configurations)
MOQ	1 Set

Operating Principle

The ZRG Series Steam Heating Hot Water Tank operates on a simple, reliable principle:

Steam Supply: Steam at 0.3 MPa enters the calorifier through the steam inlet and flows through the internal heating coil.
Heat Transfer: As steam passes through the coil, its heat is transferred to the surrounding fresh water in the tank.
Condensation: The steam condenses as it releases heat, and condensate is discharged through the steam trap.
Hot Water Storage: Heated fresh water (65°C) is stored in the tank, ready for distribution to accommodation areas.
Automatic Control: Temperature control valves regulate steam flow to maintain consistent outlet temperature.
Continuous Operation: As hot water is drawn, cold water enters from the freshwater system, and the heating process continues automatically.

Applications

The ZRG Series Steam Heating Hot Water Tank is essential for providing domestic hot water on a wide range of vessels with available steam:

Commercial Vessels: Cargo ships, container vessels, tankers, bulk carriers with auxiliary boilers
Offshore Platforms: Oil rigs, FPSOs, accommodation barges, drilling platforms
Passenger Vessels: Ferries, cruise ships, passenger vessels with steam systems
Naval Vessels: Frigates, destroyers, support ships, auxiliary vessels
Workboats & Tugs: Vessels with waste heat recovery or auxiliary boilers
Fishing Vessels: Larger commercial fishing vessels with steam capabilities
Tankers: Steam-powered tankers with ample steam availability
LNG/LPG Carriers: Vessels with steam turbine or boiler systems

Frequently Asked Questions (FAQs)

Q1: What is the difference between a steam-heated calorifier (ZRG) and an electric calorifier (DRG)?
A: The fundamental difference is the heating method:

ZRG Series (Steam-Heated): Uses steam coils to transfer heat from shipboard steam to fresh water. Ideal for vessels with auxiliary boilers, waste heat recovery systems, or steam-powered plants. More energy-efficient when steam is already available.
DRG Series (Electric): Uses electric heating elements. Suitable for vessels without steam capability or as backup systems.
The ZRG series offers lower electrical load on the ship’s generators and can utilize “free” heat from waste heat recovery systems, making it more energy-efficient in appropriate applications.

Q2: How do I select the correct ZRG model for my vessel?
A: Model selection depends on your vessel’s peak hot water demand and crew size:

ZRG-0.12 (275 kg/h): Small vessels, workboats with 5-10 crew
ZRG-0.2 (450 kg/h): Medium vessels with 10-20 crew
ZRG-0.3 (750 kg/h): Vessels with 20-30 crew
ZRG-0.5 (1200 kg/h): Vessels with 30-40 crew or higher demand
ZRG-1.0 (3250 kg/h): Large vessels with 40-60+ crew, passenger vessels, extensive galley/laundry facilities
Consider both storage capacity (for peak demand events) and heating capacity (recovery rate). Our technical team can assist with detailed calculations.

Q3: What is steam consumption, and how does it relate to heated water output?
A: Steam consumption is the amount of steam (in kg/h) required to produce the corresponding heated water output. The relationship is based on the latent heat of vaporization of steam:

For every 1 kg of steam condensed, approximately 10 kg of water can be heated from 15°C to 65°C.
This 1:10 ratio is reflected in our specifications:
ZRG-0.12: 27.5 kg/h steam → 275 kg/h hot water
ZRG-1.0: 325 kg/h steam → 3250 kg/h hot water
This efficiency makes steam heating highly effective for marine applications.

Q4: What does “steam heating surface area” mean, and why is it important?
A: Steam heating surface area is the total external surface area of the steam coils inside the tank that is in contact with the water being heated. This parameter is critical because:

Heat Transfer Capacity: Larger surface area allows more heat to be transferred from steam to water.
Efficiency: Sufficient surface area ensures the tank can achieve its rated heated water output.
Sizing: The heating surface area is directly proportional to the tank’s heating capacity—larger tanks require more coil surface area to heat water efficiently.
Our ZRG Series is engineered with optimally sized heating surfaces for each capacity (0.24 m² to 2.6 m²).

Q5: What maintenance does a steam-heated calorifier require?
A: Regular maintenance ensures optimal performance and longevity:

Monthly: Inspect for steam leaks at connections, check condensate drain operation.
Quarterly: Test safety valve operation, inspect insulation condition.
Annually: Clean steam strainer, inspect steam traps for proper operation, check for scale buildup on coils (if water quality is poor).
Every 2-3 Years: Internal inspection of steam coils for corrosion or erosion, pressure test if required.
Continuous: Monitor condensate return for signs of oil contamination (indicates coil leakage).

Q6: Can the ZRG Series be customized for specific vessel requirements?
A: Yes, absolutely. We offer comprehensive customization services:

OEM Manufacturing: We can manufacture to your exact specifications.
Custom Dimensions: Tank size and shape can be adjusted to fit specific space constraints.
Connection Configurations: Inlet/outlet positions and sizes can be customized.
Pressure Ratings: Alternative pressure ratings available upon request.
Material Options: Stainless steel construction available for specialized applications.
Insulation: Enhanced insulation options for extreme environments.

Attention please: The description was copied from different cooperating manufacturers. The description may be different with the goods, please check with us when order.

Tag: Our other products
Click here to contact us via whatsapp