Marine Greentech

Sustainable Engineering Through HSM


Exhaust gas cleaning systems (EGCS), also known as scrubbers, are increasingly being utilized by ships to comply with the 2020 sulphur cap. A scrubber sprays seawater or fresh water mixed with a caustic chemical into the exhaust gas stream in multiple stages. The main pollutant, sulphur dioxide, reacts with the alkaline water to form sulphuric acid. In open-loop systems, the resulting wash water is discharged back into the sea.

In areas where open-loop scrubbing is not allowed, ships can opt for closed-loop systems and store the collected sludge on board for disposal at a suitable in-port facility.

Hybrid scrubber systems offer more flexibility by being able to operate in closed-loop or open-loop mode. A multi-inlet scrubber can handle exhaust gas from multiple engines, while a single-inlet scrubber is designed for one engine. Careful consideration of all options is crucial for a ship’s economic sustainability based on its specific needs and trading pattern.

Our dedication lies in securing a sustainable energy future amidst rising global demand.

HSM’s Marine partnership with a leading player in the market offers a versatile option for ship operators through its CCS modular design. These units can be easily integrated with an existing exhaust gas cleaning system or scrubber, making them suitable for both current and future vessels. Moreover, if your ship utilizes low sulphur fuel oil, the CCS system can function independently. To cater to your specific operational requirements, the scrubber is available in both open-loop and hybrid variations.

The liquid carbon dioxide can be transferred to quayside tank trucks, CO2 tank barges, or a permanent onshore CO2 reception facility for offloading at the port. The ideal system configuration and rate of CO2 recovery are determined by various factors such as the vessel’s trade route, onboard storage capacity, and desired discharge points.

A refined innovation that can cut fuel consumption and emissions

“Reduce your fuel consumption and emissions with air lubrication technology.”

We are excited to announce our partnership with a major industry leader in Air lubrication services. By implementing Air lubrication, we can significantly decrease the frictional resistance of a ship’s hull through the formation of a layer of microbubbles on the entire flat bottom of the vessel’s hull. This innovative technology has the potential to lower fuel consumption and greenhouse gas emissions by as much as 10%. It is a versatile solution that can be applied to various types of ships such as LNG carriers, RoPax/RoRo vessels, bulkers, container ships, tankers, and cruise ships.

Key Benefits

  • Can cut fuel consumption and associated emissions by up to 10%
  • Will work in all sea and weather conditions
  • Will not restrict or negatively impact the vessel’s normal operational profile
  • Improves operational flexibility by trading fuel savings for increased vessel speed as needed
  • For newbuilds, improves the Energy Efficiency Design Index (EEDI)
  • For existing vessels, improves the Energy Efficiency Existing Ship Index (EEXI)

Typical Air Lubrication System Components

  • Air release units: located at the leading edge on the bottom of the hull, within the bottom. The number of necessary air release units depends on the vessel size.
  • Compressors, connected to the air release units
  • Piping connects the compressors and air release units. 
  • Non-return valves will passively regulate the pressure.
  • A control system is also needed. It uses speed and air flow data to regulate the compressors. The system must also be connected to the vessel’s automation system to enable monitoring and alarms.

Unlock the power of fuel conversion and experience unparalleled fuel flexibility for your ship

We have teamed up with a key player in the market to access cutting-edge technology that enables us to utilize upcoming fuels now, while continuously working on advancements for other fuel options. Various retrofit options are already available for both 4-stroke and 2-stroke engines.

2-stroke Future Fuels Conversion Benefits

  • Reduced emissions and GHG footprint
  • Long-term CII compliance and extended operational lifetime
  • Fuel flexibility futureproofing the investment
  • Fast and straightforward retrofitting concept 

4-stroke LNG Conversion Benefits

  • Reduction of emissions, environmental fees, and fuel costs
  • Compliance with regulations
  • Increased fuel flexibility with dual-fuel engines

4-stroke Methanol Conversion

  • Reduction of emissions
  • Compliance with regulations
  • Greener image
  • Increased fuel flexibility