New functionality for better control of air flow, temperature and recycling
Machine room ventilation
Demand-controlled, integrated with machine monitoring
Review of the system leads to reduced heating requirements
Adapting pump speed to actual need
Reuse and accumulate the excess energy available during normal operation
Better regulation and new functions lead to electrical energy savings
HVAC is the largest consumer of electricity and heating / cooling on a vessel. The systems to control this is often outdated and ineffective. Great steps have been taken in the development of new functionalities and if these are applied in the right way, the result is increased comfort and huge savings potential.
To maximize energy savings in accommodation ventilation, the systems need to be balanced so that certain cabins won’t be without air. We adjust the air flows in all cabins to achieve the correct balance.
Machine room ventilation
The ventilation for machine rooms is often controlled manually and can therefore vary widely depending on who is the operator in the control room. When the control system is automatized, it leads both to large energy savings and more sufficient operation of the engines.
It is important to keep the steam system in good condition, otherwise it will quickly lead to increased boiler consumption. We review the vital components such as heat exchangers, dumping condenser, control valves, thermostats and steam traps. Furthermore, we are also considering the boiler control equipment, parameter settings and efficiency.
Seawater cooling pumps for machinery are designed to cope with the need for cooling when the seawater temperature is up to 32°C. All the hours that the ship is running on colder water is a great potential for electricity savings. It is also common with bypass regulation which can easily be converted to speed control of the pump instead. We have experience in modernizing a lot of different pumps with very good results. For example: Preheat pumps, reheat pumps, fresh water pumps, seawater pumps, feed water pumps, LT pumps, HT pumps and lubricating oil pumps.
Most ships have no heat recovery from main engines or auxiliary engines cooling water. If this would be implemented it usually covers the ship’s heat requirements at sea and partly in port. If in addition an existing insulated tank would be rebuilt as a heat accumulator tank, the heat requirements could be covered throughout the year by recycled energy.
Ships operating in colder climates often have oversized chillers, resulting in that the compressor is running on low load which is inefficient for a screw or centrifugal compressor. By equipping the chiller with VSD (Variable Speed Drive) the efficiency increases.
By distributing the HVAC cooling water better, eliminating short circuits and optimizing the flow will reduce the total cooling load on board.