DESMI - Model OptiSave -Optimizing Pump Speed to Current Conditions
With DESMI OptiSave it is simple - save 80,000 USD by having an intelligent control of your cooling water system. The cooling water system on-board vessels is designed for operation in 32°C seawater and 100% engine load and the auxiliary equipment runs as if this condition is permanent. However, the seawater temperatures of the oceans are not 32°C all over the world. Actually, there are only few hotspots where these conditions are present. This means that the cooling system in 95% of operation time are absorbing too much energy.
By installing DESMI OptiSave energy saving system you will be able to regulate the energy consumption according to actual cooling demand and thereby save fuel for your generating sets.
You will achieve a 50% reduction in the energy consumption for your cooling water pumps already at 28°C. The power consumption of the pump will be reduced 4 times compared to the speed reduction of the pump.
Some of the many advantages - just to name a few:
- Energy management
- Energy efficiency
- Cascade control of pumps
- Variable speed adjusted pumps
- Power savings
- Full reduncancy (pumps and frequency inverters)
- Reduction of mechanical service costs
- Reduction of operating costs
- Longer life time of pumps
We have saved 52,000 kWh - and on board the vessel it costs 0,2 kilogram fuel to produce 1 kWh. The fuel savings will thereby accumulate to 10,3 tons of fuel. With today’s bunker price of 590 USD / ton fuel the savings for the described trip from Shanghai to Denmark will reach 6.130 USD for a 4 weeks trip.
Saving calculation:
52,000 kWh
x
0.2 kilogram fuel
= 10.3 tons fuel
Saving calculation:
590$
x
10.3 tons
= 6130 $ - in 4 weeks
Savings:
676,000 kWh > fuel > 80,000 $
Based on actual data logging the proven savings of the DESMI OptiSave system will reach an annually savings of amazing 80.000 USD
You can save millions of tons of fuel oil using OptiSave
OptiSave helps ship owners and designers to meet the requirement for reduction of C02 stipulated in IMO MEPC 62 rules. OptiSave is designed to be integrated in newbuild and retrofit applications and can be fully integrated into the overall Control System.
IMO has specified that the world fleet has to reduce CO2 emissions by 180 million tons by 2020. This is equal to savings on an average of 285 tons of CO2 or the same as 110 tons of fuel oil per vessel. If you install OptiSave in your ships’ seawater system you will save approx. 70 tons of fuel oil per year (average value per vessel) which corresponds to 64% of the CO2 emission stipulated by IMO. If you install OptiSave in the fresh-water system as well, the savings will be up to 140 tons of fuel oil, corresponding to 128% (average per vessel).
Finally, if you also install the OptiSave in your engine room fan system, the savings will be around 210 tons of fuel oil, in total 192% of the CO2 emission stipulated by IMO.