We established “Marine Energy Saving Division” (MESD) as the headquarters for our management and guidance of energy efficiency in order to enthusiastically tackle energy saving navigation since April 2013.
By establishing MESD, our activities for environmental preservation will be more advanced than before.
The amount of fuel consumed for transporting a ton of cargo over a distance of one kilometer is used as an index of energy efficiency. The smaller the value, the more energy-efficient is the transport. Ships are suited for transporting large volumes of cargo with on-board large fuel-efficient diesel engines. Therefore, ocean transport is the most energy-efficient among many modes of transport and is also effective for reducing CO2 emissions. To allow this efficient mode of transport to continue to exist in the future, we are committed to continuing to improve our ships' energy efficiency and to reviewing our operating systems to maximize the efficiency of our entire fleet.
The fuel combusted in the engine and converted into energy for maneuvering the ship is discharged into the atmosphere as exhaust gas. The thermal energy of this high-temperature gas is collected by the exhaust gas economizer to generate hot, high-pressure steam. The steam is sent to turbo generators driven by the steam turbine and used to generate electricity for use on board, saving fuel for generators. Thus, the system uses energy of the exhaust gas, which would normally be wasted, to generate electricity. This improves a ship' s energy efficiency, or the transport's energy efficiency, enabling reduction of CO2 emission.
Exhaust Gas Economizer and Turbo Generator
The rudder that maintains and changes the ship's direction is positioned afterward of the propeller and is continually subject to the water stream it generates. A spherical bulge and horizontal fins attached to the rudder convert the propeller's water stream into propulsion power. The extra power permits lower fuel consumption and reduces CO2 emissions, while maintaining the service speed of the ship.
Structure of Energy-Saving Appendages
A ship is navigated to the destination port by following the course specified in the voyage plan. However, because a ship is subject to disturbances such as wind, waves, and ocean current, it needs to be steered frequently to stay on course. An autopilot is a system that automatically steers the ship. It is used in areas where multiple ships do not converge, such as in mid-ocean. The latest type of autopilot is capable of learning the degree and duration of those disturbances and makes use of the data for the next steerage, thereby minimizing unnecessary operations. This reduces fuel consumption by about 1% compared with conventional units. We are striving to reduce the amount of CO2 emissions by continuing to install this state-of-the-art system in our ships.
Steering stand with autopilot
Crew members' onboard accommodations and the bridge for navigational watch are air-conditioned. However, ships are made of metal, which readily transfers heat, and walls and ceilings become hot or cold respectively from solar heat or outside temperature. This reduces the cooling/heating efficiency of air conditioners. We therefore use heat shield paint for outer plates of the accommodations and bridges to improve air conditioning efficiency, and this reduces the power needed for cooling and the amount of steam used for heating, which in turn means lower CO2 emissions.
Heat shield paint is highly effective for a car carrier because the accommodations and upper part of the bridge are wide.
"K" Line has introduced energy-saving hybrid transfer cranes※ at its own container terminals in Japan. These cranes, which are used at terminals to sort containers by destination, convert the energy generated when hoisted containers are set down in a preset location into electricity that is then reused as electric power. This cuts fuel consumption by about 40-50% compared to conventional cranes and greatly reduces noise.
※ Transfer crane: A self-propelled crane used for moving containers at a container terminal
Hybrid transfer crane
*1 transfer crane : A transfer crane is a self-propelled crane used for moving containers at a container terminal.
"K" Line America, Inc. (KAM) has affirmed its environmental commitment by purchasing renewable energy credits from Renewable Choice Energy since 2008, to offset office electricity consumption. KAM offset 60% of office electricity in 2008 and 80% in 2009. In 2010, KAM expanded its environmental commitment to a 100% offset level. This renewal also allowed it to remain a U.S. Environmental Protection Agency (EPA) Green Power Partner.
"BANGKOK COLD STORAGE SERVICE, LTD," which operates at Bangkok, Thailand, installed solar panels on roof of 2nd warehouse in 2014. Output of solar power system is up to 112.5kwh, and total output in 2015 was 170mwh. This energy is 14.8% of the annual electricity consumption at this warehouse and contributes to energy efficiency. "BANGKOK COLD STORAGE SERVICE, LTD" has operated in accordance with environmental preservation since obtaining verification of ISO14001 from a third party in 2009 as well.
2nd warehouse of "BANGKOK COLD STORAGE SERVICE
Solar panels on the roof of 2nd warehouse
We have established “business continuity plan” in the event of natural disasters and second disasters that includes plans for the continuation of important duties by having duties transferred to another internal or foreign location.
In addition, we accumulate backup data at some distant place so that electronic data is not lost in the event of a disaster.
Furthermore, we provide weather conditions and stormy weather information on each route to our navigating ships, and also plan for minimization of damage by bad weather.