The logistical properties of LNG ship equipment are mainly reflected in its particularity, complexity and high technical requirements.
Speciality
LNG ship equipment needs to work at extremely low temperatures (-163 degrees Celsius), so these equipment must have special materials and designs. For example, the cargo tank needs to adopt a double-hull structure, and the inner hull is the load-bearing shell of the cargo tank. This design not only improves the volume utilization rate, but also reduces the structural weight. In addition, the cargo maintenance system of the LNG ship is used to enclose the cargo and prevent it from hitting the bulkhead due to shaking, ensuring safety during transportation.
Complexity
The design and construction of LNG ships involve many complex technical challenges. First, it is necessary to select materials that are suitable for low-temperature environments. These materials must not only be able to withstand extremely low temperatures, but also have good thermal insulation properties. Secondly, the volatile and flammable properties of LNG require strict safety measures on board, including multiple barriers and monitoring systems to prevent leaks and accidents. Finally, LNG ships are also equipped with advanced propulsion systems and gas supply systems, which need to be customized according to the type of ship and navigation requirements, and may adopt various forms such as diesel engine + reliquefaction propulsion system, dual-fuel electric propulsion system or natural gas fuel gas engine direct propulsion system.
High technical requirements
The design and construction of LNG ships require highly specialized technology and knowledge. For example, LNG ships generally use steam turbine power units, which use LNG as fuel to generate steam, which in turn drives steam turbines and generator sets. Although the overall thermal efficiency of this system is low, its technology is mature and reliable, with low daily maintenance costs, and it can use the evaporated gas generated during cargo transportation as propulsion fuel. In addition, the construction of LNG ships also needs to consider special requirements such as cargo loading and unloading operations and emergency rescue, which increase its technical complexity and construction difficulty.