Megastar will be a very modern, environmentally friendly ship using several energy saving technologies and burning a clean fuel LNG. She will be equipped with the most modern dual fuel engines for production of electricity. Using natural gas as fuel will reduce noise and exhaust gas emissions. Dual-fuel engines in gas mode produce 25% less CO2, 85% less NOx and practically zero SOx and particles, compared to traditional diesel or heavy-fuel burning engines.
The concept of diesel/gas to electric power will enable the ship’s operators to choose right number of engines that are needed for current weather conditions. It will result in a high energy and environment saving factor, because all the engines can be used at their nominal power, where their efficiency is the highest.
© Wärtsilä© Valmet Marine
The ship’s LNG system will consist of two specially designated bunker stations, double-walled vacuum insulated bunkering lines, big amount of special pipe fittings for safety, two LNG storage tanks with so called ”cold-boxes”, gas distribution system for supplying the main engines and steam boilers.
All the pipelines for LNG and gas will be built from acid-proof stainless steel in order to avoid corrosion and possible leaks during long years of ship’s operation. All the electrical equipment in close vicinity of LNG and gas units will be certified as explosion-proof. For safety reasons the ship will be equipped with a huge number of gas detection sensors.
The vessel will be equipped with two large stainless steel LNG tanks under main deck, with total volume of 600 m³. LNG itself is a liquefied cryogenic gas that must be stored at very low temperatures: –160 °C and under pressure of 4–6 bar. Tanks and LNG handling system will be built in Sweden, at very well-known Linde Group CRYO factory.