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六十年代中期已出现运输压缩天然气的海船。此后不久,人们就确信不放掉汽化气而利用其能量使之转换为推进功率,从经济上看是合理的。值得注意的是Forster wheeler 工厂制造了第一台双燃料的ESD(ExternalSuperheater D)型锅炉。该型锅炉在汽轮机船上燃烧汽化气,且符合验船船级社所提的要求。在研制该型锅炉时非常注意安全问题。被压缩的天然气(甲烷)转装到船上由船壳构成的绝热的大容器中,温度约为-160℃的压缩气体在绝热容器中摇晃,容器绝热的要求是,汽化气一昼夜不超过
Seagoing ships transporting compressed natural gas have appeared in the mid-1960s. Shortly thereafter, it was economically justified to convince people not to let go of their gas and to use their energy to convert it to propulsion. It is noteworthy that the Forster wheeler plant built the first external dual-fuel ESD (External Superheater D) boiler. The boiler burned in the gas turbine steam gas, and in accordance with the requirements of survey classification society. In the development of this type of boiler, pay great attention to safety issues. The compressed natural gas (methane) is converted into an adiabatic large vessel consisting of a hull on board, and the compressed gas with a temperature of about -160 ° C is shaken in a heat-insulating vessel. The heat-insulating requirement of the vessel is that the vaporized gas does not exceed