Method for determining heat inputs and drainless storage duration of liquefied natural gas in a cryogenic tank

Ensuring safe and long-term storage of liquefied natural gas (LNG) is essential for improving the environmental and cost effectiveness of LNG-based power plants. A method for calculating heat fluxes from the environment to the working fluid in a cryogenic tank is proposed, taking into account the heat inputs through thermal bridges, including pipelines and supports of the internal vessel. In accordance with the calculations, performed for a tank with a volume of 6.8 m 3 , the average time of the LNG drainless storage in various modes of operation and refueling equals 6–8 days at an average heat flux of 396 W.