Performance evaluation method for liquefied natural gas air temperature type gasifier

The invention discloses a performance evaluation method of a liquefied natural gas (LNG) air temperature type vaporizer, which comprises the following steps of: 1, carrying out field test on a certain in-use LNG air temperature type vaporizer which is actually operated, carrying out flow-thermal coupling calculation analog simulation in finite element analysis software, and correcting a model by comparing test results; 2, fluid-heat-solid integral coupling calculation of the air temperature type gasifier for verification is conducted in finite element analysis software, a sub-model module is added for optimization, and verification testing and coefficient correction are conducted; step 3, performing fluid-heat-solid integral coupling calculation on the LNG air temperature type vaporizer to be evaluated under the design working condition and the working condition to be put into operation and use in a certain region, and performing performance evaluation on the vaporizer according to an output result; by means