Method and system for evaluating insulation performance of low-temperature storage tank

A system for evaluating insulation performance of a low-temperature storage tank, the system comprising:

• a sensor pad attached to a low-temperature storage tank;
• an infrared measurement device configured to measure infrared energy of the sensor pad;
• and
• a processor,
• wherein the processor is configured to:
• receive an amount of the infrared energy measured from the sensor pad;
• and
• calculate a value of heat flux infiltrating the low-temperature storage tank from an outside by using the received amount of the infrared energy.

A computer program for evaluating insulation performance of a low-temperature storage tank, the computer program comprising:

• a first instruction for measuring an amount of infrared energy of a sensor pad;
• a second instruction for assuming a temperature of a substrate of the sensor pad as a first temperature value;
• a third instruction for calculating a temperature of a first surface of the sensor pad by using the amount of infrared energy measured from the sensor pad and the first temperature value;
• a fourth instruction for obtaining a second temperature value of the substrate from a transient heat conduction equation by using the temperature of the first surface as a boundary condition;
• a fifth instruction for determining whether the first temperature value is equal to the second temperature value;
• and
• a sixth instruction for, when the first temperature value is equal to the second temperature value, determining the calculated temperature of the first surface as a final temperature of the first surface and obtaining a value of heat flux infiltrating the low-temperature storage tank from the outside.