Terminology and Definitions

This subsection provides a list of terms that are used in the subsequent sections and their meaning, with the purpose of reducing ambiguity and making it easier to correctly understand the requirements.

• Heat flux: The rate of thermal energy transfer through a given surface per unit time.
• Phase change material: A substance that uses phase changes (such as melting) to absorb or release large amounts of heat at a constant temperature.
• Specific heat capacity: The amount of energy required to raise the temperature of the unit mass of a given substance by a given amount.
• Thermal conduction: The transfer of heat energy through a substance.
• Transient: Changing with time.