ratio of the integrated discharge capacity to the hypothetical maximum available capacity for a single cycle of operation. Note: Hypothetical maximum available capacity is computed as follows—for sensible storage, multiply the average specific heat of the storage medium by the mass of the medium in storage and the difference between the average storage inlet temperatures during charging and discharging, for a single cycle. For latent storage, multiply the change in specific enthalpy associated with the liquid-solid phase change by the mass of medium in storage that changes phase, for a single cycle.