For practical closed-loop applications, special consideration must be given to the flow rate limitations of the system. This is to be expressed by an additional index, the Operational Exergy Charge Reponse (цо&я), whereby:

t

Edelivered (t) = Eavail(t) dt
0

Edelivererd is a representative of a given day’s energy profile. The maximum exergy associated with the energy profile is subject principally to an upper temperature limit, Tdelivered. This can be the desired delivery temperature of the TES, the system’s stagnation temperature, or the working fluid’s boiling temperature. By applying the цо^ск to the fully stratified TES, one may gather a better indication of the exergy potentially lost due to the system’s flow rate limitations.