Energy storage system performance indicators

Can FEMP assess battery energy storage system performance?

This report describes development of an effort to assess Battery Energy Storage System (BESS) performance that the U.S. Department of Energy (DOE) Federal Energy Management Program (FEMP) and others can employ to evaluate performance of deployed BESS or solar photovoltaic (PV) +BESS systems.

What is an example of a stored energy indicator?

Examples of such indicators are the stored energy in the PCM divided by the phase change time [ 66] or the stored energy in the PCM divided by the total stored energy [ 67] or the average efflux of energy divided by the stored energy [ 68 ].

What are some examples of indicators in a storage system?

Examples are the geometry of the storage system, the mass of the individual components but also the equations of state for the materials constituting the storage system. The second type of indicators concerns a part of the storage cycle (either charging, storage, or discharging) and are thus described by Equation (3).

What is the scope of the energy indicator?

The scope of the indicator is to consider which part of the total energy required by the building/group of buildings (or by a specific function, such as heating or artificial lighting) and/or the generation from RES, during a certain period, is stored-in and then released from the storage system.

What are the main KPIs for the assessment of ESSs in buildings?

The main KPIs to allow the assessment of ESSs in buildings are presented and descried below. 1. Storage capacity This is the quantity of stored energy in the storage system or available immediately after it is completely charged.

Can a LTEs heat exchanger be a KPI?

The interaction of a LTES heat exchanger is determined by the energy transfers or the right-hand side of Equation (3). Therefore, only the energy transfer and time indicators can be KPIs while the state indicators cannot be KPIs.