American Society of Mechanical Engineers

This Code applies to mechanical or thermal ESS including, but not limited to, compressed air, flywheel, molten salt, and pumped hydromechanical ESS and sensible, latent, cyrogenic, thermochemical, ice-based, or phase-change-material thermal ESS. ASME PTC 53 applies to the measurement of the performance of an ESS at the specified conditions, with all equipment associated with the system functioning in accordance with those conditions.