Therefore, comparisons should be made between ASTEC_REF and MAAP_SEN for the isentropic expansion and between ASTEC_SEN and MAAP_REF for the isothermal expansion of the accumulators.
For the given initial and final pressures, an isothermal expansion of the gas stored in the accumulators results in 35% higher final volume compared to an isentropic expansion as shown in
The theoretical isothermal expansion would have resulted in the final volume of 37.71 [m.sup.3], close to the MAAP prediction.
For the gradual RCS depressurization and intermittent accumulator discharge in SBLOCAs, isothermal expansion of the accumulator gas would be more appropriate .
Similarly, in the ideal isothermal expansion, mechanical exergy from the compressed air is completely converted into electrical energy.
Storage energy is the amount of work extracted from the isothermal expansion of compressed air to the atmospheric pressure.