An innovative approach to recovery of fluctuating industrial exhaust heat sources using cascade Rankine cycle and two-stage accumulators

The fluctuating property of the heat source is a technical obstacle waste recovery, which leads to part-load operation and reduced economics. This work presents novel system mitigate fluctuations by using steam-organic Rankine cycles (RC-ORC) two-stage steam accumulators. can switch between isothermal storage discharge simply regulation water mass flow (m2) from low-temperature accumulator (LTA) high-temperature (HTA). In charge mode, m2 rises when inlet temperature or increases. level HTA elevates. Analogously, in decreases more accumulates LTA. RC-ORC operates under rated condition consistently through unique structural design. fundamentals features are illustrated. Given two typical conditions, thermal efficiencies minor (15.63–15.84% 19.57–19.70%). Thermo-economic estimation tanks indicates that steel cost roughly 1306 $ 432 $, respectively. Compared with single-stage ORC stream control, normalized investment (NIC) 888–925 $/kW.