Comparative study on steam flash, organic flash and Kalina for enhanced power generation from waste heat recovery

G. V. Pradeep Varma, T. Srinivas


A huge amount of waste hot gases from cement factories are available for power generation. The current work is focused
on enhancing the power from the hot gas with proper power augmentation and selection of technology. The selection of
power plant and working fluid influences the output from waste heat recovery. In the current work, three power plants are
considered at low temperature heat recovery (LTHR) and five power plants are considered at intermediate temperature heat
recovery (ITHR). Organic Rankine cycle (ORC), organic flash cycle (OFC), Kalina cycle system (KCS) are studied at LTHR
and ITHR and steam Rankine cycle (SRC) and steam flash cycle (SFC) are studied at ITHR. R124 and ammonia are selected
respectively at LTHR and ITHR organic cycles (ORC and OFC). Following a comparative study, OFC is recommended for
LTHR and KCS is recommended for ITHR on the basis of maximum power generation.


energy; efficiency; flash cycle; heat recovery; Kalina

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